- 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
Do you know the difference between soft seal gate valve and hard seal gate valve?
What is a soft seal gate valve?
Soft seal gate valve, industrial valve, soft seal gate valve opening and closing member is the gate, the direction of movement of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully open and fully closed, can not be used for regulation and throttling. The gate has two sealing surfaces, the most commonly used mode gate valve two sealing surfaces form a wedge, wedge angle varies with the valve parameters, nominal diameter DN50 ~ DN1200, the use of temperature: ≤ 200 ℃.
The principle of soft seal gate valve:
Wedge gate valve gate can be made into a whole, called steel gate; can also be made into a gate that can produce a slight deformation, to improve its craftsmanship, to compensate for the deviation of the sealing surface angle in the process of processing, this gate is called a flexible gate.
Soft seal gate valve is divided into two kinds of soft seal gate valve and concealed soft seal gate valve. Usually, there are trapezoidal threads on the lift rod, and the rotary motion is changed into linear motion, that is, the operating torque is changed into operating thrust, by the nut in the middle of the gate plate and the guide groove on the valve body. When the valve is opened, the passage of fluid is completely open when the height of the gate lift is equal to 1:1 times the valve's passage diameter, but this position cannot be monitored during operation. In actual use, the top point of the valve stem is used as a marker, i.e., the position of open immobility, as its fully open position. In order to take into account the locking phenomenon due to temperature change, the valve is usually opened to the apex position and then reversed by 1/2-1 turn as the fully open position. Therefore, the full open position of the valve is determined by the position of the gate (i.e., stroke).
What is a hard seal gate valve?
The opening and closing part of the hard seal gate valve is the gate, the direction of movement of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully open and fully closed, not for regulation and throttling. The gate has two sealing surfaces, the most commonly used mode gate valve with two sealing surfaces to form a wedge.
When the hard seal gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure will be the sealing surface of the gate to the other side of the valve seat to ensure the sealing surface sealing, which is self-sealing. Most of the gate valves are forced to seal, that is, when the valve is closed, rely on external force to force the gate to the seat, to ensure the sealing surface of the seal.
Soft seal gate valves and hard seal gate valves are the two main categories in the gate valve series.
Hard seal and soft seal can sometimes make up for each other, and sometimes be independent of each other.
The difference between soft seal gate valve and hard seal gate valve is as follows:
1、Sealing material
Soft seal gate valve: sealing side of the metal material, the other side of the resilient non-metallic materials, called "soft seal". This seal has good sealing performance, but not high-temperature resistance, is easy to wear, and mechanical properties are poor.
Hard seal gate valve: the two sides of the seal are made of metal or other hard materials, called "hard seal". The sealing performance of this seal is poor but has high-temperature resistance, wear resistance, and good mechanical properties.
2, the structure mechanism
Hard seal gate valve is a metal-to-metal seal, the sealing ball and seat are metal. Processing accuracy and process is more difficult, generally used for high pressure, generally above 35MPa. Soft seal gate valve is a seal between metal and non-metal, such as nylon \ tetrafluoroethylene, manufacturing standards are the same.
3, equipment selection
Soft and hard seal gate valve selection is mainly based on the process medium, temperature, and pressure. General media containing solid particles or abrasion or temperature higher than 200 degrees. It is best to use a hard seal. The diameter greater than 50 valve pressure difference is large, consider opening the valve torque. , when the torque is large, should be selected fixed hard seal ball valve, whether soft seal or hard seal, its sealing grade can reach 6.
4, the use of conditions
Soft seal gate valves generally have a high seal, while hard seals can be high or low depending on the requirements; soft seals need to be fireproof because the material of soft seals can leak at high temperatures, while hard seals do not have this problem; seals can usually be manufactured at very high pressures, but soft seals cannot; soft seals cannot be used in some cases because of the flowing medium. Finally, hard seal valves are usually more expensive than soft seals. As for manufacturing, there is little difference between the two; the main difference is the valve seat, which is non-metallic for soft seals and metallic for hard seals.
With the continuous development of our industrial market, it is necessary to understand the difference between soft seal gate valve and hard seal gate valve, which may not only affect productivity but also greatly affect the economic benefits.
5, structural characteristics.
The general gate valve used in the market for a long time is generally leaky or rusty phenomenon, WESDOM the introduction of high-tech rubber and valve manufacturing technology produced by the resilient seat seal gate valve, to overcome the general gate valve poor sealing, rust, and other defects, resilient seat seal gate valve use the resilient gate plate to produce a trace of elastic deformation compensation effect to achieve a good sealing effect, the valve has a light switch, reliable sealing, elastic memory The valve has the advantages of light opening and closing, reliable sealing, elastic memory, and good service life.
Whether it is a soft seal gate valve or hard seal gate valve, in the process of use, we should pay attention to the following points.
①Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
② Double gate valve should be installed vertically (i.e., the stem is in a vertical position, handwheel at the top).
③ gate valve with bypass valve should be opened before opening the bypass valve (to balance the pressure difference between the import and export and reduce the opening force).
④Gate valve with transmission mechanism should be installed according to the product instruction manual.
⑤ If the valve is frequently opened and closed, it should be lubricated at least once a month.
Complete solutions for Industrial valves