Wrapped head repairing tools

PE and PVC pipe repair coupling

Considerations for use and operation of repairing tool series products:

1.Operationmethod

2.Storage,maintenance,installation anduse

The installation of repairing toolis very simple.Dismantle the plugfirst. Put the sealing ring into thevalve body withthe sealingring aligning withthesealgrooveof thevalve body.Then install the valvebodyat theplace of breakage and leakage. Screwin the bolts and usea spanner to tightenthebolt until only water flows out from the plug.Theninstall the plugwrapped withsealing tape on the plug opening.There is no need tostopwaterduring thewholeprocess

1.Store in dry and ventilated room;two ends of the valvepassage should be blocked.
2.Therepairing toolforlong-termstorage shouldbeinspectedregularlytoremovethe dirt.Payattention tocleanlinessanddamageof thesealingsurface.
3.Checkthevalvemarkcarefullybeforeinstallation andsee whetherit complieswiththeuserequirements.
4.Checkthesealing surface and sealing groove of the valvebodybeforeinstallation.lf thereissome dirt, usecleanclothtoclean.
5.Checkwhetherthe sealingring isintact without damage.Checkwhetherthe sealing ringisadheredwith foreignbodies.Otherwise,itssealingpropertywillbeaffected.Therefore,theforeignbodiesmustbe cleaned.Check whetherthe plug and plug thread iscomplete.Ifthere isany damage,pleaserepairor replace.
6.Takeoffthe plug at thetimeof installation.Then installthe plug afterthe valvebody is installed properly. Thereisnoneedtostopwater during theinstallationprocess.
7.Afteruseofsteelpipestraight siderepairingtoolshould bechecked afteruseforanydamageof the sealing surface andsealingring.lfitisdamaged andfailed,repairorreplacementshouldbemadeintime

Overview of check valves series:

The checkvalve series productsmainlyincluderubberplatecheckvalve,flange checkvalve,flange silencing checkvalve,etcproductsof many specification.They are mainly used atthe outlet of pipe pumps of water supply and drainage system,chemicalengineering departments to prevent reverse flow of medium.The products are simple in structure.The maintenance,repair and transportation are very convenient.

The internal structure of check valve

Valve clack (globular graphite lined with nitrile rubber)

Rubber plate check valves

Flange check valves

Flange silencing check valves

Considerations for use and operation of check valveseriesproducts

Workprinciple and characteristics

Storage,maintenance,nstallationanduse

1.The check valve opens and closes valve clack automatically depending on theself flowing of themediumto preventreverse flow of themediumwhen stopping thepump.
2.The valve clacks adopt inclined design.Short closing time can reducewaterhammer pressure.
3.The valve clacks are made of oil resistant nitrile rubber and steelplatethroughhightemperaturepressing andfeatures washing-outresistance,good sealing performance and
reliablesealing. 1.Store in dryand ventilated room;two ends of the valve passage should be blocked.
2.Thevalvesfor long-term storage should be inspected regularly to removethe dirt.
Payattentionto cleanliness of the sealing surfacetoprevent the damageof sealing ring.
3.Checkthe valvemarkcarefullybeforeinstallation andseewhetheritcomplieswiththe userequirements.

4.Checkthaassageadseinaceorestltinfthersdrt cleaningclothtowipeclean.

5.Payattention that theflowdirectionmarkonthe valveshould be consistentwiththe mediumflowdirectionbeforeinstallation.

6.The check valve should not bearweight in the pipeline.The largecheck valve should be supported separatelyso that it is free frominfluenceof pipe system. 7.During theuseprocess,pay attentionwhetherthevalvehas abnormal sound and vibration.In orderto prevent generationof water hammereffect inpipes,payattention tothepressurefluctuation of medium pressure inthepipes.

