Vertical horizontal water full opening swing type wcb casting
flanged non return check valve
What is a Check Valve?
The valve that used to prevent backflow in a piping system is known
as a check valve. It is also known as a non-return valve or NRV.
The pressure of the fluid passing through a pipeline opens the
valve, while any reversal of flow will close the valve.
It allows full unobstructed flow and automatically shuts as
pressure decreases. The exact operation will vary depending on the
mechanism of the valve.
Quick Details
Product Name | CHECK VALVE |
Material | stainless steel |
Color | nickel white |
Standard | DIN GB JIS ANSI |
Class | 150LB(16)~600LB(2500) |
Body and Ball Material | CF8 CF3 CF8M CF3M WCB PVC UPVC PP |
Thread | -29~150(PTFE), -29~200( PTFE+GLASS), -29~300(J2 PPL) |
Steam Seat and Gasket | PTFE |
Stainless Steel Check Valve Standards
Design and Manufacture: BS1868 or API6D
Inspection and Test: API 598 or API6D
End flange dimension: ASME B16.5, ASME B16.47A, MSS SP-44; ASME
B16.47B, API605
BW end dimensions: ASME B16.25
Face to face and end to end: ASME B16.10
Pressure-temperature ratings: ASME B16.34
Wall tickness dimension: API600 and BS1868
Stainless Steel Check Valve Application:
Valve is used for preventing the back-going of medium in pipelines
and equipments, and the pressure of medium will bring the result of opening and closing automatically.
When the medium is back-going, valve disc will automaticaly closed to
avoid accidents.
Stainless Steel Check Valve Test Pressure
Test Item | Shell Test | Seal Test | Back Seal Test | Air Seal Test |
Medium | Water | Air |
Unit | MPa | lbf/in2 | MPa | lbf/in2 | MPa | lbf/in2 | MPa | lbf/in2 |
Pressure (Class) | 150 | 3.1 | 450 | 2.2 | 315 | 2.2 | 315 | 0.5-0.7 | 60-100 |
300 | 7.8 | 1125 | 5.6 | 815 | 5.6 | 815 |
400 | 10.3 | 1500 | 7.6 | 1100 | 7.6 | 1100 |
600 | 15.3 | 2225 | 11.2 | 1630 | 11.2 | 1630 |
900 | 23.1 | 3350 | 16.8 | 2440 | 16.8 | 2440 |
1500 | 38.4 | 5575 | 28.1 | 4080 | 28.1 | 4080 |
Types of Valves
The type of disk will decide the type of valve. Most common types
of Check valves are
Swing Type.
Lift Type
Dual Plate Type
Stop Check Valve
Swing Check Valve
The disc in a swing type valve is unguided as it fully opens or
closes. This Valve operates when there is flow in the line and get
fully closed when there is no flow. Turbulence and pressure drop in
the valve is very low.
Disk and seat designs can be of metal to metal or metal to
composite.
The angle between the seat and the vertical plane is known as the
seating angle and varies from 0 to 45 degrees.
Usually, the seat angles are in the range of 5 to 7 degrees. Larger
seat angles reduce the disc travel, resulting in quick closing,
thus minimizing the possibility of water hammer. A vertical seat
has a 0-degree angle.
The swing type valve allows full, unobstructed flow and
automatically closes as pressure decreases. Usually installed in
combination with gate valves because they provide relatively free
flow combinations.
A basic swing type valve consists of a valve body, a bonnet, and a
disk that is connected to a hinge.
Parts of Non-Return Valve
It is consists of body, cover, disk, hinge pin, and seat ring. In
the image below you can see the parts of the valve.
Packing Details:
We choose suitable wood cases according to different valves and
arrange skilled workers to pack in case of bruise. Long term
cooperated forwarder will book space, clear customs and transport
for us without delay. There are three ways for transportation, by
sea, by air and by train. We will arrange transportation according
to customers' needs.
Delivery Details: According to the order, 7~60days
