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BSG SERIESOIL-FREE SCREW BLOWER
BSGseries Oil-Free Screw Blowers
15\~450 Power kW
1.1\~2.0 Pressure bar
4.1\~190.9 Flow m³/min
PRODUCT FEATURES
Lower Energy Consumption
Highly efficient and energy-saving, with an average energy savings of 20-35% compared to Roots blowers.
Eco-Friendlyand Oil-Free
The screw rotorsare coated with an ultra-corrosion-resistant layer and do not come into contact witheach other.The rotor chamberinside the airend isoil-free,ensuring cleaner compressed air and preventingproductcontamination.
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LowerNoise Levels
An enclosed soundproof casing, combined with custom-designed intake and exhaust silencers, ensures minimal noise. Additionally,the intake air passes through a specially designed noise reductionchannelbefore entering the airend,maintaininga low overallnoise level.
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Highly Integrated Design
Compact structure with no foundation required, making installation easy and convenient.
Advanced Automation
Fully automated control for simple operation, eliminating the need for dedicated supervision and reducing labor costs.
Superior Stability
Compared to Roots blowers, the system has lower leakage,reduced temperature rise,and stronger pressure buildup,withamaximum pressure increase ofup to 0.2 MPa.
BSG SERIES 01/02OIL-FREESCREWBLOWER
COMPONENT INTRODUCTION
1 ScrewAirend
Bearingsadapt to changing loads,providing high flexibility and efficiency for smooth operation.
O 0
2
Microcomputer Controller
Integrated blowercontrol system.Displays overall system performance，maintenance alerts,faultwarnings,and safetyshutdowns.
3 Oil Circuit System
IntegratedVariableSpeedDrive
Advanced design integrates oil pump,oil cooler, and filter. Lower oil temperature, extending bearing and gear lifespan.
Fullyintegrated drive system eliminates the need for additional installation.Optimized drive components ensure precise parameter settings for higher efficiency. Optimize the componentselection.Lower installation costs.
1
AirFilter
High-quality intake filterensures high filtration efficiency，reliability，and energyefficiency. Extended lifespan with longer maintenance intervals.
6
PermanentMagnetMotor
Low-speed，high-torque performance.Exceeds IE3 efficiency standards.Independent fan cooling ensures stablemotoroperation.
IntakeandExhaustSilencers
Soundproof Enclosure
Fixed intake and exhaust ports for easy pipeline connection.Lined grilles to further reduce noise. Independent coolingairflowprevents recirculation.
Noisereductionvia acoustic foam and metal panel reflections.Lower blower room soundproofing costs. Easy inspectionaccessvia removable panels.
PRODUCT ADVANTAGES
Energy Efficiency Comparison MoreIntuitiveEconomicBenefits
WorkingPrincipleof RootsBlower
① Air intake begins.
② Air intake ends,volume remains constant.
③ Gas compression due to back pressure.
④ Exhaust.
WorkingPrincipleofScrewBlower
① Air intake begins.
② Air intake ends, compression begins.
③ Compression process.
④ Compression ends,exhaust begins.
Low Energy Consumption
Based on thermodynamic compression principles， the total efficiency exceeds 7 5 % saving 2 0 - 3 5 % more energy than Roots blowers. Higher exhaust pressure with lower pressure pulsation.
Low Noise
The screw rotor generates minimal aerodynamic noise.Smooth airflow output eliminates sudden internal air release.Wave-shaped inlet and exhaust ports further reduce airflow fluctuations, making it quieter than traditional blowers.
Energy Efficiency Comparison Between Traditional RootsBlowersand Oil-FreeScrewBlowers
Pressure/Volume Diagram of Roots Blowe
Pressure/VolumeDiagram ofScrew Blower
4 { } 1 Air intake.
4 { } 1 Air intake.
1 2 External compression.
The air volume remains constant, and compression occurs externally due to pipeline back pressure.
The compressed gas is discharged into the pipeline.
2 3 Exhaust.