1.Considerationfor operation

2.Storage,maintenance,installationanduse

Install theflange flterat the pipeline connection directly. During theinstalltionprocess, specialattentionshouldbepaid to the direction.The direction indicated bythearrowon the valve bodyis theflowdirection of the medium.

1.The fiters should bestored in dry and ventilated room; two ends of the fliterpassage should beblocked.
2.Thefiterforlong-termstorageshouldbeinspectedregularlytoremove thedirt.
3.Checkthefitermarkcarefullybeforeinstalltionandseewhetherit com -plies with the use requirements.
4.Checktheinercavityof thefiterbeforeinstalltion,thefiterelemen i particularandsee whetherit sintact.f thereissome damage,it should be repaired orreplaced.If there is some dirt,use clean clothtowipe clean.
5.Checkwhethertheboltsonthevalvecoveristightenedbefreinstallaion to ensure the sealing performance of the sealing ring.
6.Duringthenstaltionprocessensurethat thedirectionndicatedbthearrow is consistent withflow directionof themedium.
7.Regularinspection should bemade during theuseprocessandcheckwhether thefiterelement isadhered withimpurities.Remove thedirtandimpuritiesto prevent that flowing of themediumisaffectedbymoreimpuritiesordamageto the fiterelement.lfitisdamagedorfailedmakerepairrreplacement intime. The flow in the pipe should be intercepted at the time of inspection.
8.Regular inspectionshouldbe alsomadeafteruse.Check thedamagecondition of thesealingring and fiterelementlf itisdamagedorfailedmakerepairnd replacementintime.

Flange filters

Y pull rod telescopic filters

1.Considerationforoperation

InstalltheYpull rod telescopicfilteron the pipeline directly.Special attention should be paid to the installation direction during the installation process. The direction indicated by the arrow on the valve body is flow direction of the medium.The installation length of the product does not exceed the maximum value.

2.Storage,maintenance,installationand use

1.The fiters should be stored in dry and ventilted room; two ends of thefiterpassage shouldbe blocked.
2.The fiterforlong-term storage should be inspected regulaly toremove the dit.
3.Checkwhetherthemarkonpullrod telescopicfitercomplieswiththeuserequirementscarefullybeforeinstallation.
4.Checkthenecavityf thefiteforestalltion,thefiteelementinpaticularandeehetheriintactf thereisomedamag it should be repaired or replaced. If there is some dirt, use clean cloth to wipe clean.
5.Check whether the bolts on the valve cover is tightened before installtion to ensure the sealing performance of the sealing ring. 6.During the installtion process, ensure that the direction indicated by the arrow isconsistent with flow direction of themedium.
7.During theinstalltion process,ensure that the installation length ofYfiter does not exceed themaximum value.
8.Regularinspectionshould bemadeduring theuse process and check whetherthefilterelement isadhered withimpurities.Remove the dirt andmpuritiestoprevent that flowing of themediumisaffectedbymorempuriiesramageto thefilterelementfitis damaged orfaied make repair or replacement in time. The flow in the pipe should be intercepted at the time of inspection.
Regularinspectionshouldbe alsomade afteuse.Check thedamageconditionof the sealingring andflterlementf it isdamagedorfaild makerepair and replacement in time.

Flange rubber connectors

Materials of main parts and components

Internal structure of the connector

External dimension drawing

Sectional structural drawing

1. Connector flange 2. Valve body

The adopted standards:

Design and manufacturing standard:HT/T391
FlangesizestandardGB/T17241.6

Technical parameter:

Anti-vacuum degree

For the rubber connector with nominal inside diameter below 300mm and work pressure above1.6MPa, the anti-vacuum degreeis notless than1ooKPa.The vacuum degree of rubber connector ofother specification is specifiedbythesupplierthroughagreement.

Structural characteristics

The rubber connector is usually made up of inner rubber layer, fabric reinforcement layer, and intermediate rubber layer, external rubber layer, end reinforcing metal ring or steel wire ring and metal flange.

