Check valves are self-activating valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Check valves use a variety of technologies to allow and stop the flow of liquids and gases.
| DESIGN STD | BS 1868 |
| TESTING STD | API 598 |
| END | SCREWED, SOCKET AND FLANGED |
| MOC | CI, WCB, CF8 OR SS 304, CF8M OR SS316 etc |
| RATING | 150#,300#,600#,800#,1500#,ND-16,ND-40 |
| SIZE RANGE | ½” to 16” |
| Flange to Flange STD | ASME B16.10 for Flanged and ND-40 |
| Flange Dimension Std | ASME B16.10 ,BS10 T/ E, F, ND-16 AND ND-40 |
| Thread and Socket Std | BSP, NPT (thread), ANSI (socket) |