1 2 Internal compression. Themale and femalerotors intermesh,reducing volume and increasing pressure.
2 3 Exhaust.
The compressed gas is discharged into the pipeline.
Intelligent Operation
Smart PLC control with remote monitoring capability. Multiple communication options for convenientoperationandmanagement.
Low Operating Cost
Optimized structural design ensures durability with minimal material consumption.Smooth operation with low mechanical load, eliminating the need for specialized infrastructure. Maximizedcustomerbenefits.
Total Energy Loss Analysis
TraditionalRootsBlowers'highinternal airflow resistance,leading to higher pressure drop and increased energy consumption.
EnergyLoss Factors
① External compression ③ Silencerresistance ② Belt slippage ④ Intake filter resistance
At0.8bar pressure,delivering 1 , 6 0 0 ~ \mathsf { m } ^ { 3 } / \mathsf { h } ,aRoots blower consumes an average of 61 kW.
Energy Savings Through Integrated Design
BSG Series Oil-Free Screw Blower'optimized internal airflow paths reduce pressure drop andairturbulence.
Energy-Saving Factors
① Internal compression ③ Optimized silencer design ② Integrated gearbox ④ Efficient intake filter
At 0.8 bar pressure,delivering 1 , 6 0 0 { m } ^ { 3 } / { h } , ascrew blower consumes only 42 kW on average.
Continuous Operation
Reliable compressed air supplyis criticalfor uninterrupted production in dusty and harsh conditions.BSG Series Oil-Free Screw Blowers meet GB/T15487 standards and feature fully enclosed IP54 motors,ensuring continuous and reliable operation even in dusty and humid environments.
Protecting Your Reputation and Production
Oil contamination in compressed air can cause serious production issues and increased Costs.BSG Series Oil-Free Screw Blowers set new standards for air purity， providing superior protection for critical applications and meeting increasingly stringent air quality requirements.
Easy Installation
BSG Series Oil-Free Screw Blowers are ready to use upon delivery. Comprehensive supply package eliminates the need for additional purchases.Simplified installation process,saving both time and cost. Can be directly integrated into existing compressed air pipelines for immediate operation.
PERFORMANCE SPECIFICATION
115RA
| MotorSpeed | 5000 | 5000 | 5000 | 5000 | |||||||
| FlowCapacity | 5.2 | 5.1 | 5.0 | 5.0 | 5.0 | 4.5 | 4.4 | 4.3 | 4.2 | 4.1 | |
| MotorSpeed | 5250 | 5250 | 5250 | 5250 | |||||||
