Check valve

Specification

Valve size: NPS2 ~ NPS24 DN50 ~ DN600

Pressure rating: 150LB, PN6 ~ PN25

Material: Ductile iron, carbon steel

Design and manufacturing standards: GB/T 13932-92, GB/T 12236-2008

Stress test standard: JB/T 9092-1999, API 598

Fire safety test standards: API 607, API 6FA, BS EN ISO 10497

Quality / Product Certification: ISO 9001, API 6D, PED 2014/68/EU, EAC, ATEX and OSHAS 18001

Safety and reliability: in line with SIL3

Sealing level: API 598 (zero leak), grade six (FCI 70-2)

Characteristics

The check valve refers to a valve that automatically opens and closes the valve flap by means of the flow of the medium itself, and is used to prevent the back flow of the medium, which is also called a check valve, a check valve, a reverse flow valve, and a back pressure valve. The check valve is an automatic valve whose main function is to prevent backflow of the medium, prevent the pump and drive motor from reversing, and discharge the container medium. Check valve This type of valve is characterized by allowing only the medium to flow in one direction and preventing the flow in the opposite direction. Usually, the valve is automatically operated, and the valve flap is opened by the fluid pressure flowing in one direction; when the fluid flows in the opposite direction, the fluid pressure and the self-reclosing valve flap of the valve disc act on the valve seat to cut off the flow.