- 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
How gate valves work when opened and closed?
2019-02-25
When the gate valve is closed: the sealing surface can only rely on the pressure of the medium to seal, that is to rely on the pressure of the medium to pressure the sealing surface of the valve plate to the other side of the valve seat to ensure the sealing surface, which is self-sealing. Most of the gate valve is the use of forced sealing, that is, when the valve is closed, to rely on external force to force the valve plate pressure to the seat, to ensure the sealing of the sealing surface.
Gate valve open: the flow path is completely clear when the lift height of the disc is equal to 1:1 of the valve size, but this position cannot be monitored during operation. In actual use, the valve stem is marked by the vertex, that is, the open position, as its full open position. In order to consider the temperature change lock phenomenon, usually in the open to the vertex position, then back to 1/2-1 turn, as the full open valve position. Therefore, the full open position of the valve is determined according to the position of the valve plate.