| FlowCapacity | 5.6 | 5.5 | 5.4 | 5.7 | 5.3 | 4.8 | 4.7 | 4.6 | 4.5 | 4.3 | |
| MotorSpeed | 5500 | 5500 | 5500 | 5500 | |||||||
| FlowCapacity | 5.9 | 5.9 | 5.8 | 5.7 | 5.6 | 5.1 | 5.0 | 4.9 | 4.8 | 4.6 | |
| MotorSpeed | 5750 | 5750 | 5750 | 5750 | |||||||
| FlowCapacity | 6.3 | 6.2 | 6.1 | 6.0 | 6.0 | 5.5 | 5.3 | 5.2 | 5.0 | 4.9 | |
| MotorSpeed | 6000 | 6000 | 6000 | 6000 | |||||||
| FlowCapiacity | 6.7 | 6.6 | 6.5 | 6.4 | 6.3 | 5.8 | 5.6 | 5.5 | 5.3 | 5.2 | |
| PackageModel MotorPower | BSG15-1.2 115RA 15kW | BSG19-1.5115RA 18.5kW | BSG22-1.5115RA 22kW | BSG19-1.7115RA 18.5kW | BSG22-1.9 115RA 22kW | BSG30-2.0 115RA 30kW |
115RB
Startup Method OutletDiameter Dimension (L\*w\*H)mm Weightkg PM&VFD DN150 1945\*1100\*1495 1000
| Pressure bar MotorSpeed | 5000 | 5000 | 5000 | 1.9 5000 | |||||||
| FlowCapacity | 7.1 | 7.0 | 6.8 | 6.7 | 6.6 | 6.1 | 6.0 | 5.9 | 5.8 | 5.7 | |
| MotorSpeed | 5250 | 5250 | 5250 | 5250 | |||||||
| FlowCapacity | 7.6 | 7.5 | 7.3 | 7.2 | 7.1 | 6.6 | 6.4 | 6.3 | 6.3 | 6.1 | |
| MotorSpeed | 5500 | 5500 | 5500 | 5500 | |||||||
| FlowCapacity | 8.1 8.0 | 7.7 7.5 | 7.0 6.9 | ||||||||
| MotorSpeed | 5750 | 7.8 5750 | 5750 | 6.7 | 5750 | ||||||
| FlowCapacity | 8.6 | 8.5 | 8.3 | 8.2 | 8.0 | 7.5 | 7.3 | 7.2 | 7.1 | 6.9 | |
| MotorSpeed | 6000 | 6000 | 6000 | ||||||||
| FlowCapacity | 9.2 | 9.0 | 8.9 | 8.7 | 8.6 | 7.9 | 7.8 | 7.7 | 7.5 | 7.4 | |
| PackageModel | BSG19-1.2115RB | 18.5kW | BSG22-1.5115RB 22kW | BSG30-1.5115RB 30kW | BSG22-1.8115RB | BSG30-2.0115RB | |||||
170RA
| MotorSpeed | 3000 | 3000 | ||||||||
| FlowCapacity | 11.6 | 3000 11.5 | 11.5 | 11.4 11.4 | 11.3 | 11.0 | 10.8 | 10.5 | ||
| MotorSpeed | 3200 | 3200 | 11.2 3200 | |||||||
| FlowCapiacity | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 12.0 | 11.8 | 11.6 | 11.3 | |
| MotorSpeed | 3400 | 3400 | ||||||||
| FlowCapacity | 13.4 | 13.3 13.2 | 13.2 | 13.1 | 12.9 | 3400 12.7 | 12.4 | 12.1 | ||
| MotorSpeed | 3600 | 3600 | 3600 | |||||||
| FlowCapacity | 14.3 | 14.2 | 14.2 | 14.1 | 14.0 | 14.0 | 3600 13.8 | 13.6 | 13.3 | 13.0 |
| MotorSpeed | 3800 | 3800 | 3800 | |||||||
| FlowCapacity | 15.3 | 15.2 | 15.1 | 15.1 | 15.0 | 15.0 | 14.7 | 14.5 | 14.2 | 13.9 |
| MotorSpeed | 4000 | 4000 | 4000 | 4000 | ||||||
| FlowCapacity | 16.2 | 16.2 | 16.1 | 16.0 | 16.0 | 15.9 | 15.7 | 15.5 | 15.1 | 14.8 |
| MotorSpeed | 4200 | 4200 | ||||||||
| FlowCapacity | 17.2 | 17.2 | 17.1 | 4200 17.0 | 16.9 | 16.9 | 16.7 | 16.4 | 16.0 | 15.7 |
