The C, CB, CBF and CO Series are instrumentation check valves that let fluid flow in one direction only. The CBF has a built-in filter, the standard body is SS316, and the C Series is also available in brass.


| Pressure Rating | 6,000 psig (414 bar) CWP (C 1/8" to 3/4" SS316, CO) / 3,000 psi CWP (CB, CBF, C brass) |
| Cracking Pressure | 1/3 to 25 psi (C, CO) / 1 to 120 psi (CB, CBF) |
| Cv Value | 0.18 to 6.56 (C) / 0.43 to 2.65 (CO) |
| Temperature Rating | -57 to 204 °C (by seal material) |
| Body Material | SS316 / brass (C) |
| Filter Rating | 75 / 200 / 380 / 500 µm (CBF) |