What happens to the load when a load check valve is functioning correctly?

When a load check valve is functioning correctly, the load remains stable when pressure equalizes. The primary purpose of a load check valve is to prevent the uncontrolled descent of a load in hydraulic systems, particularly when the system experiences a loss of pressure. When the operating pressure in the hydraulic circuit drops, the load check valve prevents the fluid from flowing back and allows the hydraulic pressure to stabilize.

In scenarios where the pressure equalizes on both sides of the load check valve, the valve will remain closed, ensuring that the load doesn't move. This stability is critical for safety and functionality in hydraulic systems, especially during lifting or lowering operations, where it is vital to maintain control over the load position. Thus, when the valve is functioning correctly, it contributes to the system's ability to hold the load securely without unintended movements.