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LEFOO SINCE 2000
2026 www.lefoo.com
LEFOO was founded in 2ooo,has been developed to be a integrated manufacturing enterprises of R&D,manufacturing,and sales.LEFOO group has 3 branch companies and divisions which include LEFOO Industrial Co.,Ltd，LEFOO Controls Co.,Ltd, LEFOO Sensing Technology Co.,Ltd,.LEFOO is committed to become the leading and world-class enterprise in R& Dand manufacturing,to supply professional mechanical structure controls，electronic digital sensing controls,micro pumps,which can be widely used in environmental control，mechanical equipment， intelligent equipment, home appliances，medical，power, Internet of things，data center,water treatment, waterpurification,and other industrial fields.
LEFOO has passed ISO9001,IS016949,ISO45001，ISO 14001 management system certifications and CE,3C,UL，CSA,RoHS，and safety certifications by authoritative TUV and SGS,with more than 130 patents in total. Over the past 20 years,LEFOO's market throughout more than 80 countries and regions in North America,Europe,Asia, South America,Africa,Australia.As a professional and trustworthy supplier,LEFOO has cooperated and established strategic partnership with many great companies and world famousbrand.
Pressure Switch
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LF08
Small Multi-purpose Pressure Switch,0.2\~45bar
LF08A
High Current Pressure Switch,0.2\~45bar
LF08D
Small Multi-purpose Pressure Switch,60\~250bar
LF08E
Pressure Switch for Water Purifier
LF08F
Pressure Switch
LF08H
Small Multi-purpose Pressure Switch
LF08M
Manually Reset Pressure Switch
LF08V
Small Vacuum Pressure Switch,-0.5\~-0.8bar
LF10
Air Compressor Pressure Switch,25\~200psi
LF10-L
Air Compressor Pressure Switch,30\~175psi
LF10-W
Pump Pressure Switch,15\~150Psi
LF12
Air Pressure Switch
LF15
Pressure Switch
LF16
Pump Pressure Switch,20\~100Psi
LF17
Air Compressor Pressure Switch,15\~500Psi
LF17-W
Pump Pressure Switch,14\~250Psi
LF18
Air Compressor and Pump Pressure Switch,1.0\~16.0bar LF19
AirCompressorand Pump Pressure Switch,2.5\~12.5bar LF20
Extended Duty Pressure Switch,0.5\~150Psi
LF20-H
Ultra Duty Pressure Switch,10\~400Psi
LF20-V
Vacuum Pressure switch,1.1\~22in/Hg
LF20-I
Pressure switch
LF25
Vacuum Pressure Switch,0.2\~9.0bar
LF30
Air Differential Pressure Switch,0.4\~8.0mbar
LF31A
Air Differential Pressure Switch,0.08\~34inW.C
LF32
Air Differential Pressure Switch,20\~5000Pa
LF35
Air Differential Pressure Switch,0.3\~30mbar
LF37
Liquid Level Pressure Switch 2 - 6 0 in W.C.
LF40-01
Air Actuated Pressure Switch,0.25\~15psi
LF40-B
Pressure Switch
LF40-C
Pressure Switch
LF55
Pressure Switch For Refrigeration System,-0.5\~42bar LF55V
Vacuum Pressure Switch
LF55E
Pressure Switch
LF55T
Thermostat
LF58
Pressure Switch For Refrigeration System,-0.2\~32bar LF5D
Oil Differential Pressure Switch For Refriaeration Svstem
Pressure Switchand Refrigeration Parts
LF56
Pressure Switch
LF52
Differential Pressure Switch
LF52A
Differential Pressure Switch
FS5Series
Liquid Flow Switch
FS20Series
Liquid Flow Switch
FS211
Electronic Flow Switch
FS213
Electronic Flow Switch
TS
Temperature Controller
TSD
Differential Temperature Controller
TSH
Dual Temperature Controller
LFS-01
Miniature Pressure& Vacuum Switch,-800\~-5mbar,10\~600mbar LFS-02
Miniature Pressure& Vacuum Switch,-800\~-5mbar,5\~800mbar LFS-03
Miniature Pressure& Vacuum Switch,-800\~-15mbar,15\~2500mbar LF708
Pressure Switch
LF727
Pressure Switch
LF730
Pressure Switch
LF802
Pressure Switch
LF802A
Pressure Switch
LF803
Pressure Switch
LF803A
Pressure Switch
LF804
Pressure Switch
LF804A
Pressure Switch
LFDET
Electrical Differential Pressure Indicator
LFB
Differential Pressure Gauge
LFBMR
Differential Pressure Gauge
LFZ
Standard Rotary Actuator
LFZ-Q
Fast Running Rotary Actuators
LFZ-T
Spring Reset Damper Actuator
LFZ-DQ
Electrical Regulating Ball Valve
LFSV-D.
Solenoid Valve
LFSV-K
Solenoid Valve
LFFDF
Solenoid Valve
LFMBV
ElectricBall Valve
LFBV
Ball Valve
LFSG
Sight Glass
LFCV
Charging Valve
LFTEV
Thermostatic Expansion Valves
LFDBV
Discharge-Bypass Valves
LFDCV
Magnetic Check Valve
LowDifferential Pressure Transmitters
LFM108
Economical Differential Pressure Transmitter,-10oo0\~10000Pa
LFM11
Differential Pressure Transmitter,-10o00\~10000Pa
LFM33
Differential Pressure Transmitter/Controller,-10oo0\~10000Pa
LFM52
Differential Pressure Transmitter,-10000\~10000Pa
LFM53
HighAccuracy Differential Pressure Transmitter,-10o\~100Pa
LFM55
Embedded Differential Pressure Transmitter(SS Panel),-10o\~100Pa
LFM57
Atmosphere Pressure Transmitter,15kPa\~130kPa
LFM73
Multifunctional DP Transmitter/Controller,-10oo0\~10000Pa
LFM751
Intrinsic SafetyDifferential Pressure Transmitter,-10oo0\~10000Pa
LFM76
Explosion-proof DP Transmitter(dual output),±10oPa\~±10000Pa
LFM77
Explosion-proof DP Transmitter(single output),±10oPa\~±10000Pa
Pressure Transmitter
LFT2000
UniversalPressureTransmitter,100kPa\~0.3MPa...6MPa,0\~0.3MPa...60MP&
LFT2010
HighAccuracyPressureTransmitter,0\~O.1...-4MPa
LFT2020
SanitaryFlatDiaphragmPressureTransmitter,-10okPa...O\~10kPa...6MPa
LFT2030
HighTemperature Pressure Transmitter,-10okPa...0\~10kPa...60MP
LFT2050
DifferentialPressureTransmitter,0\~10kPa..3.5MPa
LFT2060
Refrigeration Pressure Transmitter,O\~10..50Bar
LFT2080
Anti-corrosion Pressure Transmitter,-100kPa\~100kPa...2MPa
LFT2600
Refrigeration Pressure Transmitter,O\~10...50Bar
LFT2700
FlatDiaphragmPressureTransmitter,-10okPa...0\~20kPa...35MPa
LFT2800
PressureTransmitter,-100kPa...0\~1kPa...60MPa
LFT3000
SubmersibleLevelTransmitter 0 ~ 0 . 5 . . . 2 0 0 \mathsf { m } \mathsf { H } _ { _ 2 } \mathsf { O }
LFT3100
Temperature&Pressure Transmitter,0\~10kPa...70MPa
LFT3200
Temperature&LevelTransmitter 0 ~ 1 . . . 2 0 0 \mathsf { m } \mathsf { H } _ { 2 } \mathsf { O }
LFT6100
DigitalPressureGauge,-100kPa...0\~100kPa...60MPa
LFT6200
Explosion-proofPressure Transmitter,-10okPa...0\~5kPa...60MPa
LFT6700
SmartPressure Transmitter,0\~10...60MPa
LFT221
Water Pressure Transmitter,O\~1MPa
LFT6800
DigitalDisplayPressureTransmitter,-100kPa..0\~5kPa...60MPa
LFT700
Smart PressureTransmitter
Differential PressureTransmitters
LFT710
SmartDPTransmitter
LFT720A
Flange-mounted DPTransmitter
LFT720B
RemoteFlange DPTransmitter
Digital Pressure Switches
LFDS62
Digital Pressure Switch,0\~10Bar、0\~16Bar
LFDS63
Digital Pressure Switch
LFDS65
Digital Pressure Switch
LFDS68
PressureSwitchTransmitter
Temperature&humidity TemperatureTransmitters
LFH10
Temperature&HumidityTransmitter
LFH10A
Economical Temperature&Humidity Transmitter
LFH20
RoomTemperature&Humidity Transmitter
LFH21
Temperature&Humidity Controller
LFH30
HighAccuracy Temperature&Humidity Transmitter
LFH51
Probe_Type Temperature&HumidityTransmitter
LFH52
OutdoorTemperature&HumidityTransmitter
LFH60
MagneticTemperature&HumidityTransmitter
LFH70
High-temperature Temperature&Humidity Transmitter
LFW10
LeWerature Transmiter
Armored Temperature Transmitter
LFW21
IntegratedTemperatureTransmitter
Gas Detecting Transmitters
LFG101
Wall-mounted Carbon MonoxideTransmitter
LFG103
Room CarbonMonoxideTransmitter
LFG201
Wall-mounted Carbon DioxideTransmitter
LFG202
Duct Carbon Dioxide Transmitte
LFG203
Room Carbon Dioxide Transmitter
LFG303
RoomDustPM2.5&PM10 Transmitter/Controller
LFG60
All-In-One Air Quality Transmitter
Air Velocity Transmitters
LFS10
AirVelocityTransmitter
LFS11
Low-speedAir Velocity Transmitter
LFS71
Explosion-proof Air Velocity Transmitter(single output)
LFS72
Explosion-proof Air Velocity Transmitter(dual output)
Flowmeters
LFLD ElectromagneticFlowmeter
LFLUGB VortexFlowmeter
SolenoidValve
VULU InletSolenoidValve LFV18 ColdWaterInletSolenoidValve LFV19 ColdWaterInletSolenoidValve LF42 Waterdispensers high and low pressure switch LFSV20-B DrainageSolenoid Valve
9US CQC CE SA33144
The LFO8 switchesare fixed set point, factory calibrated pressure switches.Itis automatic reset,and can be Normally open or normally close contacts.All metallic wetted components make the LF08 switch compatible with a multitude of chemicals in liquid or gas form. It is offered numerous types of electrical terminations from different sizeand style pushon terminalstowire leads withan array of standard industry connectors.In house machining capabilitiesallows Lefoo to offerawide variety of pressure fiting from different thread types and sizes to units with internal deflator and cupper tubbing for sawing operations.