| PackageModel Motor Power | BSG30-13 30kW | B51G37-1.5 37kW | B51737-1.2 37kW | BSG45-1.5 45kW | B51G5-1.5 55kW | BSG45-2.0 45kW | B5175-2.0 55kW |
| 170RB | Startup Method | OutletDiameter | Dimension (L*w*H)mm | Weightkg |
| PM&VFD | DN150 | 2200*1250*1650 2200*1250*1800★ | 1500 1600★ |
| MotorSpeed | 1.1 1.2 3600 | 1.4 1.5 3600 | 1.6 1.7 1.8 3600 | 1.9 | 2.0 3600 | |||||
| FlowCapacity | 20.2 | 20.1 | 20.1 | 20.0 | 19.9 | 19.1 | 18.9 | 18.7 | 18.5 | 18.2 |
| MotorSpeed | 3800 | 3800 | 3800 | 3800 | ||||||
| FlowCapacity | 21.5 21.4 | 21.3 21.3 | 20.3 20.1 | 19.9 19.6 | ||||||
| Motorspeed | 4000 | 4000 22.8 | 4000 | 4000 | ||||||
| FlowCapacity | 22.9 22.8 | 22.7 22.6 | 21.6 21.4 21.2 | 20.6 | ||||||
| Motorspeed | 4200 | 4200 | 4200 | 20.9 | ||||||
| FlowCapacity | 24.4 | 24.3 | 24.2 | 24.1 | 24.0 | 23.0 | 22.8 | 22.5 | 22.3 | 21.9 |
| PackageModel Motor Power | BSG45-1.2 170RB 45kW | BSG55-1.4170RB 55kW | BSG75-1.5170RB 75kW★ | BSG55-1.9 170RB 55kW | BSG75-2.0170RB 75kW★ |
210RA
| Pressure bar | 1.1 1.2 3200 | 1.4 1.5 3200 | 1.7 | ||||||
| MotorSpeed | 28.3 | 28.2 | 3200 26.7 | 26.4 | 3200 | ||||
| FlowCapacity | 3400 | 28.2 | 28.1 | 28.0 | 27.1 3400 | 26.8 | 26.2 | ||
| MotorSpeed FlowCapacity | 3400 30.0 | 28.9 | 3400 | ||||||
| MotorSpeed | 30.2 3600 | 30.2 | 30.1 3600 | 30.0 | 28.7 | 28.5 3600 | 28.2 | 28.0 | |
| FlowCapacity | 32.1 | 30.8 30.6 | |||||||
| 32.2 | 32.1 | 32.0 | 31.9 | 30.4 | 30.1 | 29.8 | |||
| MotorSpeed FlowCapacity | 34.1 | 3800 | 32.7 | 3800 32.4 | 31.9 | 3800 31.6 | |||
| MotorSpeed | 34.2 | 4000 | 34.1 | 34.0 | 33.9 4000 | 32.2 | 4000 | ||
| FlowCamiacity | 4000 34.4 | ||||||||
| MotorSpeed | 36.2 | 36.1 4200 | 36.1 | 36.0 4200 | 35.9 | 34.7 | 34.1 | 33.8 | 33.5 |
| FlowCapacity | 38.3 | 38.2 | 38.1 | 38.0 | 37.9 | 4200 36.6 36.3 | 36.1 | 4200 35.7 | 35.4 |
| PackageModel MotorPower | BSG55-1.2 210RA 55kW | BSG75-1.5 210RA 75kW | BSG75-1.4 210RA 75kW | BSG90-1.5 210RA 90kW | BSG75-1.9 210RA 75kW | BSG90-2.0 210RA 90kW | BSG90-1.8 210RA 90kW | BSG110-2.0 210RA 110kW |
280RB
Startup Method OutletDiameter Dimension ( L ^ { \star } W ^ { \star } H ) \mathsf {mm } （2 Weight kg PM&VFD DN250 3000\*1390\*2070 3350
| Pressurebar MotorSpeed | 1.1 2800 | 1.2 1.3 2800 | 1.4 1.5 2800 | 1.6 1.7 1.8 2800 | 1.9 2.0 2800 | |||||
| FlowCapacity | 53.9 | 53.7 | 53.3 | 52.9 | 52.6 | 53.5 52.3 | 51.2 | 50.1 48.9 | ||
| 2900 | 2900 | 2900 | 2900 | 2900 | ||||||
| MotorSpeed Flow Capacity | 56.0 | 55.5 | 54.7 | 54.5 | 53.3 52.1 | 50.9 | ||||
