Single Effect Overcenter Valve
A single-acting counterbalance (overcenter) valve designed to hold loads securely and prevent uncontrolled descent in single-acting hydraulic circuits. Available in aluminium or steel manifold construction, with a choice of pilot ratios to suit your application.
Key Specifications:
- Valve type: Single effect overcenter
- Max operating pressure: 275 bar (aluminium manifold) / 350 bar (steel manifold)
- Port connections: Female BSPP — 1/4", 3/8", or 1/2"
- Max flow: 30 l/min (1/4"), 40 l/min (3/8"), 60 l/min (1/2")
- Standard pilot ratio: 4.25:1 (8:1 and 11:1 available on request)
- Setting range: X series 30–210 bar / Y series 60–350 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 or anodised aluminium
Adjustment options: Steel cap (std) or tamper-proof cap
| Port Size (V-C) | ØS (mm) | Weight Alloy (kg) | Weight Steel (kg) | Max Flow (l/min) | Pilot Ratio |
| 1/4" BSPP | 6.5 | 0.7 | 1.4 | 30 | 4.25:1 |
| 3/8" BSPP | 6.5 | 0.7 | 1.4 | 40 | 4.25:1 |
| 1/2" BSPP | 6.5 | 0.8 | 1.9 | 60 | 4.25:1 |
