Pressure Seal Check Valve

Pressure Seal Check Valve

ZhengFeng's pressure sealed check valves are intended for high pressure, high temperature applications in all types of fluid except where severe.

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The pressure seal check valves are designed in accordance with BS1868 and ASME B16.34 for service of high temperature and high pressure and are widely used in fossil fuel power plant. Compared with bolted bonnet joint valves, it provides absolute reliable sealing of the bonnet joint, so that the pressure seal check valves are more compact and rigid as well as maintenance cost-effective at high temperature and high pressure service.

It is an automatic check 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.  


1. Only one sealing face is designed on the valve body and valve disc;

2. Full stellite overlay seat sealing surface;

3. Good for manufacturing process and easy to maintain;

4. Use flexible and woven graphite collaboration type packing

5. Absolute bonnet joint leak proof

6.  Optional by-pass design

7. Optional designed with a Damping Cylinder.

Product Range:

Body material: carbon steel, stainless steel, alloy steel, etc.
Nominal diameter:1/2"~24"

Pressure range:Class150~2500(PN10~PN420)

End Connection: RF, RTJ, BW

Working temperature:-29℃~+560



Valve Type

Pressure Seal Check Valve

Valve Material

carbon steel, stainless steel, alloy steel, etc

Valve Test

100% quantity tested before delivery

Valve Guarantee

18 months from the date of dispatch ex works,   or 12 months from date of commodity installation.

Valve Painting

Customer request

Valve Package

Wooden case


No requirement

Valve Certificate

API 6D/CE/ISO9001/ISO14001

Delivery Detail

Shipped in 4 or 6 weeks after payment



Payment Terms


Certificate Offered

Packing List,Commercial   Invoice,Test Reports and Material Certificates,Certificate   of quality and quantity, Seller’s Certificate of Guarantee

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