Check Valve
The check valve is a special valve that prevents the backflow of mud fluid, etc. It can be used to protect the pump in the case of shutdown. The valve adopts spring precompression type structure, which is mainly composed of valve body, Fan body, fan seat, gland and other parts. The valve is designed and manufactured according to API Spec 6A standard, with good self-sealing effect and long service life of Fan rubber.
Specification
Working peeasure Mpa(Psi) | Nominal Diameter mm（inch） | Specification Level | Performance level | Material Grade |
21MPa(3000Psi) | 80(3-1/8)、65(2-9/16)、 52(2-1/16) | PSL1 ~ 4 | PR1 ~ 2 | AA、BB、CC、DD、EE、FF |
35MPa(5000Psi) | 80(3-1/8)、65(2-9/16)、 52(2-1/16) | PSL1 ~ 4 | PR1 ~ 2 | AA、BB、CC、DD、EE、FF |
70MPa(10000Psi) | 52(2-1/16) | PSL1 ~ 4 | PR1 ~ 2 | AA、BB、CC、DD、EE、FF |
105MPa(15000Psi) | 78(3-1/16) 、65(2-9/16) 52(2-1/16) | PSL1 ~ 4 | PR1 ~ 2 | AA、BB、CC、DD、EE、FF |
140MPa(20000Psi) | 78(3-1/16) 、65(2-9/16) 52(2-1/16) | PSL1 ~ 4 | PR1 ~ 2 | AA、BB、CC、DD、EE、FF |
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