| MotorSpeed | 3000 | 55.9 3000 | 55.1 | 3000 | 55.7 3000 | 3000 | ||||
| FlowCapacity | 58.3 | 58.1 | 57.3 56.9 | 56.6 | ||||||
| MotorSpeed | 3100 | 57.7 | 3100 | 57.9 | 55.4 3100 | 54.2 | 53.0 | |||
| FlowCapacity | 60.5 60.3 | 59.5 59.1 | 60.1 58.8 | 55.0 | ||||||
| MotorSmed | 3200 | 59.9 | 3200 | 57.6 3200 | 56.3 | 3200 | ||||
| FlowCapacity | 62.8 | 62.6 | 62.1 | 61.7 | 61.3 | 62.4 | 61.0 59.7 | 58.4 | 57.1 | |
| MotorSpeed | 3300 | 3300 | 3300 | 3300 | ||||||
| 64.4 | 64.0 | 63.5 | 64.6 | 61.9 | ||||||
| FlowCapacity | 65.1 | 64.8 | 63.3 | 60.5 | 59.1 | |||||
| Package Model Motor Power | BSG90-1.1 280RB 90kW | BSG110-1.3280RB 110kW | BSG132-1.5280RB 132kW | BSG132-1.8 280RB 132kW | BSG160-2.0280RB 160kW | BSG185-2.0280RB 185kW |
210RB
| Pressurebar MotorSspeed | 1.1 1.2 3600 | 1.3 1.5 3600 | 1 | 1.8 | 1.9 | 2.0 | ||||
| Flow Capacity m³/min | 41.5 | 41.3 | 41.1 | 40.9 | 40.7 | 1 | 1 | |||
| MotorSspeed | 3800 | 3800 | 3800 | 3800 | 3800 | |||||
| FlowCapiacity | 43.9 | 43.7 | 43.5 | 43.3 | 43.1 | 40.3 | 39.9 | 39.5 | 39.2 | 38.9 |
| MotorSpeed | 4000 | 4000 | 4000 | 4000 | 4000 | |||||
| FlowCapacity | 46.4 | 46.2 | 46.0 | 45.8 | 45.5 | 42.6 | 42.2 41.7 | 41.4 41.1 | ||
| MotorSpeed | 4200 | 4200 | 4200 | 4200 | ||||||
| FlowCapacity | 48.9 | 48.6 | 48.4 | 48.2 | 48.0 | 44.9 | 44.4 | 44.0 | 43.6 | 43.3 |
| PackageModel Motor Power | BSG75-1.2210RB 75kW | BSG90-1.4210RB 90kW | BSG110-1.5210RB 110kW | BSG110-1.8210RB 110kW | BSG132-2.0210RB 132kW | |||||
300RB
Startup Method Outlet Diameter Dimension (L\*W\*H)mm Weightkg PM&VFD DN300 3300\*1700\*2250 4000
| Pressurebar MotorSpeed | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 2600 | 1.6 | 1.7 2600 | 1.8 | 1.9 2.0 2600 | |
| FlowCapacity | 76.2 | 2600 | 75.2 | 74.8 | 73.3 | 73.0 | 72.7 | 72.3 72.0 | ||
| 75.8 2700 | 75.5 | 2700 | 2700 | 2700 | ||||||
| MotorSpeed FlowCapacity | 77.9 | 2700 | 75.0 | |||||||
| 79.3 | 79.0 2800 | 78.6 | 78.3 | 76.4 2800 | 76.0 2800 | 75.7 | 75.3 | |||
| MotorSpeed FlowCapacity | 81.8 | 2800 | 81.1 | 79.4 | 2800 | |||||
| MotorSpeed | 82.5 2900 | 82.2 | 81.4 2900 | 2900 | 79.1 | 78.7 2900 | 78.4 | 78.0 2900 | ||
| FlowCapacity | 85.7 85.3 | 84.2 | 82.5 82.2 | 81.8 | 81.4 81.0 | |||||
| MotorSpeed | 3000 | 85.0 3000 | 84.6 | 3000 | 3000 | 3000 | 3000 | |||
| FlowCapacity | 88.9 | 88.6 | 88.2 | 87.8 | 87.4 | 85.6 | 85.2 | 84.9 | 84.5 | 84.1 |
| MotorSpeed | 3100 | 3100 | 3100 | 3100 | ||||||
