wafer type check valve
Description
Wafer check valve is an automatic valve that drives the valve disc to open and close through the flow of the medium itself. It is used to prevent the medium from flowing back, the pump from reversing, and the pressure relief of the container from being out of control. It adopts a wafer connection structure and is fixed between the pipe flanges by flanges or bolts. It has the characteristics of small size, light weight, and convenient installation. It is suitable for pipeline systems with limited space.
Core structure and type
Structural type: Lift type (H71 type): The valve disc moves up and down along the vertical axis, relying on the medium pressure to open, and the spring assists in closing. It is suitable for small-diameter high-pressure scenes (DN15~350mm); Swing type (H44 type): The valve disc rotates around the hinge axis, which is suitable for large-diameter low-flow pipelines (DN50~1200mm), with low flow resistance and small closing impact; Butterfly double disc (H76 type): The double disc design is combined with spring buffering, with fast closing speed (<1 second), which significantly reduces the water hammer effect.
Key components:
Body material: stainless steel (304/316L), carbon steel (WCB/WCC) or low-temperature steel (LCB), suitable for different media and environments;
Sealing technology: metal hard seal (welded Stellite alloy) or elastic soft seal (PTFE/graphite), meeting ANSI Class V/VI leakage standards.
wafer type check valve specification
|
Valve Design |
: API 594 / API 600(ISO 10434) / API 6D(ISO 14313) / API 602 / API 603 / API 608 / API 609 / IS 780 / BS 1414 / BS 14846 / BS 1868 / BS 1873 / BS 5351 / ASME B 16.34(BS 5351) / DIN 3352 / DIN 3356 / DIN 3357 |
||
|
Pressure Testing |
: API 598 / API 600 / API 6D |
||
|
Face To Face |
: ANSI B 16.10 |
||
|
End Connection |
: Screwed AS PER BSP/BSPT/NPT, Weld AS PER SW/BW, Flange AS PER RF/RTJ |
||
|
Flange Connection |
: ANSI B 16.5 (For NPS≤24) / ANSI B 16.47 SERIES B, ANSI 16.47 SERIES A, MSS SP-44 (For NPS >24) |
||
|
Butt Weld End |
: ANSI B 16.25 |
||
|
Socket Weld End |
: ANSI B 16.11 |
||
|
Screwed End |
: ANSI B 1.20.1(BSP/NPT) |
||
|
Wall Thickness |
: API 600 / BS 1868 |
||
|
Pressure Rating |
: AS PER ANSI 125#, 150#, 300#, 400#, 600#, 800#, 900#, 1500#, 2500# |
||
|
Engineering Option |
: Gear Operated, Electrical Actuated, Pneumatic Actuate |
||
|
Size Range |
: AS PER NPS 2" - 48" |
||
wafer type check valve
Advantages
Anti-water hammer design: Spring buffer (such as the double spring structure in patent CN 222798224 U) or butterfly double-flap diversion is used to reduce the impact of backflow and extend the life of the valve;
Compact and efficient: The structural length is only 1/3 of the traditional flange check valve, and the weight is reduced by 40%~60%, saving installation space;
Quick response: The valve flap closing time can be controlled within 0.3~1 second to prevent the backflow of the medium from causing system pressure fluctuations.
Application
Municipal water supply and drainage: Prevent the backflow of the medium after the water pump is shut down to protect the safety of the pump unit;
Petrochemical: One-way flow control of the inlet and outlet pipelines of the high-pressure reaction device;
Cryogenic engineering: Anti-backflow of liquefied natural gas (LNG) transmission system;
Power system: Prevent steam backflow in the boiler feed water pipeline.
Hot Tags: wafer type check valve, China wafer type check valve manufacturers, suppliers, factory, tilting type check valve, iron check valve, Swing Valve, cast iron non return valve, duckbill non return valve, stainless steel double check valve