- Gate valve
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- DN1000 Extension stem double flange soft seal gate valveDIN F4 resilient seated gate valveDN450-1200 Resilient Seated Gate ValveDIN F5 resilient seated gate valveSocket connection soft seal gate valveUnderground cap soft seal gate valveBS5163 rising stem soft seal gate valveHard seal gate valveAPI slab Gate ValveStainless steel flange gate valveWafer knife gate valvePneumatic gate valveSoft seal gate valveExtension stem gate valveUL/FM fire protection groove ends gate valveRising stem forged steel gate valvecarbon steel gate valveStainless steel threaded gate valveDIN soft seal gate valveANSI soft sealing gate valve 200PSICast iron gate valveBS resilient seated gate valve
- Butterfly valve
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- DN900 pneumatic triple eccentric hard seal butterfly valveD643H Triple Eccentric Butterfly ValveD343H Hard seal butterfly valveMulti standard EPDM seated butterfly valveSingle flange butterfly valveDN2000 Double eccentric butterfly valveFlange butterfly valveLug butterfly valveWafer butterfly valve with handleWorm gear operated butterfly valveWafer lined fluorine butterfly valveStainless steel wafer butterfly valveStainless steel flanged butterfly valveThree eccentric flange butterfly valvePneumatic flanged butterfly valvePneumatic wafer butterfly valveTriple eccentric butterfly valve wafer typeWafer butterfly valve ULC approvedInflatable seat butterfly valveHigh performance butterfly valveGrooved end butterfly valveElectric soft seal butterfly valveFlange fluorine lined butterfly valveHandle aluminum butterfly valveWorm Gear Aluminum Butterfly ValveFull PTFE lined butterfly valve wafer typeOne stem no-pin wafer butterfly valveMulti standard aluminum stem butterfly valveStainless Steel wafer Butterfly ValveAluminium handle operated lug butterfly valveLever Operated Flange Butterfly ValveButterfly valve stemButterfly valve discButterfly valve seat
- Ball valve
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- DN1400 top-mounted eccentric semi-ball valveFlanged three-way ball valveFully welded ball valveNatural gas ball valveHigh platform flange ball valve1 PC ball valveFixed ball valvePTFE seat flanged ball valveMetal seat ball valveAPI 6D ball valve3 Piece ball valveFull Bore 3 way ball valve L-Port3 Way T-Port ball valve2PC Ball valve female thread stainless steel
- Globe Valve
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- API Carbon Steel Globe ValveBellows Globe ValveStainless steel flange globe valveStainless steel thread S type globe valveStainless steel thread B type globe valveCast Steel Globe ValvePiston Globe ValveWCB Carbon Steel Globe Check Valveelectric motorized control stainless steel SS316 globe valveBrass Globe ValveCryogenic Globe valveHT200 Globe ValveThreaded Stainless Steel Globe ValveGG25 Globe ValveANSI API Cast Steel And Stainless Steel Globe valve
- Check valve
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- Rubber seal check valveDN800 Slow closing check valveDN800 Rubber Disc Check ValveButterfly Buffering Check Valvecheck valve with counter weightSilent Check ValveWCB Swing check valveSwing Check ValveSingle Chip Check Valve H74WStainless Steel Wafer Check ValveSwing Start Check ValveFoot check valveAPI Swing Check ValveDIN Flange check valveSingle plate check valveLifting Check ValveBottom ValveHammer Diminish Noises Check ValveWafer Check ValveWafer dual plate check valve
- Water Meter
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- Vertical Type Water MetersStainless steel threaded water meterPiston water meterPlastic water meterMore flow rotor dry water meterspiral vane flange water meterCI wotlman water meter with pulse outputLXCLG(R) Vertical removable element woltman cold (hot) water meterSingle flow rotor dry water meterPrepaid Token Water MeterElectromagnetic flowmeterRotary Piston Liquid Sealed Water MeterRotary Piston Liquid Sealed Water Meter
- Air valve
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- Double ball exhaust valveDoubleair Air Valve SaudiDoubleair Air Valve Southeast AsiaDoubleair Air Valve South AmericaDouble Air ValveThreaded Air ValveSingle Air ValveTriple Functions Air ValveAutomatic Air Release ValveAutomatic release valveAutomatic exhaust valveComposite Exhaust Air ValveBrass exhaust valveDouble Ball Air Valve