Storage, maintenance, installation and use

1.During transportation or storage process of the product, the product should be free of direct sunlight, invasion of snow and rain, scratching of sharp devices and avoid contact with all types of acid, alkali and oil as well as all types of organic solvents. During the use process, if corrosion occurs at the rubber connector, ensure to replace intimetoavoidunnecessarytrouble.

2.Thecommonwaterwithtemperatureof 0{-}80°C is the normal applicable medium that can flow through the rubber connector.Other special medium includes:oil, acid, alkali and other corrosive mediums and at high temperature condition, the rubber connector made of corresponding special material should be selected. 3.When the displacement amount is larger than or equals to the maximum compensation of the connector, the connector quantity should be increased tobalance the displacement.The connector is forbidden at the limit deflection displacement and deviation state in order to adjust the over error of pipes . The connector cannot beusedexceedingthelimit.

4.The pipes should be fixed on the suspended frame (hanger), supporting frame or anchored frame for water
supply of high-rise building or overhead water supply. The pipes should not bear its dead weight and axial force.
5.The valves should be stored in dry and ventilated room; two ends of the valve passage should be blocked.
6.The valves for long-term storage should be inspected regularly to remove the dirt.
7.Check the valve mark carefully before installation and see whether it complies with the use requirements.

Overview of control valve series products:

The control valve series productsmainly include differential pressure bypass balance valve,pressure reducing valve,flange single opening exhaust valve and products of many specifications and are mainly used in the water supply system with parallel connection of firewater and domesticwater.It is thevalvetoadjust thewater supply direction.

nternal structure of the control valve

See the following table for materials of mainpartsofthe control valveseries products:

Remote control floating ball valves

Pressure reducing valves

Considerations for use and operation of pressure reducing valve products:

1.lnstallationrequirements

5.1.There isnoorientationrequirement forinstallation of thevalve.Buttheoptimal methodishorizontal installation.The sundriesinside thepipes shouldbe cleaned completely.Note that the arrowhead onthe valvebodyshouldbeconsistentwithwaterflow direction.Afterinstallation,nopipelinepressure acts on valvebody andcomponents inside thevalve.

5.2.Onegatevalve andfilterare installedbefore the mainvalve.One gate valve is installed behind the main valveforthepurposeof convenientrepair.

5.3.The guide valve and guide pipe control system are assembled and debugged before delivery.lf the delivery setting requirement of themain valvedoesnot comply withonsiterequirements,itcanbeadjustedbytightening orloosening the screwontheguide valve.Tighteningin clockwise direction is to increase the pressure.Loosening in anti-clockwise direction is to reduce the pressure. Tightenthelocking nut afteradjustment iscompleted.

2.Maintenance and troubleshooting

Thisvalveistheself-lubricatingvalve with useof water.Thereisno need to add machineoil forlubrication.In case that the component inside the main valveis damaged,please dismantle,maintain andreplace thepartsaccording to the followingorder.

6.1. Close the gate valve before and behind the main valve first.
6.2.Loosenthe joint screwof thepipe onthemain valvecoverto discharge the pressureinsidethevalve.
6.3.Take down all screws including thenecessary copperpipe and nut caps in thecontrolpipeline.
6.4.Take down the valve cover and spring.
6.5.Take down the central spindle and ensure not to damage themembrane. Checkwhetherthemembraneand O-shapedringaredamaged.Ifthereis damage,there is noneed to dismantle theinnerparts.If themembrane is found damaged,continuetodismantle themembraneand O-ring.Take them out andreplace withnewmembrane and O-ring.
6.6.Check whether valveseat and central shaftinside themain valve is damaged. If there areimpuritiesinsidethemainvalve,removethem.
6.7.Install thereplacedpartstoassemble themainvalveaccordingto thereverse order.After assembly,thevalve should not bejammed.

