Stainless Steel 316L Swing Type Check Valve DN 20 Class 150
The valve is opened or closed by the valve disc to rotate around the spindle outside the valve seat; and it is an automatic valve when it is automatically opened or closed by the force generated by the medium flowing within the pipeline. Its major function is to prevent the backflow of the medium in the pipeline, reverse rotation of the pump and its driving motor, and discharge of the medium in the container.
Design Features
Compact and reasonable product structure, reliable tightness and good performance;
Smooth fluid passageway and small fluid resistance;
Swing type disc.
Can be designed with a Damping Cylinder.
Rapid closing and flexible actions of the valve disc .
Small closing impact, water hammer is not liable to be generated.
Smooth fluid passageway and small fluid resistance.
Product Range
Body material: carbon steel, stainless steel, alloy steel
Nominal diameter: 1/2"～42"
Pressure range:Class150～2500
End connection: RF, RTJ, BW
Working temperature:-196℃～+560℃
Standards:
- Design and manufacture: BS 1868, API 6D, ASME B16.34
- Face to face/end to end: ASME B16.10, API 6D, DIN 3202
- Pressure temperature rating: ASME B16.34
- BW end dimension: ASME B16.25
- End flange dimension: ASME B16.5, ASME B16.47
- Inspection and test: ISO 5208, API 598
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
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Swing Type.
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Lift Type
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Dual Plate Type
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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
Product Tags:
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Stainless Steel 316L Swing Type Check Valve DN20 Class 150 RF RTJ BW Connection Images
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