Dimension in:mm
LF08 Order Ref NO LF08-1 01C-0.2-0.3MPa
A BCD Pressure setting:On value :0.2MPa, Off value :0.3MPa
Note: ① The on-value isatfront,and the off-value is at back ② Lessthan1.5MPacanbenopressure differential on customers'request.
| AElectricalconnectiontype BPressureconnectiontypeCInterfacematerialDElectricalcircuit | ||||||
| Code 1 | 1-Wire type | 0-Other (rod/barb) | 1-Stainless steel | C-SPST(NC) | ||
| 2 | 2-Blade type | 2-M thread (below M10) | 2-Brass | O-SPST(NO) | ||
| 3 | 1 | 3-M thread (above M12) | ||||
| 4 | / | 4-NPT thread | / | / | ||
| 5 | 5-Rthread | / | / | |||
| 6 | / | 6-G thread | ||||
| 7 | 7-UNF thread | |||||
| 8 / 8-Coppertube 8-Copper / | ||||||
| Specification | ||||||
| MODEL LF08 | ||||||
| Pressure settingrange (gauge pressure) | 0.02MPato6.5MPa; Low pressure below1.0MPa; High pressureabove1.0MPa Operating pressure value Tolerance Withstand maximum pressure | |||||
| 1.5MPa | ||||||
| Operating pressure/Tolerance/ | 0.02≤ | ±0.03MPa | ||||
| 0.6≤ | ±0.05MPa | 2.0MPa | ||||
| 1.0≤ | ±0.07MPa | 3.0MPa | ||||
| 3.0≤ | ±0.10MPa ±0.15MPa | 4.0MPa 5.5MPa | ||||
| 4.0≤ | ±0.20MPa | 6.5MPa | ||||
| 5.0≤ | ||||||
| ±0.25MPa | 8.0MPa | |||||
| 34.5MPax1min,nodamage,leakage | ||||||
| Operating temperature | Ambienttemperature | Medium temperature | ||||
| Low pressure:-40°C~65°C High pressure:-40°C~120°CLow pressure:-40°C~80°CHigh pressure:-40°C~135°C | ||||||
| 24~250VAC/0.02~6A;8~36VDC/0.02~3A;600VAC/0.02~3A(UL) | ||||||
| Electrical parameter Medium | 120VAC/6A;250VAC/6A(CE) 250VAC/3A(CQC) | |||||
| Note:The maximum currentis 0.5Aifit's no differential pressure version to ensure electrical life | ||||||
| Air,water,oil,lubricants,refrigerantsand other similarhydrocarbons | ||||||
| Service life | Mechanical life:100,000 Electrical life:30,000(UL,CE) | |||||
| IPlevel | Ip67 | |||||
| Certification | CQC,CE,UL | |||||
Pressure setting:Onvalue:0.2MPa,Offvalue:0.3MPa
Note: ① The on-value isat front,and the off-value is at back ② No pressure differential is notavailable
| Code AElectricalconnectiontype BPressureconnectiontypeCInterfacematerialDElectricalcircuit | ||||
| 1 | 1-Wire type | 0-Other (rod/barb) | 1-Stainlesssteel | C-SPST(NC) |
| 2 | 2-Blade type | 2-Mthread (belowM10) | 2-Brass | O-SPST(NO) |
| 3 | 3-M thread (above M12) | / | D-SPDT | |
| 4 | / | 4-NPTthread | / | / |
| 5 | 5-R thread | / | / | |
| 6 | / | 6-Gthread | / | / |
| 7 | 7-UNF thread | / | / | |
| 8 | / | 8-Coppertube | 8-Copper | / |
| MODEL | ||||
| Pressuresettingrange (gaugepressure) | 0.01MPato6.5MPa;Lowpressurebelow1.0MPa;Highpressureabove1.0MPa | |||
| Operating pressure value | Tolerance | Withstand maximum pressure | ||
| 0.1≤ | ±0.03MPa | 1.5MPa | ||
| 0.6≤ | ±0.05MPa | 2.0MPa | ||
| 1.0≤ | ±0.07MPa | 3.0MPa | ||
| 2.0≤ | ±0.10MPa | 4.0MPa | ||
| 3.0≤ | ±0.15MPa | 5.5MPa | ||
| 4.0≤ | ±0.20MPa | 6.5MPa | ||
| 5.0≤ | ±0.25MPa | 8.0MPa | ||
| Burst pressure (gauge pressure) 34.5MPax1min,nodamage,leakage | ||||
| Operating temperature | Ambienttemperature | Medium temperature | ||
| Lowpressure:-40°C~65°c|High pressure:-40°C~120℃C | 36VDC/15A | Lowpressure:-40°C~80°CHigh pressure:-40°C~135°C | ||
| Electricalparameter | 120VAC/20A,250VAC/10A | |||
| Medium | Air,water,oil,lubricants,refrigerantsand othersimilarhydrocarbons | |||
| Service life | Mechanical life:100,000 | |||
| IP level | Electrical life:30,000 | |||
LF08D Small multi-purpose Pressure switch
LEFOO
LF08Dseries pressure switch isa switch with automatic reset design. With a wide pressure setting range, it can be applied to different requirements.It is used for air, water pressure control, electrical refrigeration equipment,indoorair conditioners or internal circuitsofindoor cooling devices,domestic cooling systems,andinternal circuitsoflong-distance outdoor condensing devices.Typical applications:High-pressure shutdownswitch/air-conditioning/freezingequipment.
ABCD
Pressure setting:Onvalue:0.2MPa,Offvalue:0.3MPa
Note: ① The on-value isat front,and the off-value isatback ② Less than 0.6MPacanbeno pressure differential on customers'request.
| Code AElectricalconnectiontype | BPressureconnectiontypeCInterfacematerialDElectricalcircuit | |||
| 1 | 1-Wire type | 0-Other (rod/barb) | 1-Galvanized iron | C-SPST(NC) |
| 2 | 2-Bladetype | 2-Mthread(belowM10) | / | O-SPST(NO) |
| 3 | 3-M thread (above M12) | / | ||
| 4 | / | 4-NPTthread | / | |
| 5 | / | 5-R thread | / | / |
| 6 | / | 6-Gthread | / | / |
| 7 | / | 7-UNF thread | / | |
| 8 | / | / | ||
| Model LF08D | ||||
| Pressure seting range (gauge pressure) | 0.02MPato2.0MPa;Lowpressurebelow1.0MPa;High pressureabove1.0MPa | |||
| Operating pressure /Tolerance/ Withstand pressure (gauge pressure) | Operating pressure value | Tolerance | Withstand maximum pressure | |
| 0.02≤ | ±0.03MPa | 1.5MPa | ||
| 0.6≤ | ±0.05MPa ±0.07MPa | 3.0MPa | 2.0MPa | |
| 1.0≤ | ||||
| Burstpressure (gaugepressure) 5MPax1min,nodamage,leakage | ||||
| Ambienttemperature Medium temperature | ||||
| Operating temperature Low pressure:-40°C~65℃ High pressure:-40°C~80°CLow pressure:-40°C~80°CHigh pressure:-40°C~100°C | ||||
| 24~250VAC/0.02~15A;8~36VDC/0.02~15A(UL) Electrical parameter | ||||
| 120VAC/15A;250VAC/15A(CE) | ||||
| Note:The maximum current is 0.5Aif it's no differential pressure version to ensure electrical life | ||||
| Medium Air,water | ||||
| Service life Mechanical life:100,000 | Electrical life:30,000(UL,CE) | |||
| IP level Ip67 CE,UL | ||||
LF08E Pressure switch for Waterpurifier
A BCV Pressure setting:On value :0.2MPa, Off value :0.3MPa
Note: ① The on-value isat front,and the off-value isat back ② Less than O.6MPa canbeno pressure differential on customers'request.
This product is specially designed for water purifier,whichcanreplacetraditional high-low pressure switch.It is more sensitive action and used for wider range of applications.
| 1 | 1-Wire type | 0-Other (rod/barb) | 1-Galvanized iron | C-SPST(NC) |
| 2 | 2-Blade type | / | / | O-SPST(NO) |
| 3 | / | / | / | |
| 4 | / | / | / | / |
| 5 | / | / | / | |
| 6 | / | / | / | / |
| 7 | / | / | / | / |
| 8 | / | / | / | / |
| Model LF08E | |||
| Pressure setting range (gauge pressure) | 0.02MPato1.0MPa;Lowpressurebelow0.6MPa;Highpressureabove0.6MPa | ||
| Operating pressure /Tolerance/ | Operating pressure value | Tolerance | Withstand maximum pressure |
| Withstand pressure (gauge pressure) | 0.02≤ | ±0.03MPa | 1.5MPa |
| 0.6≤ | ±0.05MPa | 2.0MPa | |
| Burst pressure (gauge pressure) | 3.2MPax1min,no damage,leakage | ||
| Operating temperature | Ambient temperature | Medium temperature | |
| Lowpressure:-40°C~65CHigh pressure:-40°C~80C | Lowpressure:-40°C~80°CHigh pressure:-40°C~100°℃ | ||
| Electrical parameter | 24~250VAC/0.02~6A;8~36VDC/0.02~3A | ||
| Note:Themaximum currentis 0.5Aifit'sno differential pressure version toensureelectricallife | |||
| Medium | Air, water | ||
| Service life | Mechanical life:100,000 | Electrical life:30,000 | |
| IP level | |||
LF08F Pressure switch
AUS CQC CE
Dimension in:mm
| LFO8Dseries pressure switch is a switch with automatic reset design. With a wide pressure setting range, it can be applied to diferentrequirements.Itisusedforair.waterpressurecontrolLFO8FOrderRefN ABCDPressuresetting:Onvalue:0.2MPa，Offvaue:0.3MPa Note: ①The on-value is at front,and the off-value is at back | |||||||
| electrical refrigerationequipment,indoorairconditionersorLF08F-101C-0.2-0.3MPa internal circuits ofindoor cooling devices,domestic cooling | |||||||
| pump/fouraxis/five axis turntable equipment ②No pressure differential isnot available | |||||||
| Code A Electrical connection type BPressure connection typeC Interface material D Electrical circuit | |||||||
| 1 1-Wire type | 0-Other (rod/barb) | 1-Stainless steel | D-SPDT | ||||
| 2 2-Blade type | 2-M thread (below M10) | 2-Brass | / | ||||
| 3 | 一 | 3-M thread (above M12) | / | / | |||
| 4 | / | 4-NPTthread | / | / | |||
| 5 / | 5-R thread | / | / | ||||
| 6 | 6-G thread / | ||||||
| 7 / 7-UNF thread | |||||||
| 8 8-Copper tube | |||||||
| Specification | |||||||
| Model LF08F Pressuresettingrange (gaugepressure) 0.02MPato6.5MPa;Lowpressurebelow1.0MPa;Highpressureabove1.0MPa | |||||||
| Operating pressure value Tolerance Pressure differenceWithstand maximum pressure | |||||||
| ±0.03MPa | ≥0.25MPa | 1.5MPa | |||||
| 0.02≤ | ±0.05MPa | ≥0.4MPa | 2.0MPa | ||||
| Operating pressure/Tolerance/ | 1.0≤ | ±0.07MPa | ≥0.5MPa | 3.0MPa | |||
| Withstand pressure (gauge pressure) | 2.0≤ | ±0.10MPa | ≥0.6MPa | 4.0MPa | |||
| 3.0≤ | ±0.15MPa | ≥0.7MPa | 5.5MPa | ||||
| 4.0≤ | ±0.20MPa | ≥0.8MPa | 6.5MPa | ||||
| Burst pressure (gauge pressure) | 34.5MPax1min,no damage,leakage | ||||||
| Operating temperature | Ambienttemperature Medium temperature | ||||||
| Lowpressure:-40°C~65°CHigh pressure:-40°C~120°CLow pressure:-40°C~80°CHigh pressure:-40C~135C | |||||||
| Electrical parameter | 24~250VAC/0.02~6A;8~36VDC/0.02~3A; | ||||||
| Medium | Air,water,oil,lubricants,refrigerantsand other similar hydrocarbons | ||||||
| Service life | Mechanical life:100,000 Electrical life:30,000 | ||||||
| IP level | Ip67 | ||||||
ABCD Pressuresetting:Onvalue:0.2MPa,Offvalue:0.3MPa
This product is generally used for cooling fans, long life canbeappliedtothe frequentstartof fan fans.This product canalso meet the demand for pressure control equipment with relatively long service life requirements.