| FlowCapacity | 92.2 | 91.8 | 91.4 | 91.0 | 90.6 | 88.8 | 88.4 | 87.9 | 87.5 | 87.1 |
| Motorspeed | 3200 | 3200 | 3200 | 3200 | 3200 | |||||
| FlowCapacity | 95.4 | 95 | 94.6 | 94.2 | 93.8 | 91.9 | 91.5 | 91.1 | 90.6 | 90.2 |
| MotorSpeed | 3300 | 3300 | 3300 | 3300 | 3300 | 3300 | ||||
| FlowCapacity | 98.7 | 98.3 | 97.9 | 97.4 | 97 | 95 | 94.6 | 94.2 | 93.8 | 93.3 |
| PackageModel MotorPower | BSG160-1.3BSG185-1.5BSG185-1 300RB 160kW | 300RB 185kW | 300RB 185kW | BSG200-1.5 300RB 200kW | BSG220-1.5 300RB 220kW | BSG185-1.8 300RB 185kW | BSG200-1.8 300RB 200kW | BSG220-1.8 300RB 220kW | BSG250-1.9BSG280-2.0 300RB 250kW | 300RB 280kW |
PARAMETERS AND APPLICATION
360RB
| Pressurebar | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 |
| MotorSpeed | 2400 | 2400 | 2400 | ||
| FlowCapacity | 141.3 | 140.4 | 139.5 | 138.6 | 137.7 |
| MotorSpeed | 2500 | 2500 | 2500 | ||
| Flow Capacity | 148.7 | 147.7 | 146.8 | 145.8 | 144.9 |
| MotorSpeed | 2600 | 2600 | 2600 | ||
| FlowCapacity | 156.2 | 155.2 | 154.2 | 153.2 | 152.2 |
| MotorSpeed | 2700 | 2700 | 2700 | ||
| FlowCapacity | 163.0 | 161.9 | 160.9 | 159.9 | 158.8 |
| MotorSmeed | 2800 | 2800 | 2800 | ||
| FlowCapacity | 169.9 | 168.8 | 167.7 | 166.6 | 165.5 |
| Motor5peed | 2900 | 2900 | 2900 | ||
| FlowCapacity | 176.8 | 175.7 | 174.5 | 173.4 | 172.3 |
| MotorSpeed | 3000 | 3000 | 3000 | ||
| FlowCapacity | 183.8 | 182.6 | 181.5 | 180.3 | 179.1 |
| MotorSpeed | 3100 | 3100 | 3100 | ||
| FlowCapacity | 190.9 | 189.7 | 188.5 | 187.2 | 186.0 |
| PackageModel MotorPower | BSG280-1.2 360RB 280kW | BSG315-1.4 360RB 315kW | BSG315-1.2 360RB 315kW | BSG355-1.5 360RB 355kW | BSG355-1.4 360RB 355kW | BSG400-1.5 360RB 400kW | BSG450-1.5 360RB 450kW |
■The above models are only for indoor installation,with applicable power supply of 380V 5 0 H z
■Operating environmental conditions:ambient temperature 5 ^ { \circ } C ~ 4 5 ^ { \circ } C , relative humidity 0 % ~ 9 0 % ,airborne dust concentration 0 ~ 2 \mathsf { m g } / \mathsf { m } ^ { 3 } . installation altitude <= 1 0 0 0 meters.
Foroutdoorinstalationorapplicationunderotherspecialworkingconditions,pleasesubmitatechnicalconsultationandasesmet to our company.
NINGBOBAOSI ENERGYEQUIPMENTCO.,D.
+86-574-88607352
0 www.cnbaosi-compressor.com
tradingdept@cnbaosi.com
No.55JuchaoRoad,JiangkouStreet, Fenghuaistrict,ingboCityZhejiang Province,ina
1st Version,July2026 Ningbo Baosi Energy Equipment Co.,Ltd.reserves the right ofinalinterpretation of this brochure.