- Pipe Repair & Coupling
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- Flexible Multi-Function Pipe Coupling ZFJ-SSS Semi-Circle Pipe Repair Clamp SJW-HDuctile Iron Band Repair ClampStainless Steel Band Repair ClampDouble-Section Pipe Repair CouplingFolding Type Pipe RepairSingle-Section Multi-Function Pipe Coupling MF-SGear-Ring Type Multi-Function Pipe Coupling GR-SZBW Damping Corrugated Hose
- Dismantling Joint
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- VSSJAFC(CC2F) Detachable Flange Transmission JointVSSJA-2(B2F) Double Flange Limited Expansion JointVSSJA-1(BF) Single Flange Limited Expansion JointVSSJA(AF) Flange Loose Expansion JointJGD-B Threaded Rubber JointZBW Damping Corrugated HoseKXT-S Flexible Dual-Spherical Rubber JointKXT Rubber Soft JointFlange Adaptor
Safety Valve problem and solutions
Faults
Causes
Solutions
Leakage
1. Dirt Occurred on sealing surface
Use lift wrench or other method to make valve opened several times to wash away the dirt. If the dirt cannot be removed, take apart the valve to clean it away, and then have the valve reassembled for commissioning.
2. Sealing surface damaged
Take apart the valve and have the damage repaired by grinding or grinding after turning responding to the extent of damage. After repair, sealing face shall be assured of sound plainness With its roughness Ra value not lower than 0.1.
3. Improper installation or the additional load of pipeline
Re-install or remove the additional load of pipeline.
4. High temperature or corrosive media
Have spring or even valve replaced according to the actual working conditions. If it is merely for the reason of improper adjustment of spring, it can be regulated by fastening or loosening the adjusting bolt.
5. The opening pressure of safety valve is too close to the working pressure equipment
Reset the pressure with the permissible range of spring pressure. On the condition that strength can be met, the set pressure of safety valve shall be suitably enhanced.
Inflexible opening and closing
1. Improper position adjustment of adjusting ring
Improper position of adjusting ring has made the opening process of safety valve lengthened or re-seating slow. Re-adjust it to meet the requirements of production process
2. The moving parts inside jammed
It may be possibly for the reasons of improper assembly, insufficient machining precision, valve body invaded by impurities, or spare parts getting corroded. Take out solutions according to different occasions.
3. Excessive resistance of discharge pipe, high discharge back pressure, or insufficient lift of safety valve
Reduce the bending of discharge pipe and try to use straight pipe of diameter greater than outlet diameter.
Deviation of opening pressure value
1.Caused by working temperature
1.Pressure regulation under cold state for safety valves used under thermal state, loosen the nut of adjusting bolt and suitably fasten the adjusting bolt.
2.In case of improper model selection, such as safety valve for boilers in power station, the type carrying radiator may be used.
2. Caused by spring corrosion
Replace the spring. Under the conditions where media have the property of corrosion, spring used shall be wrapped by fluorine plastic on surface or safety valves with bellows isolation mechanism shall be used.
3. Caused by Variation of back pressure
In case that back pressure varies greatly, bellows safety valves with balanced back pressure shall be used.
4. Moving parts inside jammed
Check and remove
Chatter or flutter
1. Excessive discharge capacity of safety valve ( relative to the required discharge capacity)
Use safety valves of rated discharge as far as possible close to the required discharge of equipment
2. The diameter of inlet pipe being too small or having too much resistance
Make the inner diameter of inlet pipe not lower than the inlet diameter of safety valve or reduce the resistance of inlet pipe.
3. Excessive resistance of discharge pipe ( excessive discharge back pressure)
Lower the resistance of discharge pipe.
4. Improper adjustment of adjusting ring
Re-adjust the position of adjusting ring and reduce the excessive re-seating pressure
Excessive rigidity of spring
Use spring of lower rigidity.
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