Nps 4 Class 2500 Duplex Steel Flange Check Valve

The API standard check valve produced by our company is designed and manufactured in full accordance with American standards, with beautiful structure and advanced. Automatically opens and closes the valve disc depending on the flow of the medium itself, which is used to prevent the medium from flowing back to the valve, also known as check valve and countercurrent valve. Its main function is to prevent the medium from flowing back, reverse rotation of pump and driving motor, and release of container medium.


API Check Valve Specification

Main material

API Check Valve Standard and Features

Std:
1.Design & manufacture:API 6D,BS 1868,ASME B16.34
2.Flange END:ASME B16.5
3.Face To Face :ASME B16.10
4.Pressure-temperature rating:ASME B16.34
5.Butt END:ASME B16.25
6.Inspection & Test:API 598
7.Also available per NACE MR 0175,NACE MR 0103


Feature:
1. Full bore or reduced bore
2. Bolted Cover,Pressure seal cover
3. Swing or Lift type
4. Renewable seat ring or Integral Seat Ring
5. Non-penetrate disc shaft
6. Horizontal or vertical service
7. Flanged of Butt welded end
8. The product has reasonable structure, reliable sealing, excellent performance and beautiful design.
9. The sealing surface is covered with STL, which is resistant to friction, corrosion and long service life.
10. Part material, flange and butt welding size can be selected according to the current working conditions or user requirements to meet the needs of various projects.
11. Easy to disassemble and maintain.
12. Horizontal installation, not vertical installation.
13. Unidirectional sealing to prevent medium backflow.
14. Vertical lifting structure, disc sealing form is the same as the globe valve
15. The design of all valves can meet the requirements of DIN and applicable customer requirements