Which parameter describes the 30% increase over load pressure when setting a counterbalance valve for a 10kg load?

Which parameter describes the 30% increase over load pressure when setting a counterbalance valve for a 10kg load?

• A. The load pressure multiplied by 1.3
• B. The load pressure divided by 1.3
• C. A fixed value independent of load
• D. The maximum system pressure

Answer: (A)

The key idea is that a counterbalance valve is set to hold the load by applying a backpressure that is higher than the pressure created by the load itself. By adding a margin, the valve stays closed enough to prevent the load from drifting downward due to leakage, friction, or small position changes, yet will still release when you actively command movement.

If the load pressure needed to hold a 10 kg load is P_load, applying a 30% increase means setting the valve at P_setting = P_load × 1.3. This is exactly “the load pressure increased by 30%,” or the load pressure multiplied by 1.3. That extra 30% provides the required headroom to keep the load in place under real-world conditions.

Dividing the load pressure by 1.3 would lower the hold pressure, which wouldn’t reliably retain the load. A fixed value independent of the load wouldn’t accommodate different weights or cylinder areas, reducing safety and effectiveness. The maximum system pressure is about the overall system capability, not the specific margin above the load pressure used to hold the load.