| Code AElectrical connectiontype BPressureconnectiontypeCInterfacematerialDElectrical circuit | ||||||
| 1-Wire type | 0-Other (rod/barb) | 1-Stainless steel C-SPST(NC) | ||||
| 1 2 | 2-Blade type | 2-Mthread (below M10) | 2-Brass | O-SPST(NO) | ||
| 3 | / | 3-M thread (above M12) | D-SPDT | |||
| 4 | / | 4-NPTthread | / | / | ||
| 5 | / | 5-Rthread | ||||
| 6 | 6-G thread | / | ||||
| 7 | / | |||||
| 8 | / | 8-Copper | / | |||
| Specification | ||||||
| Model LF08H | ||||||
| Pressure setting range (gauge pressure) 0.02MPa to6.5MPa; Low pressure below1.0MPa; High pressureabove1.0MPa | ||||||
| Operatingpressure/Tolerance/ Withstand pressure (gauge pressure) | Tolerance | Withstand maximum pressure | ||||
| Operating pressure value 0.02≤ | ±0.03MPa | 1.5MPa | ||||
| 0.6≤ | ±0.05MPa | 2.0MPa | ||||
| 1.0≤ | ±0.07MPa | 3.0MPa | ||||
| 2.0≤ | ±0.10MPa | 4.0MPa | ||||
| 3.0≤ | ±0.15MPa | 5.5MPa | ||||
| 4.0≤ | ±0.20MPa | 6.5MPa | ||||
| 5.0≤ | ±0.25MPa | 8.0MPa | ||||
| 34.5MPax1min,nodamage,leakage | ||||||
| Burst pressure (gauge pressure) | Ambient temperature | |||||
| Operating temperature | Low pressure:-40°C~65℃ | High pressure:-40°C~120°CLow pressure:-40°C~80C | Medium temperature High pressure:-40°C~135C | |||
| Electrical parameter | 24~250VAC/0.02~6A;8~36VDC/0.02~3A;600VAC/0.02~3A | |||||
| 120VAC/6A;250VAC/6A(CE) | ||||||
| Medium | Air,water,oil,lubricants,refrigerantsand othersimilar hydrocarbons | |||||
| Service life IPlevel | Mechanicallife:100,000 Electricallife:30,000(ULCE) | |||||
| Customizable for longer life Ip67 | ||||||
| Certification | UL CE | |||||
LF08M Manually reset Pressure switch
LF08MOrderRefNO LF08M-101C-0.2-0.3MPa
A BCD Pressure setting:On value:0.2MPa,Off value:0.3MPa
Note: ① The on-value isat front,and the off-value isat back ② Nopressuredifferential is notavailable
| 1 | 1-Wire type | 0-Other (rod/barb) | 1-Stainless steel | C-SPST(NC) |
| 2 | / | 2-Mthread (below M10) | 2-Brass | O-SPST(NO) |
| 3 | / | 3-M thread (above M12) | / | D-SPDT |
| 4 | / | 4-NPTthread | / | / |
| 5 | / | 5-R thread | / | / |
| 6 | / | 6-Gthread | / | / |
| 7 | / | 7-UNF thread | / | / |
| 8 | / | 8-Coppertube | 8-Copper | / |
Specification
| Model LF08M | |||||
| Pressure setting range (gauge pressure) | 0.2MPato6.5MPa;Lowpressurebelow1.0MPa;Highpressureabove1.0MPa | ||||
| Operating pressure /Tolerance/ | Operating pressure value | Tolerance | Withstand maximum pressure | ||
| 0.2≤ | ±0.03MPa | 1.5MPa | |||
| 0.6≤ | ±0.05MPa | 2.0MPa | |||
| 1.0≤ | ±0.07MPa | 3.0MPa | |||
| 2.0≤ | ±0.10MPa | 4.0MPa | |||
| 3.0≤ | ±0.15MPa | 5.5MPa | |||
| 4.0≤ | ±0.20MPa | 6.5MPa | |||
| 5.0≤ | ±0.25MPa | 8.0MPa | |||
| 34.5MPax1min,no damage,leakage | |||||
| Burst pressure (gauge pressure) Operatingtemperature | Ambienttemperature | ||||
| Low pressure:-40°C~65℃ | High pressure:-40°C~120°CLow pressure:-40°C~80°C High pressure:-40°C~135°C | Mediumtemperature | |||
| Electricalparameter | |||||
| Medium | 24~250VAC/0.02~6A;8~36VDC/0.02~3A | ||||
| Service life | Mechanical life:100,000 | Air, water, oil, lubricants,refrigerantsand other similar hydrocarbons Electrical life:30,000(UL,CE) | |||
| IPlevel | Ip67 | ||||
LF08VOrderRefNO
| LF08V-1 01C--0.05--0.07MPa |
A BC DPressure setting:On value :-0.05MPa, Off value :-0.07MPa
Note: ① The on-value isat front,and the off-value isatback ② Nopressure differential is notavailable
LF08V Small vacuum Pressure switch
LFO8V series pressure switch is designed automatic reset switch,used in vacuum environment,vacuum system applicable to electric car.
| 1 | 1-Wire type | 0-Other (rod/barb) | 1-Stainless steel | C-SPST(NC) |
| 2 | 2-Blade type | 2-Mthread(belowM10) | 2-Brass | O-SPST(NO) |
| 3 | / | 3-M thread (above M12) | 1 | / |
| 4 | / | 4-NPTthread | / | / |
| 5 | / | 5-R thread | / | / |
| 6 | / | 6-Gthread | / | |
| 7 | / | 7-UNF thread | / | / |
| 8 | / | 8-Coppertube | 8-Copper | / |
Specification
| MODEL LF08V | |||
| Pressuresetting range (gauge pressure) | -0.06MPato0MPa | ||
| Operatingpressure/Tolerance/ | Operating pressure value | Tolerance | Withstand maximum pressure |
| -0.06≤ | ±0.02MPa | 1.0MPa | |
| Withstand pressure (gauge pressure) Burst pressure (gauge pressure) | Pressure differential≥0.025MPa | ||
| 34.5MPax1min,nodamage,leakage | |||
| Operatingtemperature | Ambienttemperature | Mediumtemperature | |
| -20~65°C | -20~65°℃ | ||
| Electrical parameter | 24~250VAC/0.02~3A;8~36VDC/0.02~3A | ||
| Medium | Air,water,oil,ubricants,refrigerantsandothersimilarhydrocarbons | ||
| Service life | Mechanical life:100,000 | ||
| IP level Ip67 | Electrical life:30,000 | ||
LF10
The LF10 pressure switches are used to regulate the tank pressure between two preset values on small (up to 200psi) electrically driven air compressors.Theyare available with an unloadervalve,which prevents compressors from starting under load,and an auto-off disconnect lever formanual cut off the compressor.A four port manifold style isavailablewhich providesa means for easy mounting of valvesand gauges.
| Number | Contyection | Connection | Vanve Typr | Unlonner Valve | HTydle | |
| 0 | / | / | / | Without | Without | Without |
| 1 | single port | Bfemale | C1/4NPT | Dvertical | Φ6.0mm | longandbend |
| 2 | / | male | 3/8NPT | horizontal | EΦ6.4mm | longand straight |
| 3 | / | / | R1/4 | / | Φ6.5mm | Fshortand bend |
| 4 | Afour ports | / | R3/8 | / | / | shortand straight |
| 5 | / | / | G1/4 | / | / | / |
| 6 | / | / | G3/8 | / | / | / |
Specification
| Model | Media | Pressuratiange | Fatinry | Differential | Electrical | ArrContament | Connection |
| LF10 | Air | 25-100psi | 55-80psi | 20-35psi | 20A/120VAC 12A/240VAC | NC | 1/4,3/8Male or Female NPT (1Port) |
| Air | 35-150psi | 85-115psi | 30-40psi | ||||
| Air | 50-175psi | 110-150psi | 35-55psi | 1/4 Female NPT (4Ports) | |||
| Air | 70-190psi | 130-175psi | 40-55psi | ||||
| LF10A | Air | 25-100psi | 55-80psi | 20-35psi | 26A/120VAC 26A/240VAC | NC | 1/4,3/8Male or Female NPT (1Port) |
| Air | 35-150psi | 85-115psi | 30-40psi | ||||
| Air | 50-175psi | 110-150psi | 35-55psi | 1/4 Female NPT (4Ports) | |||
| Air | 70-190psi | 130-175psi | 40-55psi |
LF10-L Air compressor Pressure switch
LF10-L OrderRef NO
| LF10-L -4H1112 -85psi-115psi |
| trte L110 compressor. A four port manifold style isavailable. | |||
| A | |||
| Number Contyection | Connection ValnleTypr | ||
| 0 C1/4NPT | |||
| 1 singleport Bfemale DCopper 2 / 3/8NPT Plastic | |||
| 3 / / R1/4 / Φ6.5mm | |||
| 4 Afour ports / R3/8 / | |||
| / | |||
| 5 / / G1/4 / 6 | |||
| G3/8 / | |||
| Specification | |||
| Model Media Pressuretiange Factory Differential Electrical ArrContament Connection | |||
| G1/4,G3/8 or Setting | |||
| Air 45-175psi 85-115psi 30-45psi 120VAC、20A NC 1/4,3/8NPT Female G1/4,G3/8or1/4, Air 45-175psi 85-115psi 30-45psi 120VAC、20A NC 3/8NPTFemale | |||
LF10-W Pump pressure switch
LF10-WSandLF10-WR OrderRefNO
LF10(A)-W(SorR)-111-30-50psi
LF10-W series pressure switches provide time tested, reliable control for automatic water systems.The switchisuniversallyacceptable for use as original equipment on water well pumps or pumping systems.
| Number | Connection Type | Connection Size | |
| 1 | Asingle port | Bfemale | C1/4NPT |
| 2 | / | male | 3/8NPT |
| 3 | / | / | R1/4 |
| 4 | / | / | R3/8 |
| 5 | / | / | G1/4 |
| 6 | / | / | G3/8 |
| 7 | / | / | NPT1/4 Long Male |
| 8 | / | / | G1/4 Bolt Connectin |
Specification
| Model | Media | Pressuratiange | Factory | Differential | Eleatrical | ArrCnnement Connection | |
| LF10-WS (LF10A-WS) | Water | 15-82psi | 20-35psi | 15-30psi | 120VAC、20A (120VAC、26A) 240VAC、12A (240VAC、26A) | NC | 1/4NPT Male or Female |
| Water | 30-100psi | 30-50psi | 20-35psi | ||||
| Water | 35-150psi | 85-115psi | 30-40psi | ||||
| LF10-WR (LF10A-WR) | Water | 80-15psi | 50-30psi | 17-30psi | 120VAC、20A (120VAC、26A) 240VAC、12A (240VAC、26A) | NO | 1/4NPT Male or Female |
| Water | 100-30psi | 100-75psi | 25-30psi | ||||
| Water | 150-35psi | 125-95psi | 30-45psi |
LF12 Air Pressure Switches
LF 12 is three phase pressure switch,used for air compressor and water pump to regulate pressure between two preset values. It is available with an unloader value,which prevents compressor from starting under load and an On-Off knob for manual cut off the compressor or pump.A four port manifold style isavailable ,which makes easy mounting of other parts for air compressor,like valve and gauge.LF12 is available with thermal relay for overload protection.The relay will cut off the motor power timely to prevent the motor from burning when motorisoverloaded.
