- Gate valve
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- DIN f4 di flange resilient epdm gate valveDN450-1200 Resilient Seated Gate ValveDIN F5 Non-rising stem Resilient gate valveDIN F5 Socket connection soft seal gate valveUnderground cap soft seal gate valveBS5163 Rising stem Resilient soft seal gate valveBrass Threaded Gate ValveHard seal gate valveAPI Slab Gate ValveStainless Steel Gate ValveStainless Steel Knife Gate ValvePneumatic gate valve Control valveSoft Seal Gate ValveExtension stem gate valveNon rising stem Groove Soft Sealing Gate ValveRising stem Forged steel gate valveAPI carbon steel gate valveThreaded Gate ValveDin rising Stem And Non-Rising Stem Gate ValveUL-FM Rising stem flanged fire fighting system gate valveANSI Cast Iron Gate ValveBritish Standard Soft-Sealing Gate Valve
- Butterfly valve
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- DN2000 Double Eccentric Butterfly ValveFlange butterfly valveLug butterfly valveWafer Butterfly Valve With HandleWorm Gear Operated Wafer Butterfly ValveWafer lined fluorine butterfly valvestainless steel wafer butterfly valveStainless Steel Flanged Butterfly ValveEccentric soft sealing flange butterfly valveElectric three-eccentric metal hard seal butterfly valvePneumatic Flanged Butterfly ValvePneumatic Wafer Butterfly ValveThree eccentric metal seals wafer butterfly valveULC butterfly valve reportInflatable Butterfly ValveHigh Performance Butterfly ValveGrooved butterfly valvesElectric soft sealing wafer butterfly valveDouble flange fluorine lined butterfly valveHandle Aluminum Butterfly ValveWorm Gear Aluminum Butterfly ValveFull PTFE lined wafer butterfly valveOne stem no-pin wafer butterfly valveMulti standard Aluminum handle wafer butterfly valveMulti standard soft seat aluminum lever coated discwafer type butterfly valveResilient Seated Butterfly ValveMulti standard soft seat wafer type butterfly valveWafer PTFE seat butterfly valveWorm Gear Operated Lug Butterfly ValveStainless Steel wafer Butterfly ValvePneumatic Wafer Butterfly ValveWafer Type Metal Seat Butterfly ValveLug type manual wafer butterfly valve without pinAluminium Handle Lug Butterfly ValveWorm Gear Operated Flange Butterfly ValveLever Operated Flange Butterfly ValveButterfly valve stemButterfly valve discButterfly valve seat
- Ball valve
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- High platform flange ball valveCast Iron Ball ValveSS Thread Ball ValvesThree Piece Type Ball ValveAPI Ball ValveStainless Steel 3PC Ball ValvePTFE Seat Flanged Ball ValveForge Steel Fully Welded Ball ValveMetal Seat Ball Valvesfixed ball valveFlange connection ball valve3PC Type Ball Valve With Internal Thread Q11F/H-1000WOGThree Way Ball ValveANSI API Cast Steel And Stainless Steel Flange Ball valveTwo-PCS Type Thread Ball Valve
- 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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- DN800 Slow Closing Check ValveDN800 Rubber Disc Check ValveButterfly Buffering Check Valvecheck valve with counter weightSilent Check ValveStainless Steel flange Check ValveSwing Check ValveSingle Chip Check Valve H74WStainless Steel Wafer Check ValveSwing Start Check ValveFoot check valveAPI Swing Check ValveWCB Swing Check ValveCheck ValveLifting Check ValveBottom ValveHammer Diminish Noises Check ValveWafer Check ValveDuctile Iron 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
What are the three types of butterfly valves?
Midline butterfly valve stem axis line and butterfly plate center plane in the same plane and with the valve body pipeline center line vertical intersection, and the butterfly plate two side area for the stem axis symmetry. Midline butterfly valve is generally made in the form of rubber lining, which is widely used in medium and small butterfly valves because of its simple structure, center symmetry (type I) bi-directional sealing effect, and smaller flow resistance and switching torque. But the shaft head is often in the friction state, wear faster than other parts, easy to leak here, so the rubber-lined butterfly valve is sometimes lined with teflon film in the shaft head to reduce friction or increase the spring to compensate for wear and so on. Obviously, the centerline type such as made metal to metal, to seal some difficulties, tilt plate and offset plate butterfly valve shaft head without friction, but their flow resistance and sealing torque are greater than the center symmetric butterfly plate.
(2)Double eccentric butterfly valve
Double eccentric butterfly valve, in order to improve the situation of single eccentric, the valve shaft is offset by a distance e, so that the line between the shaft center and the sealing point and the sealing surface is at an obtuse angle (more than 90°), so that there is no interference when sealing, and the more it is closed, the tighter it is, producing a greater sealing surface compression force. The feature of double eccentric is that when the valve is opened, the sealing surface of the butterfly plate can be quickly detached from the valve seat, and the contact scraping effect is greatly reduced, and it can be made into a metal sealed valve.
Double eccentric butterfly valves can be designed in the form of rubber, PTFE and metal hard seal. For example, C-shaped, O-shaped or U-shaped genus seal ring and other forms.
(3) Single eccentric butterfly valve
Single eccentric butterfly valve valve shaft deviates from the center plane of the butterfly plate to produce an eccentric h, so that the upper and lower ends of the butterfly plate against the valve shaft no longer become a rotary axis, eliminating the friction and wear of the upper and lower axis ends to produce leakage. The sealing effect is better, but the sealing effect is not consistent in both directions. Generally, the forward direction (flowing from the valve shaft to the sealing surface) is easy to seal, while the reverse direction is easy to leak because there is no supporting effect of the sealing surface. But the use of rubber soft seal, the use of its elasticity, can be very good to achieve a two-way seal. Since the sealing contact mechanism belongs to "ball in cone" (ball in cone), the butterfly plate always has two points that cannot be out of contact under each opening degree, and when used for adjustment, these two points will wear more than other parts, which will have a negative impact on the seal. If it is made into a metal hard seal, two positive cone fits, when turning the butterfly plate, the sealing surface will interfere and there will be difficulties in switching.