Single Pilot Operated Check Valve
A compact, manifold-mount single pilot operated check valve for load-holding and cylinder locking applications. It allows free flow from C1 to V1 and prevents reverse flow until sufficient pilot pressure is applied at V2, at which point the check opens in a controlled manner.
The block-body design provides a rigid, leak-free mounting platform. Available in port sizes from 1/4" to 3/4" BSPP with a choice of cracking pressure and an option for an O-ring on the pilot piston to minimise internal leakage.
Key Specifications
- Type: Single pilot operated check valve, manifold mount
- Port sizes (V1-V2 / C1-C2): 1/4", 3/8", 1/2", 3/4" BSPP
- Max. pressure: 350 bar
- Max. flow: 20 l/min (1/4") up to 100 l/min (3/4")
- Pilot ratio: 4:1 to 5.5:1 (varies by port size — see datasheet)
- Cracking pressure: 3 bar (standard, Y) | 1 bar (X)
- Seal options: NBR 70 Shore A (standard) | Viton on request
- Pilot piston O-ring: available (M) or without (N)
- External finish: Zinc plated
- Fluid temperature: -20°C to +90°C
| Thread V1-V2 | Thread C1-C2 | Max. Pressure (bar) | Max. Flow (l/min) | Pilot Ratio |
| 1/4 BSPP | 1/4 BSPP | 350 | 20 | 5.5:1 |
| 3/8 BSPP | 3/8 BSPP | 350 | 35 | 5.5:1 |
| 3/8 BSPP | 3/8 BSPP | 350 | 45 | 5:1 |
| 1/2 BSPP | 1/2 BSPP | 350 | 50 | 5:1 |
| 1/2 BSPP | 1/2 BSPP | 350 | 70 | 4:1 |
| 3/4 BSPP | 3/4 BSPP | 350 | 100 | 4:1 |