LF12 Pressure Range
| Model | OperatingPressureRange | DifferentialRange | Factory Setting |
| LF12 | 1-6bar | 0.7-2bar | 2/3bar |
| 3-11bar | 1.5-3.5bar | 6/8bar | |
| 6-16bar | 2-7bar | 9/12bar | |
| 5-25bar | 3-8bar | 16/20bar | |
| 12-35bar | 3-8bar | 25/30bar |
LF12OrderRefNO LF12-1-1-1-1-1
4 B F
| NO. | AConnection Type | BFemale ConnectionSize | C Unloader Valve Type | D Unloader dimensions | E Current ranges |
| 1 | Singleport | G1/4+3*G1/4 | No unloadervalve | without | 2.5-4A |
| 2 | Fourport | R1/4+3*R1/4 | Vertical M12(Brass) | 6.0-φ6.1 | 4-6.3A |
| 3 | 1/4NPT+3*1/4NPT | Vertical p6 tube quick connection (brass) p6.4-φ6.5 | 6.3-10A | ||
| 4 | G3/8+3*G1/4 | vertical oil resistantM12 (brass) | 10-16A | ||
| 5 | R3/8+3*R1/4 | Vertical Oil Resistant φp6 Tube Quick connection (Brass) | 16-20A | ||
| 6 | 3/8NPT+3*1/4NPT | vertical oil resistantM12 (zincalloy) | |||
| 7 | G1/2+3*G1/4 | Level Oil resistant M12 (zinc alloy) | |||
| 8 | R1/2+3*R1/4 | ||||
| 9 | 1/2NPT+3*1/4NPT |
Specification
| Medium | water,air | Operating temperature | -40~82°C(fluid) |
| Contact | Multi-pole single-throw (normallyclosed) | Protection class | IP54 |
| Electrical | Single-phase 120VAC/10A; | Cable Specifications | 10AWG-14AWG |
| 230VAC/10A | Contactmaterial | Static contact:silveralloy;moving contact:silveralloy | |
| Three-phase 120VAC/10A; | Appendix | Chinese/Englishmanual | |
| 20VAC/7:400VAC/11A | air tightness | no limum whenthersithisheldat1.2timesthe | |
| usage frequency | |||
| 500VAC/6A; 500VAC/9A; | It takes 30minutes to cool down for the thermal relay to start | ||
| 690VAC/4.5A; 690VAC/6.5A | Motor cycle frequency more than 5 minutes |
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LF15 series pressure switches,this product is used for adjusting the pressure which in the compressortankto operatebetweentwo preset pressure values.The pressure switch with an unloading valve prevents the air compressor fromoverloadingand the handle issupposed to manually power off the compressor. The fourway base connection makes the installation of additional partsmore convenient.
| Model | LF15 |
| Media | Air,non-flammable or non-hazardous non corrosive gases |
| Pressure adjusting range | 0.3-1.2Mpa |
| Differential pressure range | 0.15-0.45Mpa |
| Factory settings | accordingtouser'srequirements |
| Pressure setting point tolerance | ≤5%(Operating pressure value) |
| Max.working pressure | 1.2Mpa |
| Rated voltage,current,frequency | 120VAC/240VAC,26A/20A,50HZ/60HZ |
| Contactmode | NC |
| ConnectorType | Female-1-Port,Male-1-Port,F/M-2-Port,Female-4-Port |
| Interface thread | NPT1/4、R1/4、G1/4(could be customized) |
| Unloading valve | Without/with |
| Directionof unloading valve | Asrequired |
| Linerdiameterofunloadingvalve | Φ6.0mm、Φ6.4mm、Φ6.5mm(could be customized) |
| ManualMode | Without/with |
| WorkingTemperature | -20°℃~80°℃ |
| Voltage resistance | No breakdown in one minute under 2500V |
| Way to installation | vertically/horizontally |
| Protection grade | Ip20 |
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LF16 Pump pressure switch
LF16 OrderRefNO
| trol for automatic water systems.The switchis erselpucepgtablefouringeasoriginal eguilgmint on | LF16(-1)-111 -30-50psi | ||
| ABC Pressure setting:Cut in 30psi | Cutoff 50psi | ||
| Number | Connection Type | Connection Size | |
| 1 | A single port | Bfemale | C1/4NPT |
| 2 | / | male | 3/8NPT |
| 3 | / | R1/4 | |
| 4 | / | / | R3/8 |
| 5 | / | / | G1/4 |
| 6 | / | G3/8 | |
Specification
| Model | Mit-n | (Mut-Out) | Differential | Fetny | 120VAC240VACP 2A0AC | Arratget | Connection | ||
| LF16 | 15-30 | 20-40 | 2HP | 3HP | 5HP | NC | 1/4 Male | ||
| 20 | 80 | 15-30 | 30-50 | ||||||
| 15-35 | 40-60 | ||||||||
| 40 | 100 | 20-35 | 70-100 | 2HP | 3HP | orFemale NPT | |||
| 20 | 80 | 15-30 | 20-40 | ||||||
| 15-30 | 30-50 | 1.5HP | |||||||
| LF16-1 | 15-35 | 40-60 | |||||||
| 40 | 100 | 20-35 | 70-100 | 2HP | 3HP | 5HP | |||
LF17 Air compressor Pressure switch
The rugged LF17 pressure switch is designed for the demanding requirements of lager, heavy duty commercial air compressors (up to 250 psi).The sturdy painted steel case and cover resists the harsh conditions encountered in industrial applications.Thisstyle isalso availablewith an unloadervalveto prevent the compressor from starting under load.
| Number | Connection Type | Connection Size | Unloader ValveType | Unloader Valve Connection | |
| 1 | Asingle port | Bfemale | C1/4NPT | Dvertical | Φ6.0mm |
| 2 | / | male | 3/8NPT | horizontal | EΦ6.4mm |
| 3 | / | / | R1/4 | / | Φ6.5mm |
| 4 | / | / | R3/8 | / | / |
| 5 | / | / | G1/4 | / | |
| 6 | / | / | G3/8 | / | / |
| Model | Media | Operating Pressure Range | Factory Setting | Differential | Electrical Rating | Contact Arrangement | Connection | |
| LF17 | Air | 40-250psi | 140-175psi | 35-60psi | 120VAC、 24A | NC | 1/4,3/8NPT Male or Female | |
| Air | 15-60psi | 30-45psi | 15-20psi | |||||
| LF17A | Air | 240-500psi | 325-400psi | 55-70psi | 120VAC、30A |
LF17-W Pump pressure switch
S us CRuS 220707 E228961
The rugged LF17 pressure switch is designed for the demanding requirements of lager,heavy duty
LF17-WOrderRefNO
| commercial water pump system. | LF17-W -111 -80-100psi | |
| A B C Pressure setting:Cut in 80psi | Cutoff 100psi | |
| Number | ConnectionType | Connection Size |
| 1 | Asingleport Bfemale | C1/4NPT |
| 2 | male | 3/8NPT |
| 3 | / / | R1/4 |
| 4 | / / | R3/8 |
| 5 | / | G1/4 |
| 6 | / / | G3/8 |
Specification
| Model | Media | Operating Pressure Range | Factory Setting | Differential | Electrical Rating | Contact Arrangement | Connection |
| LF17-W | Water | 40-250psi | 80-100psi | 20-60psi | 120VAC、24A 240VAC、20A | NC | G,NPT1/4, 3/8Male or Female |
| Water | 14-100psi | 40-70psi | 14-50psi | ||||
| LF17-W5 | Water | 15-60psi | 30-45psi | 7-20psi |
LF18 Air compressor and pump Pressureswitch
The LF18 pressure switch is used to regulate the tank pressure between two preset values on 3 phase electrically drivenaircompressors.It isavailable withan unloader valve,which prevents compressors from starting under load, and it is available with an
| LF18 -4H11112 -85psi-115psi | On-Off knob for manual cut off the compressor. | |||||
| A BCDEF Pressure setting:Cut in 8bar Cut off 115psi | ||||||
| Number | Conyection | Connection | VunleTypr | Unlonner Valve | HTydle | |
| 0 | / | / | / | without | without | without |
| 1 | single port | Bfemale | CG1/4 | Dvertical(brass) | Φ6.0mm | FON/OFF Knob |
| 2 | / | / | G1/2 | vertical(zinc alloy) | EΦ6.4mm | / |
| 3 | two ports | / | 1/4NPT | horizontal(zincalloy) | Φ6.5mm | / |
| 4 | Afour ports | / | 1/2NPT | horizontal(plastic) | / | / |
| 5 | / | / | R1/4 | / | / | / |
| 6 | / | 一 | R1/2 | / | ||
| Model | Media | Operating Pressure Range | Factory Setting | Differential | Electrical Rating | Contact Arrangement | Connection |
| LF18 | Air | 1.0-5.0bar | 2.0-4.0bar | 1.0-3.0bar | 400VAC-3 16A/25A | NC | 1/40 1/2N2PT, Female |
| 2.0-8.0bar | 3.8-5.0bar | 1.0-3.0bar | |||||
| 3.0-11.0bar | 5.6-7.0bar | 1.4-4.0bar | |||||
| 4.0-16.0bar | 8.0-10.0bar | 1.8-4.5bar |
LF19
Air compressorand pump
Pressure switch
US CE cuUS 220707
LF19pressure switches provide time tested,reliable control for automatic water systems.The switchis
LF19 OrderRefNO
| universally acceptable for use as original equipment on witeron-oufnsofomanial utets. tisapaiable | LF19-411121 -7.5-10.5bar | |||||||
| Connection | ABCDEF Pressure setting:Cut in 7.5bar Unloader | Cut off 10.5bar UnloaderValve | ||||||
| Number | Type | Connection | Size | Valve Type | Connection | Type without | ||
| 0 | / | / Bfemale | without | without | ||||
| 1 2 | singleport / | C G1/4 | Dvertical(brass) | Φ6.0mm | FON/OFF Knob | |||
| 3 | threeports | G1/2 | vertical(zinc alloy) horizontal(zincalloy) | EΦ6.4mm | ||||
| 4 | Afour ports | 1/4NPT 1/2NPT | horizontal(plastic) | Φ6.5mm | ||||
| 5 | / | R1/4 | ！ | ！ | ||||
| 6 | / | R1/2 | / / | / | / / | |||
| Specification | / | / | ||||||
| Model | Media | Unloader | PreSsuratiange | Factory | Differential | Electrical 250VAC | ArrContament | |
| LF19 | Air | With | 1-6bar 2-11bar | 2-4bar 6-8bar | 1-3bar | 1.4-3.5bar | NC | |
| 5-14bar | 8-10bar | 1.8-4.0bar | ||||||
LF20 Extended duty Pressureswitch
| Number | PrinturenSet | Circuitry | BaseMaterial | Connection | Terminals | Cover |
| 0 | / | / | / | / | none | |
| 1 | 0.5-1psi±0.3psi | BSPST-NC | Cbrass | D1/8NPT | E 1/4blade | FcoverA |
| 2 | 1.1-3psi±0.5psi | SPST-NO | plated steel | 1/4NPT | #8-32 scerws | cover B |
| 3 | 3.1-7psi±1psi | SPDT-NO-C-NC | stainlesssteel | R1/8 | wireleads | / |
| 4 | A8-13psi±2psi | SPST-NO(adjustable) | / | R1/4 | / | / |
| 5 | 14-24psi±3psi | SPDT-NO-C-NC(adjustalble) | / | G1/8 | / | / |
| 6 | 25-50psi±5psi | / | / | G1/4 | / | |
| 7 | 51-90psi±7psi | / | / | / | / | / |
| 8 | 91-150psi±10psi | / | / |
| MODEL | LF20 |
| Media | Air,watermotoroils,transmission oils,jetfuelsand other similar Hydrocarbon Media |
| Pressure SetPoint | Factorysetfrom 0.5to150psi |
| Max Operating Pressure | 150psi for 0.5-24psi-set point range,250psi for 25-150psi set point range |
| Proof Pressure | 500psi |
| Burst Pressure | 750psi for 0.5-24psi set point range,1250psi for 25-150psi set point range |
| OpeatingTemperatureRange | -40℃to+120℃ |
| Switch Type | Directaction,bladecontact |
| Electric Rating | Resistive:15AMP-6VDC、8AMP-12VDC、4AMP-24VDC |
| Contact Arrangement | Inductive:1AMP-120VAC、0.5AMP-240VAC SPST-NONusalb |
| Terminal | #8-32 screws,1/4" blade |
| Connection | 1/8-27NPTMale |
| Material | Contact:silverallygold plated;Base:brass;Cover:glass reinforced polyester;Diaphragm:polyimide film |
| Options | Plated Steel,plasticorstainless steel base;variousbase connector threadsizse; wire leads(potted&sealed);Teflone or EPDMdiaphragm |
LF20-H UItra duty Pressure switch
The LF20-H pressure switches are robust, compact and designed tooperate in harshenvironmentsat various pressures.The switch is factory calibrated but in the case thatadjustmentisneededinthe field theswitchoffers anadjustment screw to facilitate any fine tuning required.The standard diaphragm employedis polyimide making it compatible with many gases and liquids.Several other diaphragmmaterialsareavailable that make the switch compatible with many mediums. Variouselectrical terminationsare availableincluding tabs and a metric-pack connector that forms a tight seal when connected.
