TOBO STEEL GROUP CHINA
TOBO STEEL GROUP CHINA
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High pressure api 6d class 200 cf8 swing 100mm 4" 8" f304 ss 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
Face to face dimensions as ANSI B16.10
End flange dimension as ANSI B16.5
Pressure-temperature ratings as ANSI B16.34
Pressure test as API 598
Applicable Medium: water ,gas,oil,and other causticity medium.
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.
Top Hinged
Tilting disk
Lift Type
Piston Type
Ball 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