Check Valve
Check valves are one-way or nonreturn valves that open with fluid movement and pressure, and close to prevent backflow of the pressure to upstream equipment such as pumps and compressors. In fact, check valves allow the fluid to flow in only one direction.
The most common tactic for an inline check valve is to prevent the backwards transmission of pressure, rather than flow, and it's pressure that creates flow anyway. An example of this tactic is the check valve typically installed after a pump in a system which employs an accumulator
Different types of commonly used check valves are swing check valve, wafer check valves ,ball check valves , nonslam axial check valve (Disc Check Valve ) , dual plate check valves.
Specification(s)
| Size | ½” To 24” | ½” To 20” | ½” To 12” | ½” To 12” | ½” To 8” | ½” To 8” |
|---|---|---|---|---|---|---|
| ANSI Class | 150 | 300 | 600 | 900 | 1500 | 2500 |
| TEST PRESSURE BODY(KG/CM2) | 32 | 79 | 156 | 236 | 392 | 652 |
| TEST PRESSURE SEAT (KG/CM2) | 22 | 57 | 115 | 172 | 287 | 477 |
| MATERIAL OF CONS. | A216GR. WCB, WC5 WC6, WC9 LCB, CF8, CF8M, CF3 CF3M, C.I | |||||
| DESIGN STANDARDS | API 600, BS 1414, ANSI B 16.34, ANSI 16.10, ANSI B16.25 | |||||
| TESTING STANDARDS | API 598 | |||||
| END CONNECTION | FLANGED AND BUTTWELD | |||||