LF20-HOrderRefNO
LF20-H-412111 -175psi
| Number | PrinturenSet | Circuitry | BaseMaterial Connection | Terminals | Cover | |
| 0 | / | / | none | |||
| 1 | 10-35psi±3psi | BSPST-NC | D1/8NPT | E1/4 blade | FcoverA | |
| 2 | 35-75psi±7psi | SPST-NO | Cplated steel | 1/4NPT | #8-32 screws | coverB |
| 3 | 75-150psi±10psi | SPDT-NO-C-NC | stainlesssteel | R1/8 | wire leads | / |
| 4 | A150-250psi±20psi | SPST-NO(adjustable) | / | R1/4 | / | / |
| 5 | 250-400psi±50psi | SPDT-NO-C-NC(NO.adjustalble) | / | G1/8 | / | / |
| 6 | / | / | G1/4 | / | ||
| Specification | Thepolyimidediaphragmisnotsuitforwaterifcustomeristousethepressreswitchinwaterpleasecontactthefactory | |||||
| MODEL | LF20H | |||||
| Media | Air,water,motor oils,transmission oils,jet fuelsand other similar Hydrocarbon Media | |||||
| Pressure SetPoint | Factory set from10 to 400psi | |||||
| MaxOperating Pressure | 500 psi | |||||
| Proof Pressure | 2000 psi | |||||
| Burst Pressure | 4000 psi | |||||
| Opeating Temperature Range | -40℃to +120°℃ | |||||
| Switch Type | Direct action,blade contact | |||||
| Electric Rating | Resistive:15AMP-6VDC、 8AMP-12VDC、4AMP-24VDC | |||||
| Inductive:1AMP-120VAC、0.5AMP-240VAC | ||||||
| ContactArrangement | SPST-NO,NC,SPDT | |||||
| Terminal | #8-32screws,1/4"blade,Metri-Pack | |||||
| Connection | 1/8"NPTMale,1/4"NPTMale,G1/8"Male,G1/4"Male | |||||
| Contact:Silveralloy,gold plated;Base:Plated Steel;Cover:Glaee reinforced polyester Diaphragm:Polyimide film(othermaterials isoptional according to media) | ||||||
| Options | ||||||
LF20-V Vacuum Pressure switch
LF20-V vacuum switch is specifically designed to stand up to extended duty applications. This switch is factory set.It features a fluorosilicone rubber diaphragm for compatibilitywithawidevariety of fluids,and various terminations including a MetriPack connector that forms a tight seal when connected.Among the outstanding design benefits areits durable construction,compact size,and enhanced set point integrity.
| Number | Prointurenget | Circuitry | BaseMaterial | Connection | Terminals | Cover |
| 0 | ！ | / | / | none | ||
| 1 | -3.7~-27kPa±4kPa，1.1~8"Hg，±1.2"Hg) | BSPST-NC | Cbarss | D1/8NPT | E1/4blade | FcoverA |
| 2 | -30~-57kPa±6.7kPa,9~17"Hg,±2"Hg) | SPST-NO | plated steel | 1/4NPT | #8-32screws | cover B |
| 3 | -60~-75kPa±10kPa，18~22"Hg,±3"Hg) | SPDT-NO-C-NC | stainlesssteel | R1/8 | wire leads | / |
| 4 | A | SPST-NO(adjustable) | / | R1/4 | / | / |
| 5 | / | SPDT-NO-C-NC(adjustalble) | / | G1/8 | / | / |
| 6 | / | / | / | G1/4 | / | / |
| Specification | ||||||
| MODEL | LF20-V | |||||
| Media | Air | |||||
| Pressure SetPoint | Factory set from 1.1 to 22 in/Hg vacuum | |||||
| MaxOperatingPressure BurstPressure | 30 in/Hg vacuum 150 psi | |||||
| Opeating Temperature Range | -40℃ to +120°℃ | |||||
| Switch Type | Directaction,blade contact | |||||
| Resistive:15AMP-6VDC、8AMP-12VDC、4AMP-24VDC | ||||||
| Electric Rating | Inductive:1AMP-120VAC、0.5AMP-240VAC | |||||
| ContactArrangement | SPST-NO,NC | |||||
| Terminal | #8-32screws,1/4"blade,Metri-Pack | |||||
| Connection | 1/8"NPT Male,1/4"NPT Male,G1/8"Male,G1/4"Male | |||||
| Material | Contact:Silveralloy,gold plated;Base:Plated Steel; | |||||
| Cover:Glaee reinforced polyester;Diaphragm:Fluorosilicone elastomer | ||||||
| Options | Various base connector sizes,wire leads(potted &sealed) | |||||
LF201 Pressure switch
TheLF20 pressure switch is specifically designed to stand up to extended duty applications.This switch is factory set but capable of fieldadjustment. It features different diaphragms for compatibilitywithawide variety of fluids,and various terminations including a Metri-Pack connector that forms a tight seal when connected.It can be widely used for pool and spa,antiskid braking systems,water pump systems,and dental aircompressors,heavy construction,off road equipmentsand other pressure control systems.
Specification
| Model | LF201 |
| Media | Oils |
| PressureSetPoint | 70psi |
| Thread Specification | 1/2-20UNF Plated Steel |
| TemperatureRange | -40°C~120°℃ |
| ContactArrangement | NO-C |
| Terminal | M4Thread Terminal |
| Proof Pressure | 2000psi |
| BurstPressure | 4000psi |
LF25 Steam pressure switch
LF25 pressure switch is designed for control pressure with higher current capacity. It is widely used in steam cleaner，steam sadiron and other pressure control system.It provides SPST or SPDT contact form and switch deadband (also referred to as mechanical differential or hysteresis).LF25 switch utilize highquality miniature snap-action switches. The switchis diaphragm operated.Duringthe developmentofa specification,actuation point can beadjusted by the designer. In production,factory seting is required.
| Number | Pressure Range | Connectione Type | Electrical Rating | Maxmprerating |
| 1 | 0.2-0.6bar | B1/8NPT | C16A,125-250VAC | D85 |
| 2 | 0.5-1.0bar | G1/8 | 22A,125-25VAC | 125℃ |
| 3 | 1.0-2.5bar | R1/8 | / | / |
| 4 | A2.0-4.0bar | 1/4NPT | / | / |
| 5 | 3.0-7.0bar | G1/4 | / | / |
| 6 | 5.0-9.0bar | R1/4 | / | / |
| Model LF25 | ||||||
| Media | Non hazardous gas,liquid orsteam | |||||
| OperatingPressure | 0.2-0.6bar | 0.5-1.0bar | 1.0-2.5bar | 2.0-4.0bar | 3.0-7.0bar | 5.0-9.0bar |
| Proof Pressure | 3bar 3bar | 10bar | 10bar | 10bar | 10bar | |
| Opeating Temperature Range | +125C Max imum | |||||
| Contact Arrangement | SPSTorSPDT | |||||
| ElectricRating | SPST or SPDT/Normal Close:16(4)-250vAC (other ratingsare available if necessary) | |||||
| Terminal | 6.3or4.8mm male Q.C. Insulationcoverisavailableif necessary | |||||
| Connection | 1/8NPT-27 or1/4NPT-18 Male (other connection is optional) | |||||
LF30 Airdifferential pressure switch
The LF30employsadifferential pressure to actuatea precision snap switch at chosen pressure seting.This may be the difference between atmospheric and a negative or positive pressure or betweenany two given
LF30 OrderRef NO
| pressures.When a change of pressure occurs between LF30-4111 -P70Pa-100Pa the negative pressure chamber and the positive pressure | |||||
| chamber the main diaphragm activates the snap switch at a pre-determined value. | ABCD Pressure seting in pa:P=Positive V=Vacuum ON:100Pa OFF:70Pa | ||||
| Number | Electiral Rating | Terminals | Mounting/Fixing | ||
| 0 | / | / | none | ||
| 1 | 0.1A,125/25VAC | B6.3×0.8mm | Cwith bracket | ||
| 2 | 3A,125/250VAC | 4.8×0.5mm | / | ||
| 3 | 5A,125/250VAC | / | / | / | |
| 4 | A15A,125/250VAC | / | / | / | |
| Specification | |||||
| Model | LF30 | ||||
| Medium | Air, smoke (smoke after combustion of gas), non-corrosive gas | ||||
| Fixing method | L-shapedbracket | ||||
| Installation | LF30shouldbe installedwithdiaphragm inverticalplace,Pleasecontactusbeforeyou instalit horizontaly. 35~1000Papositive and negative pressure range,the min upperlimit pressure is 35Pa,the min lowerlimit | ||||
| Pressure range | pressure is6Pa,and pressure difference isnotadjustable | ||||
| Pressure resistance Operatingtemperature | 5000Pa | ||||
| ≤105°℃C 0.1A,5A,16A,125/250VAC | |||||
| Rated voltage,current Contact method | SPDTorSPST | ||||
| Terminal | 6.35×0.8or4.8×0.5standardflatblade | ||||
| Tolerance | At room temperature,the toleranceis±10Paor±10%Pa,whichever is greater | ||||
LF31A Airdifferential Pressureswitch
LF31AOrderRefNO LF31A-SVD2I50Pa
LF31A switchesoffer pressure,vacuumand differential models capable of sensingvery low setpoints,and switching current up to 5A resistive,2.5A inductive. Designed for use in the HVAC industry,wherereliable airprovingiscritical to both performanceand customersafety.The LF31A isa favoritewith leading manufacturers of gas-fired warm air furnacesand water heaters.
