Counter Balance Valves
Counterbalance Valve Setup — Standard
Relief setting: Set the valve high enough to stop motion at the maximum expected actuator pressure. As a rule of thumb, use 1.3 × maximum load pressure (e.g., 180 bar load → set ≈ 234 bar).
Pilot ratio (varying loads): Use low ratios (3:1 or 4.25:1) when loads vary widely
Pros: stable, precise control. Cons: higher pilot pressure, lower efficiency
Pilot ratio (constant loads): Use high ratios (8:1 or 10:1) when loads are relatively constant
Pros: lower pilot pressure, faster response, higher efficiency. Cons: less stability/precision with changing loads
Sizing: Do not oversize. Counterbalance valves need some pressure drop to operate correctly; there’s no “too much drop” operating limit for these valves
Placement: Install the valve at or near the actuator to maximize load-holding protection if a hydraulic line fails
Circuit compatibility: Do not use counterbalance valves with closed-center directional control valves; trapped pressure between the DCV and actuator can pilot the valve open and cause unintended load motion