Check valves
Valves
Check valves allow compressed air or hydraulic fluid to pass in one direction only and close automatically on pressure drop or flow reversal. The range covers pneumatic and hydraulic versions with G ports from M 5 to G 2", with the hydraulic check valve RUCK HD series handling pressures up to PN 350 and selectable cracking pressures from 0.3 to 8.0 bar. Stainless steel versions (RUCK 12 SS, ES) are available for aggressive media. Pneumatic quick exhaust valves of the SV series with replaceable FKM membranes complete the programme.
| Series | Port | Pressure rating | Cracking pressure |
|---|---|---|---|
| RUCK 12 HD | G 1/2" | PN 350 | 0.4-0.7 bar; 1, 3, 5, 8 bar |
| RUCK 34 HD | G 3/4" | PN 350 | 0.4-0.7 bar; 1, 3, 5, 8 bar |
| RUCK 10 HD | G 1" | PN 350 | 0.4-0.7 bar; 1, 3, 5, 8 bar |
| RUCK 114 HD | G 1-1/4" | PN 300 | 0.7-1 bar; 3, 5, 8 bar |
| RUCK 112 HD | G 1-1/2" | PN 300 | 0.7-1 bar; 3, 5, 8 bar |
| RUCK 20 HD | G 2" | PN 200 | 0.3 bar |
| RUCK 112 HD ES | G 1-1/2" | PN 250 | Stainless steel, corrosion-resistant |
Typical applications: Hydraulic power units and presses (RUCK HD, PN 200-350), pneumatic cylinder controls with quick exhaust (SV), compressed air networks with reservoir protection, food and pharmaceutical machinery (stainless steel variants ES), and chemical and process plants requiring backflow protection on pipe fittings.