| AContactMaterialBActuationMean | C Contact E | Directionof ActuationPressure | FSetPoint | GUnitActuationPressure Abbreviated | |
| S=Silver | V=Vacuum | S=SPST-NO | I=Increasing | 20-10000 | Pa |
| G=Gold | P=Positivepressure | C=SPST-NC | D=Decreasing | inW.C. | |
| D=SPDT | mbar | ||||
| inHg |
| D=SPDT | mbar | |
| inHg | ||
| etc | ||
| DShapeand Vent Hole | ||
| g= Positive presureend:neutral,hexagonalandradialiterface,negative pressureend: hexagonalandradialinterface | ||
| Specification | ||
| LF31A | ||
| Media Operating Pressure Range | Air,products of combustion or natural gas | |
| Mounting Position | 0.08inW.C. to 34in W.C. | |
| Proof Pressure | DiaphragminanyverticalPlane | |
| Burst Pressure | 100in W.C.(3.6psi) | |
| Operating Temperature | 5psi Minimum -40°Cto+85℃ | |
| Contact Arrangement | SPSP or SPDT | |
| Electrical Rating | Curret:ce:imiamimlishmsistive)maxmimum(finesiveraloy contcts) | |
| Termimnal | 15mA minimum,0.2A maximum(gold-platinum-silveralloy contacts) | |
| Connection | 6.3mm copper alloy | |
| Φ6.4mm for tube connection | ||
LF32 Airdifferential Pressure switch
The LF32isanadjustable differential pressure switch capable of detectingminiscule changes in pressure due to the size and proven design. The switch set point or switching point can be field adjustable without the need of a manometer by simply using the adjustment knob and the built in calibrated visual scale.Thisswitchisequippeda clear cover thatnot onlyprotects the adjustment knob to be move involuntary but also provides class IP54 protection
| Model | Pressure Range | Differential | Tolerances |
| LF32-02 | 20-200(Pa) | 10(Pa) | ≤±15%,min±10Pa |
| LF32-03 | 30-300(Pa) | 10(Pa) | ≤±15%,min±10Pa |
| LF32-03A | 20-300(Pa) | 10(Pa) | ≤±15%,min±10Pa |
| LF32-04 | 40-400(Pa) | 20(Pa) | ≤±15%,min±10Pa |
| LF32-05 | 50-500(Pa) | 20(Pa) | ≤±15%,min±10Pa |
| LF32-05A | 30-500(Pa) | 20(Pa) | ≤±15%,min±10Pa |
| LF32-06 | 60-600(Pa) | 20(Pa) | ≤±15%,min±10Pa |
| LF32-06A | 40-600(Pa) | 20(Pa) | ≤±15%，min±1Pa |
| LF32-10 | 200-1000(Pa) | 100(Pa) | ≤±15% |
| LF32-11 | 100-1000(Pa) | 50(Pa) | ≤±15% |
| LF32-15 | 100-1500(Pa) | 50(Pa) | ≤±15% |
| LF32-20 | 200-2000(Pa) | 100(Pa) | ≤±15% |
| LF32-25 | 500-2500(Pa) | 150(Pa) | ≤±15% |
| LF32-45 | 500-4500(Pa) | 250(Pa) | ≤±15% |
| LF32-50 | 1000-5000(Pa) | 250(Pa) | ≤±15% |
| Specification | |||
| MODEL | LF32 | ||
| Media | Air,non-combustible and ono-aggressive gass | ||
| Max Operating Pressure | 10kPa | ||
| Mounting Position | Diaphragminany vertical Plane | ||
| Degree of protection | IP54(with cover),IPoo(without cover) | ||
| OperatingTemperature | -40℃to+85℃ | ||
| ContactArrangement | SPDT | ||
| Electrical Rating | Resistance:initaial100milliohms Current:1.5A(0.4A)/250V | ||
| Termimnal | 6.3mm ×0.8 blade orscrew terminal | ||
| Connection | Φ6.4mm for tube connection | ||
LF35 Airdifferential Pressure switch
| to sense positive, negative or differential air pressure. | ||
| AOperatingPressure:1=0.5mbar-30mbar;2=0.2mbar-5.0mbar | ||
| BConnection:1=accept0.25"ODrigidorsemi-rigdtubing;2=Male0.25"silp-onconnectors,suitableforflexibletubing | ||
| CMounting/Fixing:A=BracketA;B=BracketB | ||
| DWire Protecting:0=None;1=with protecting on closure | ||
| Specification | ||
| MODEL | LF35-1 | |
| Media | Air | |
| Mounting Position | Diaphragm inany vertical Plane | |
| FieldAdjustable Range | 0.5±0.05mbarto30.0mbar Progressive,increasing fromapproximately | 0.2±0.05mbarto5.0mbar Progressive,increasing from approximately |
| Switch Differential | 0.05mabr at minimum set point,to approximately 2.0mbar at maximum set point | 0.05mabr at minimum set point,to approximately 0.25mbar atmaximumsetpoint |
| Maximum Pressure | 30mbar | |
| Operating Temperature Electrical Rating | -40°℃~+82°℃ | |
| 300VA pilot dutyat115-277VAC,10A,non-inductive,277AVC | ||
| Connection | Ferrule and nut compression type connectors that accept 0.25"OD rgid or semi-rigid tubing;male 0.25"slip-onconnector | |
| ContactArrangement | SPDT | |
LF37
LF37 diaphragm pressure switch isavailable for various sumps,effluent,and sewage application to control the liquidlevel.Variousswitch settingsareavailable for to turn-on or turn-off the pump.The diaphragm pressure sensing designmakeit morereliable than traditional float ball mechanism. Port connection design make it cansense the pressure without immersing the liquid directly.
LF37OrderRefNO
| LF37 -111 -4.5"-6"H2O |
ABC Pressure setting:cut in :6"H2O ; cut off:4.5"H2C
| Number | Connection Type | ContactArrangement Enclosure | |
| 0 | none enclosure | ||
| 1 | A Diaphragm | Cwith enclosure | |
| 2 | Φ6mm for tube | ||
| 3 | 1/4NPT | / | |
| Specification | |||
| Model | LF37 | ||
| Media | Air,water or other non-hazardous liquid | ||
| Basic function | Diaphragm Pressure switch operation:provide water level signals to appliance control,level value can be set on customer request | ||
| Pressure Range liquild level Range | 2~60 in W.C. | ||
| Proof Pressure | 5psi | ||
| ContactType | SPDT,SPST-NC/NO 12/13.8A,125VAC | ||
| Electrical Rating | 10A,250VAC 1/2HP,125/250VAC 3/4HP,125/250VAC | ||
| Ambition Temperature | 40℃ | ||
| Terminal | 6.3×0.8blade | ||
LF40-01 Air actuated pressureswitch
LF40-01 is provided with a snap action switching for higher current capacity,SPDT contact form and switch deadbands. It can be used together with air button for
| LF40-01OrderRefNO | remote control purpose,which is widely used in food waste disposer,pumps for swimming poolsand spas, hot tubs,sanitary equipment,medical equipment etc. sedasa remote control,LF40-01 has twoactions, omentary action and Alternate action. | ||
| LF40-01-1M131 -3psi B CD Set Point(psi):3psi | |||
| A Action Type:M=Momentary action;A=Alternate action | |||
| Number Connection Type | Body Color | ElectricalRating Terminal | |
| 1 | A 4mm OD tube side entry | Bwhite | 0.1A,125/250VAC D 0.25inch blade |
| 2 | 4mmOD tube+NPT1/4connection bottomentry | black | 3A,125/250VAC 0.187inchblade |
| 3 | 1/8NPT bottom entry | / | C5A,125/250VAC PCB |
| 4 | 1/8NPT+4mm OD metal tube | / | 15A,125/250VAC / / |
| 5 | / | 16A,125/250VAC | |
| 6 | / | 21A,125/250VAC / | |
| Specification | |||
| Model LF40-01 | |||
| Media | non hazardous gas or liquid | ||
| Operating Pressure Range | 0.25~15psi formomentaryaction;1.0~1.8psi for Alternateaction | ||
| Proof Pressure | 50psi | ||
| OperatingTemperature Range ContactArrangement | -10℃ to +85℃ | ||
| SPSTorSPDT 0.1A,125/250VAC；15A,125/250VAC | |||
| Electrical Rating Terminal | 3A,125/250VAC；16A,125/250VAC 5A,125/25VAC；21A,125/5 | ||
| Connection | 6.3 or 4.8mmmale Q.C Inlet4.0mm for tube connection(Optionall/8"NPT or other fitingsare available) | ||
LF40-B Pressure switch
LF40-B isprovided with a snap action switching for higher current capacity, SPDT contact form and switch deadbands.Itcan be used together withair button for remote control purpose,which iswidely used in food waste disposer,pumps for swimming pools and spas, hot tubs,sanitary equipment,medical equipment etc.
Specification
| Model | LF40-B |
| Goodair tightness | There should beno leakage under 50 psi pressure |
| Pressure range | |
| Service life | >40000 times |
| Electrical performance | 10A,125/250V |
| Wiring form | 6.3×0.8 mm blade terminal |
| Electrical circuit | NO-C |
| Operating temperature | -10°℃~85°℃C |
| Socketandcable | GB,power cord length 1200mm |
| Air tube | 06mm tube,length1000mm |
LF40-Cisprovided witha snap action switching for higher current capacity，SPDT contact form and switch deadbands. It can be used together with air button for remote control purpose,whichiswidely used in food wastedisposer,pumps for swimming poolsand spas, hot tubs,sanitary equipment,medical equipment etc.
| Model | LF40-C |
| Action type | Alternateaction |
| Pressurerange | |
| Electricalcircuit | NO-C |
| Air tube length | Black PVC air tube length1m |
| Electricalperformance | 8A125VAC |
| Operatingtemperature | -10℃~60°℃ |
LF55 Pressureswitch for Refrigerationsystem
Lf55 pressure switch is an automatic control device that receives pressure signals and actuates. It is usually used to control the start andstop of compressors and fans in refrigeration systems.It can also be used in waterpumps,fire protection,boilers,hydraulics, ironing and other devices as a safety protection.