Slowly closing silencing check valves

Pressure release/ holding valves

SJ500X-16Q (Product Code:8071)|main external size and connection size

Hydraulic power electric control valves

SJ600X-16Q (Product Code:8081)|main external size and connection size

Differential pressure bypass balance valves

1.lnstallationrequirements

1.Thereinoorientationrequirementforinstalltionof thevalveButtheoptimalmthodishorizontalinstallation ThesundriesinsidethepipesshouldbecleanedcompletelybeforeinstalltionNotethatthearrowheadonthe valve body should be consistent with water flowdirection.

2.Onegatevalveisinstalled beforeandafterthemainvalveforthepurposeofconvenientrepair.
3.Checkwhetherallgatevalvesall valvesandneedlevalvesareat thefull-passstatebeforese

4.Observe pressurebetween thesupplied waterand returnwater.Adjust the differential pressureguide valve according to the differential pressure valve.Open the driftcap ontheguidevalve andusea spanner torotate the screwrod on the top. Seeing from top to bottom, the differential pressure increases with clockwise rotation and decreases with anti-clockwise rotation.Make rotation according to the required left value.When the differential pressurereaches the targetvalve,screw in the driftcap.At the condition,the differential pressure is ensuredat the set differential pressure value no matter howthe pipe pressure changes.

2.Maintenance andtroubleshooting

1.Check whetherthe differential pressure between the supplied water/return wateris between the required scope regularly.

2. Possible conditions: The differential pressure between the supplied water/return water is less than the set valve; check whether the main valve is blocked by foreign matters, which cause it failed to close. Check whether the needle valve is closed completely or almost closed. The differential pressure between the supplied water/return water is larger than the set valve. Check whether the ball valve is closed and the guide valve is blocked by foreignmatters.

Emergency shut-off valves

SJ900X-16Q (Product Code:8110)|main external size and connection size

Flange single opening exhaust air valves

Installation requirements:The flange single opening exhaust valve is applicable to water with temperature lower than 80°C and hot water pipe to discharge the air in the pipe completely.

QB1-16Q(Product Code:8011)|main external size andconnection size

LESSO Cast SteelValve Success in Quality

GATEVALVESERIES

Steel casting flange gate valves

Butterfly Valves Series

Flange worm gear transmission butterfly valves

Flange swing type check valves

Flange Lifting type check valves

H41H-1C (Product cde:31| manexterna sie and conectionsie

Considerations for use and operation of check valve series products:

.Workprinciple andcharacteristics

.Storage,maintenance,installationanduse

1.The check valve opens and closes valve clack automatically depending on the self flowing of themedium to prevent reverseflowof themedium when stopping the pump. 2.The valve clacks adopt inclined design.Short closing time can reducewaterhammer pressure. 3. The valve clacks are made of oil resistant nitrile rubber and steel plate throughhigh temperature pressing and features washing-outresistance,good sealing performance and reliablesealing.

1.The valve should be store indry andventilated room;two ends of the valvepassageshould beblocked.
2. The valves for long-term storage should be inspected regularly to remove the dirt.Pay attention to cleanliness of the sealing surface to prevent the damage of sealing ring..
3.Checkthe valve markcarefullybeforeinstallation andsee whetherit complies with theuserequirements
4.Checkthevalvepassageandsealing surfacebeforeinstallation.If thereisdirt,usethecleaning clothto wipeclean.
5.Pay attentionthat the flowdirectionmarkonthevalve should beconsistent with themediumflow directionbeforeinstallation.
6.Thecheck valve should not bearweight inthe pipeline.Thelarge checkvalve should be supported separately so that it isfreefrom influence of pipe system.
7.During theuseprocesspayattentionwhetherthevalvehasabnormal soundandvibration.Inordr topreventgenerationof waterhammereffect inpipes,payattentiontothepressurefluctuationof medium inthepipes.

CUT OFF VALVE SERIES

Flange check valves

BALLVALVESERIES

Flange ball valves

COMPENSATORSERIES