Double Effect Overcenter Valve for Closed Centre
A double-acting counterbalance valve specifically designed for closed-centre hydraulic circuits — where a standard overcenter valve would lock the motor in a centred spool condition. Available in aluminium (275 bar) or steel (350 bar) manifold construction.
Key Specifications:
- Valve type: Double effect overcenter — closed centre configuration
- Max operating pressure: 275 bar (aluminium) / 350 bar (steel)
- Port connections V & C: Female BSPP — 1/4", 3/8", or 1/2"
- Max flow: 40 l/min (all port sizes)
- Pilot ratio: 4.1:1 (8:1 and 11:1 available on request)
- Setting range: X series 50–210 bar / Y series 100–350 bar
- Standard setting: 200 bar (X) / 300 bar (Y)
- Fluid temperature: −20 °C to +90 °C
- Ambient temperature: −20 °C to +50 °C
- Filtration standard: ISO 4406
- Standard seals: NBR 70 Shore A | Viton available on request
- Manifold material: Raw aluminium (option 1) or zinc plated steel (option 3)
- Adjustment options: Steel cap (std) or tamper-proof cap
| Port Size (V-C) | Weight Alloy (kg) | Weight Steel (kg) | Max Flow (l/min) | Pilot Ratio |
| 1/4" BSPP | 0.8 | 1.7 | 40 | 4.1:1 |
| 3/8" BSPP | 0.9 | 1.9 | 40 | 4.1:1 |
| 1/2" BSPP | 0.9 | 1.9 | 40 | 4.1:1 |