| Model | Pressure | PDifurentange | Mrorking | Model | Pressure | PrDiferentange | |
| 02 | -0.5~2 | 0.2~0.7 | 10 | 16 | 3~16 | 1~4 | 17 |
| 03 | -0.5~3 | 0.35~1.5 | 10 | 20 | 5~20 | 2~5 | 35 |
| 06 | -0.5~6 | 0.6~4 | 17 | 30D | 8~30 | 3~10 | 35 |
| 08 | -0.2~7.5 | 0.7~4 | 17 | 32 | 8~32 | 2~6 | 35 |
| 10 | 1~10 | 1~3 | 17 | 42 | 8~42 | 4~10 | 46.5 |
| 14 | 2~14 | 1~4 | 17 |
LF55OrderRef NO
| LF55-08_A W L-3bar/2bar | |||||
| 12345 | setpoint |
| 1Model | 2ResetMethod | 3ConnectionType | 4CoverColor | 5Bracket |
| 02 | None=auto reset | A=7/16-20male | W=white | No = no bracket |
| 03 | M=Manual reset | B=G1/4male | B=Blue | L=L type bracket |
| 06 | C=NPT1/4male | |||
| 08 | D=R1/4male | |||
| 10 | E=G1/4female | |||
| 14 | F=NPT1/4female | |||
| 16 | G=R1/4female | |||
| 20 | H=M12*1.25male | |||
| 30D | l= copper pipe forwelding | |||
| 32 | ||||
| 42 |
| General Value | |
| Medium | R22，R134a,R404A，gas,etc. |
| ContactMethod | SPDT |
| ElectricalParameters | 240VAC/FL8ALR48A 120VAC/FL16ALR72A |
| ContactMaterial | Silveralloy |
| Temperature Range | Ambienttemperature-20~65CMedium temperature-40~120°C |
| Withstand Voltage | 2000Vfor1minutewithoutbreakdown |
| Maximum MountingTorque | 2N·m |
| Cable Connection | 6-14mm diametercable gland |
| IPLevel | Ip20 IP44(with bracket) IP55 |
LF55V Vacuum pressureswitch
| NumberA Reset Type B Connection TypeC Connection specifications D Cover color E Bracket type | |||||
| 1 Automatic reset Male | 7/16UNF(1/4SAE) | White | Lbracket | ||
| 2 manualreset | Female | G1/4 Blue | Flatbracket | ||
| 3 | R1/4 | Ubracket | |||
| 4 NPT1/4 | None | ||||
| 5 | M12*1.25 | ||||
| Specification | |||||
| General Value | |||||
| Pressureanddifferential range | Pressure range:-1-0bar,Differential:-0.15-0.5bar | ||||
| Mediium | R22/R134a/R404A/air/liquidetc | ||||
| Connection material | Nickel plated copper,Other materials such as stainless steel which need to be customized. | ||||
| Contactarrangement | SPDT | ||||
| Electricalrating | 240VAC/FL8ALR48A 120VAC/FL16ALR96A | ||||
| Contact material | Moving contact:silver plated; Static contact: allsilver | ||||
| Environmenttemperature | -20~65C | ||||
| Mediumtemperature | -40~120°℃ | ||||
| Protection grades | Ip20&IP44(with bracketand cover)lP55(with protection cover) | ||||
| Maximumworkingpressure | 3bar | ||||
| Voltage withstand | No Breakdownat 2000V for1minute | ||||
| Cable interface | 6-14mmdiametercable sealing interface | ||||
LF55V pressure controller isa kind of pressure protection device specially designed for vacuum pressure control of refrigeration or other mechanical systems to prevent the fault caused by air leakage into the system when the degree of vacuum is too low in the system.It is akind of dynamic controller which acts by receiving the pressure signal.In the refrigerationdevice,when the low pressure end of the compressor is lower than the set pressure valuethe pressure controller will send an electrical signal to cut off the circuit and stop the compressor for safety protection.This pressure controller is not only suitable for refrigerant but also for controlling pressure of gas,water,and oil.The internal
LF55E Pressure switch
LF55E series pressure switchs are used to control the pressure of compressorin refigerant system. It is usually used in alarm and regulation system offactory,diesel plant,compressor,power station andship.Theswitchcanmeettheneedsofmost outdoor and indoor applications.The switch meets the requirements of high protection
| Model | LF55E |
| Electrical Function | 240VAC/FL8ALR48A,120VAC/FL16ALR96A |
| Working Pressure Range | Checkchartabove |
| ContactMaterial | Silver alloy |
| IPGrade | IP67(same IP cable should be used) |
| EnvironmentalTemperature | -25C/+65C |
| Medium temperature | -40°℃/+120°℃ |
| Cableinterface | 6-14mmdiameter cable sealing interface |
| Model | Range | Differential | Pressure MAX Operating | Model | Range | Differential | MAX Operating Pressure |
| 02 | -0.5~2 | 0.2~0.7 | 10 | 16 | 3~16 | 1~4 | 17 |
| 03 | -0.5~3 | 0.35~1.5 | 10 | 20 | 5~20 | 2~5 | 35 |
| 06 | -0.5~6 | 0.6~4 | 17 | 30D | 5~30 | 3~10 | 35 |
| 08 | -0.2~7.5 | 0.7~4 | 17 | 32 | 8~32 | 2~6 | 35 |
| 10 | 1~10 | 1~3 | 17 | 42 | 8~42 | 4~10 | 46.5 |
| 14 | 2~14 | 1~4 | 17 |
LF55EOrderRefNO
| grade,low return difference,robustand compact design and shock resistance. | LF55E-1110.7/0.4 | |
| ABC | Action pressure:-0.7bar,Reset pressure:0.4bar | |
| A Number | B Reset Type | CConnection Specifications |
| Reference Model list | Automaticreset | 7/16UNF(1/4SAE) |
| Manualreset | G1/4 | |
| R1/4 | ||
| NPT1/4 | ||
Specification
LF55T Thermostat
| TemperatureRangeC | TemperaturedifferencerangeC | Setting temperatureC |
| -30~15 | 2-10 | -7/-9 |
| -5~30 | 2-10 | 10/7 |
Specification
LF55Tare used for regulation,but can also be seenin safety monitoring systems.They areavailable with vapor charge or with adsorption charge.With vapor charge the differential is very small.The LF55T Thermostatswith adsorption charge are widely used to give frost protection.
| Modle | LF55T |
| Contactagreement | SPDT |
| Electrical rating | AC15:10A,240V;DC12W,220V;Contact resistance≤500mΩ |
| Contact material | static contact:finesilver,movable contact:Silver plated |
| Breakdownvoltage | oneminat2oo0vnobreakdown |
| Protection grade | IP30 (IP44whenwithbracketandcover) |
| Environment Temp | -25℃/+65℃ |
| Media Temp | -40℃/+120℃ |
| Mechanicallifespan | 100ktimes |
| Electricallifespan | 30Ktimes |
| Maxinstallation torque | 2 N/M |
| Capillary | Φ2.5,The minimum contacting length ofthecapilaryand environment: 0.43m,Capillry lengthcan becustomized |
| Cable connection | Φ6-14cable |
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LF58 Pressureswitchfor Refrigeration system
Automaticreset High pressure manual reset Highand low pressure mε MAX:50VA MAX:50VA MAX:50VA 4 B B Low Pressure Side High Pressure Side Low Pressure Side High Pressure Side Low Pressure Side High Pressure Side Pressure Drop Pressure Rise Pressure Drop Pressure Rise Pressure Drop Pressure Rise
LF58 pressure switch is an automatic control device that receives pressure signals and actuates. It is usually used to control the start and stop of compressors and fans in refrigeration systems. It can also be used in water pumps,fire protection,boilers, hydraulics,ironingand otherdevicesasasafety
| Model | Low Pressure Side | High Pressure Side | ||||
| Pressure | Prertel | Woe | Pressure | |||
| 32 | -0.2~7.5 | 0.7~4 | 17 | 8~32 | 4 | 35 |
| 45 | 2~12 | 1~4 | 17 | 8~45 | 7 | 48 |
LF58OrderRefNO
| tydi asalety protection. | LF58 -32 | N A W | L-3bar/2bar-20bar | |
| 123456 Low setpointHigh setpoint | ||||
| 2Resetmethod 3Protectionclass4ConnectionType5covercolor 6bracket | ||||
| 1model 32 | None=auto reset | N=IP30 A=7/16-20male | ||
| 45 | HM=Highpressuremanual reset H=IP44 | |||
| HLM=High and low pressure manual reset P=IP55 | B=G1/4male B=Blue P=flattype bracket H=M12*1.25male | |||
| L=L type bracket I=copperpipeforwelding U=U-shapedbracket | ||||
Specification
| General | Value |
| Medium | R22,R134a,R404A,g,c. |
| Contactmethod | SPDT |
| Electrical parameters | 240VAC/FL8ALR48A 120VAC/FL16ALR72A |
| Contactmaterial | Moving contact:covered withsilver;Static contact: full silver |
| Temperature range | Ambienttemperature-20~65°CMediumtemperature-40~120C |
| Withstand voltage | 2000Vfor1minutewithoutbreakdown |
| MaximumMountingTorque | 2 Nm |
| Cableconnection | 6-14mmdiametercablegland |
LF5D Oildifferential Pressure switch
| Model | Pitetal | Fatnry | |
| 2 | 0.5~2 | 0.5 | 17 |
| 4 | 0.5~3.5 | 1 | 17 |
| 4H | 0.5~3.5 | 1 | 35 |
| 6 | 1~6 | 1 | 17 |
| 6H | 1~6 | 1 | 35 |
LF5DOrderRefNO
The LF5D differential pressure switch isa protectivedevice forrefrigerationcompressors or pressure lubrication of other mechanical. In therefrigeration system,the switch receivesthe two pressure signals of the discharge pressure of the lubricating oil pump and the suction pressure of the compressor,and maintainsa certain range of difference between these two pressures,and when the difference is smaller than the set value,the switch will actuate immediately to automatically cut off the
| LF5D -2 | A | W | L- | 1bar | Immedlately to automaticaly | Cut the compressor circuit and stop the compressor, Ol | |||
| 12345 | set point | thus protecting the compressor. | |||||||
| 1model 2 Resetmethod 3 Connection Type | 4covercolor | 5bracket | |||||||
| 2 | None=autoreset | A=7/16-20male | W=white | no = no bracket | |||||
| 4 | M=Manualreset | B=G1/4male I=M12*1.25 male | B=Blue | P=flattypebracket | |||||
| 6 | L=L type bracket | ||||||||
| 4H | U=U-shaped bracket | ||||||||
| 6H | |||||||||
| Specification | |||||||||
| General Value | |||||||||
| Medium | R22,R134a,R404A,gas,etc. | ||||||||
| Contact method | SPDT | ||||||||
| Electrical parameters | 240VAC/FL8ALR48A | 120VAC/FL16ALR72A | |||||||
| Contact material | Silver contact | ||||||||
| Temperature range | Ambienttemperature-20~65C Medium temperature-40~120C | ||||||||
| Withstand voltage | 1500Vfor1minutewithoutbreakdown | ||||||||
| MaximumMountingTorque | |||||||||
| Cableconnection | 2N·m 6-14mmdiametercable gland | ||||||||
LF56 Pressureswitch
LF56series pressure switches are mainly used to control pressure of boiler orwater tower regulating system.When the system pressure exceed the setting point，the switch will cut off the circuit for protection.With SPDT contact arrangement, LF56 switch can detect the pressure change and shift the internal status accordingly to control the on/off of external circuits,which isavailable for the pressure control, limit and alarm of non-hazardous liquid, gas and steam.
