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Extraction Non-return Valve

Extraction Non-return Valve

Size: 20inch
Class: 300LB
Material: WCB
Connection: RF
Operation: hydraulic actuator

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Extraction non-return valve, swing check valve with counter weight and pneumatic actuator, steam extraction swing check valve with hydraulic actuator, power plant steam extraction swing check.

This type product is mainly used in steam system in 600MW thermal power steam turbine, to prevent the media or the water flow back, to protect the turbine pumps and other important facilities. The performance requirements for medium in pipeline flow, power outages, accidents and other unusual conditions, the valve is closed instantly, closing time less than 0.5 seconds.


Size: 20inch

Class: 300LB

Material: WCB

Connection: RF

Operation: hydraulic actuator

Product features:

1. when the forward flow medium, the cylinder cavity inlet, acting together with the hammer, the valve in the open position of balance. When the medium is the reverse flow, the disc is closed quickly as the cylinder piston cavity pressure relief valve quickly. The closed time is in 0.5 seconds.

2. Surfaced Crl3 series stainless steel or alloy steel makes the valve excellent sealing, good abrasion resistance, reliable and stable sealing performance.

3. Hammer through an extension rod and a shifting fork on the pin shaft, with heavy torque balance and rocker; prevent the occurrence of water hammer phenomenon. When the forward flow of media, help to open the valve, the valve and keep the stable and reduce vibration in operation.

Technical parameters:

Size: 2 inch to 48inch (DN50 to DN1200)

Pressure: Class150 ~ Class 900 ( PN16~ PN100)

Design standard: ASME B16.34, JB/T3595

Face to Face: ASME B16.10, JB/T3595

Applicable temperature: -29 ℃ ~ 593 ℃

Flange end: customer requirements

Test and inspection: API 598 JB/T 9092

The material of main parts:

Body: WCB, WC6, CF8, CF8M, CF8C, CF3, CF3M

Disc / seat: 13Cr+ hard alloy steel (STL6 STL8) or stainless steel or alloy steel

Pin: A182 F6a, F304, F316, F321 and so on.

1.We Are Factory: our factory located in Wenzhou, more than 1000square Meters. Our stuff has more than 8years in offer pipe projects. 

2.Low MOQ:  We are always ready for providing the sample and producing some small orders, in order to meet the business well.

3.OEM Accepted: We can make the products with the client's demand standard or the custom requirement.

4.Complete Service: We are always ready to hear from you, be responding to your enquiry immediately. Our trade manager is always online for you.

5.Good Quality: We have strict quality control system and amounts of testing equipments for different kind of valve, such as size, pressure, working environment etc. We are winning the market reputation with the time goes by.

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