| ModelNumber | Operating Ranges | Subtractive Differential | Maximum Diaphragmpressure | |||
| kPa | psi | kPa | psi | kPa | psi | |
| LF5615 | 15-100 | 2-15 | 15-40 | 2-6 | 170 | 25 |
| LF5650 | 35-350 | 5-50 | 40-100 | 6-14 | 590 | 85 |
| LF56150 | 70-1035 | 10-150 | 70-150 | 10-22 | 1550 | 225 |
| LF56300 | 140-2070 | 20-300 | 140-345 | 20-50 | 2410 | 350 |
| MODEL LF56 | |
| Contactarrangement | SPDT |
| Workingmedia | Standardmodelorolateiam，quddtorosiemioitainngliuidrelble |
| Ambienttemperature | -29°℃~66°℃ |
| Media Temp | -40°℃~180oCnon-frozencondition |
| Pressure Diaphragm | stainless steel |
| ThermalMaterial | brass |
| Connection | NPT1/4、G1/4、R1/4 |
| Electrical Rating | FLA 5.1A/240VAC, 8.0A/120VAC; LRA:30.6A/240VAC, 48.0A/120VAC |
Installation dimension (mm)
LF52 Differential Pressure switch
| Adjustable | Model | Differentialpressure adjustable range kPa | Differential | Lapincrement |
| Single SetPoint Working Pressure range | 52-15 | 5-15 | 2~6 | 1 |
| 52-30 | 5-30 | 2.2 | ||
| 52-70 | 6-70 | 5.5 | ||
| 52-100 | 6-100 | 6.5 | ||
| 52-200 | 10-200 | 16 | ||
| 52-300 | 20-300 | 25 | ||
| Dual SetPoint Working | 52-400 | 30-400 | 5~10 2~6/5~10 | 38 |
| 52-30/100 | 5- -30/6-100 | 2.2/6.5 | ||
| 52-70/100 | 6-70/6-100 | 5.5/6.5 | ||
| 52-100/100 | 6-100/6-100 | 6.5/6.5 | ||
| 52-100/200 | 6-100/10-200 | 2~6/5~10 | 6.5/16 | |
| 52-200/200 | 10—200/10-200 | 5~10/5~10 | 16/16 | |
| 52-300/300 | 20-300/20-300 | 25/25 | ||
| 52-400/400 | 30- 400/30- 400 | 38/38 |
Product introduction:
Thisadjustable differentialpressure switch LF52is eveloped forsparinglyusing indifferent differential value requirements.Itiswidelyapplied fordetectingthe differential of water filter,pump,heat exchanger,chillers andits coil units.When the water flowing (differential) decrease or increase to the setting point,there will be an alarmor cut off output signal for the self-controlling system.It'salsoavailable forindicatingthe statusof pumpor water filter. Double differential setings pressure switch cantake the replacement of the vane flow switch andavoid changing the vane flow switch fromchillers each year.
Asingle set point isa high/low limit that controlsthe differential pressure between the frontand rear endsof asection of pipeline.The double set point isto control the high and low limit of the pressure difference between the frontand rear ends of a pipeline,and can also control the high/low limit of the pressure difference between the front and rear ends of the two pipelines.
| LF52SeriesOrderRefNO LE52-A-B-C-D Reference standard: | 1.UI508 2.GB14048-2000 (Low voltage switchgear and control equipment general provision) 3.GB14048.5-2000(Lowvoltageswitchgear and control equipment,part 5-1Control equipment and switching elements) 4.ROHS certificate. | |||
| AProductset point | BJointthread | CInstructions | DWiringprotection | |
| Singleset point | 7/16"UNFsingleconnector(Malethread) | Chinese/English | Plastic Gland Pg16 | |
| Doubleset point | G1/4single connector(female thread) | Chinese English | Nickel plated at brassGland Pg16 | |
| G1/4 double connector (female thread) | ||||
| Specification | ||||
| General Value | ||||
| Media | Non hazardousmedia such as water,air,oil etc... | |||
| Contactarrangement | One/two sets of SPDT (microswitch) | |||
| Electricalrating | 3A250VAC 5A 125VAC | |||
| Storage temperature | -29~82°C | |||
| Ambienttemperature | -20~71°C(fluid) | |||
| Media temperature | -20~93°C(fluid) | |||
| Highand low pressure connections | 7/16UNF single connector(Male thread);G1/4 single connector(female thread); G1/4 double connector (female thread) | |||
| Maximumstaticpressure | 16bar | |||
| Maximumdifferential | 10bar | |||
| Settingrepeatabilitytolerance | ±1% | |||
| Degree of protection | Ip54 | |||
| Accessoriesare optional (if there is norequirement,thedefaultisselected) | Converted capillary, plastic/metal/rubber/line card, manual in Chinese/English | |||
LF52A Differential Pressure switch
(1) Product overview:
LF52A series pressure switch isan adjustable differential pressure switch.
It isdeveloped for applications that are used in small quantities and have different requirements for differential pressure values. It isan alternative to paddle flowswitches.Avoid the disadvantage that the chiller needsto replace the paddle flow switch every year. When the water flow (differential pressure) in the system rises or falls to the set value,it will output an alarm or cut-off signal to the automatic control system.
The unique small size of LF52A can cope with various narrowinstallation environments.At the same time,take into account the quality and reliability,and give full play to the product performance.It is widely used in engineeringto detect the pressuredifference of water filters,pumps,heat exchangers and other chillers and coils. Can also be used to indicate the status of a pump or water filter.
(2) kererence stanaara:
1. UL508
2.GB14048-2000 “General Rules for Low-Voltage Switchgearand Control Equipment";
3.GB14048.5-2000"Low-voltage switchgear and control equipment - Part 5-1 Control electrical appliances and switching elements-Electromechanical control circuit electrical appliances"
4.ROHS certification
Specification
| Adjustable | Model | Ddijusrentil angsurae | Return difftence | One turnvariation |
| working pressure | 52A-15 | 5-15 | 2~6 | 1 |
| 52A-30 | 5-30 | 2.2 | ||
| 52A-70 | 6-70 | 5.5 | ||
| 52A-100 | 6-100 | 5~10 | 6.5 | |
| 52A-200 | 10-200 | 16 | ||
| 52A-300 | 20-300 | 25 | ||
| 52A-400 | 30-400 | 38 |
LF52A SeriesOrderRefNO
| LF52A-30-1-1-1-1-15kpa | |||
| ABCD setpoin | |||
| CodeAConnectorMateriaBConnectorThread | CInstructionManual DWiringProtection | ||
| 1 | Brass | 7/16"UNFFEMALE | Chineseand English PlasticGland PG9 |
| 2 | SS316L | 7/16"UNFMALE | Chinese |
| 3 | R1/4" MALE | English | |
| 4 | G1/4"MALE | ||
| 5 | 1/4"NPT MALE | ||
| 6 | connectp8softtube | ||
| 7 | connect p6 steel pipe | ||
| General | Value |
| Medium | Water,air,oiland other non-corrosive medium |
| Contact | Single group SPDT (microswitch) |
| Electrical Specifications | 3A250VAC 5A125VAC |
| Ambienttemperature | -20~71C |
| Mediumtemperature | -20~93°C(fluid) |
| Maximumallowable static pressure | 16bar |
| Maximum allowable differential pressure | 10bar |
| Set point repeatability deviation | ±1% |
| Protectionclass | IP54 |
| Accessoriesare optional (default if not required) | Converted capillary |
LEFOO
Features
Max liquid pressure:1 MPa,can be used in multiple applications.
There are 3 stainless steel paddles,can be used in 25 to 7 5mm diameter pipe.
Number of paddlesis changeable and length of paddle is trim-able according to customerrequirements.
With additional 6"paddle,FS series liquid flow switch can be used in 100 to 150mm diameter pipe.
Adjustable flow setting,Users can set the flow value according to their requirements. For user convenience,FS52 flow switch has large room for wiring.
FS51/FS52 can also be provided with stainless steel connection,which is suitable for ammonia and other medium.
Application
The typically application is used to protect the cooling system,when the cooling water is off,FS flow switch can shut off the compressor current efficiently in order to protect the freezer and entire system from being damaged.
Performance Parameter
Electric load: AC250V 10A Max working pressure: 10.34Bar Flow temperature: 0-120℃ Environment temperature: 0-60℃ The endurance of bellows: 500000 cycles Ingress protection: IP53
Specification (FS flow switch)
FS5 Series
Liquid flow switch
FSseries liquid flow switch is designed for managing the flow changeswhen the liquid flows inthe pipe，suchaswater，ethylene glycol or other non-hazardous liquids.When the liquid flowishigher or lower than the settingvalue, the single-pole double- throw contacts (SPDT)can get throughonecircuitandatmeantime to break the other circuit.FS series liquid flow switch is commonly used for chain reaction or “no flow" protection.
| Actuate flow(m³/h) | |||||||||||||||
| PipeDiameter(mm) | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 100* | 125* | 150* | 200* | |
| Min Adjus tment | Flow iner blue closed) | 0.95 | 1.32 | 1.70 | 3.11 | 4.09 | 6.24 | 14.8 | 28.4 | 43.2 | 85.2 | 8.4 | 12.9 | 16.8 | 46.6 |
| Flow dedryellow closed) | 0.57 | 0.84 | 1.14 | 2.16 | 2.84 | 4.32 | 11.4 | 22.9 | 35.9 | 72.7 | 6.13 | 9.31 | 12.26 | 38.6 | |
| Flow ined blue closed) | 2.0 | 3.02 | 4.36 | 6.6 | 7.84 | 12.0 | 29.1 | 55.6 | 85.2 | 172.6 | 13.4 | 26.8 | 32.7 | 94.26 | |
| Adjus tment | Flow dredyellew closed) | 1.93 | 2.84 | 4.09 | 6.13 | 7.23 | 11.4 | 27.7 | 53.4 | 81.8 | 165.8 | 17.3 | 25.21 | 30.66 | 90.85 |
Installation
1.Pipe connection:FS series flow switch be provided with 1", 1 / 2 " , （204号 3 / 4 " NPT connections.
2.The arrow direction in the cover must beas same as the flow direction in the pipe.
3.Theflowswihsgstedtostalotalipesifietoerticalpesttetioiteieutad
flow. It is not allowed to be installed on the vertical lineswith downward flow.
4.To avoid the paddle damage,flow reversal is not allwed when the flow switch is working.
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The paddle trimming figure
Attention
the paddles with "\*"symbol are installed in factory the paddle with“& " symbol is the additional paddle.(not installed) the balance paddles are for trimming
FS200Series
Liquid Flow Switch
OrderRefNo
Principle and Structure
Online installation,mechanical flowswitch,Be used in liquid or gasmedia.Solid plastic,aluminum or stainless steel housing are optional.
Main Feature
Very few pressure loss,satisfactory repeatability and anti-pollution,mechanical and electronic partsare isolatedcompletely.More accurate setting accuracy, with setting dial gauge,easy setting,user no need to setonsite,switch status displaysin LED.
Application
Can be used in both gas and liquid,industrial automation,mechanical equipment,air compressor industrial, HAC.
| codePipeDiameter | Connection | DistributingDetail | Materials | Alarmsetting range | ElectricalConnection |
| 1 Thread connection G1/4 | BFemale thread | C 24vitribting | POMrenforced | F M12 plug | |
| 2AThread connection G1/2 | / | ASCdistrbgting | Axid MAluminum | 1…15L/Min | Hirschmann plug |
| 3Thread connection G3/8 | / | / | D 304 stainless steel | 228L/Min | / |
| 4Thread connection G3/4 | / | / | / | 27.…70L/Min | / |
| 5 Thread connection G1 | / | / | / | 1 | / |
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