Description

Operation The check section allows free flow into the actuator then holds and locks the load against movement. The pilot assisted relief valve section will give controlled movement when pilot pressure is applied. The relief section is normally set to open at a pressure at least 1.3 times the maximum load induced pressure but the pressure required to open the valve and allow movement depends on the pilot ratio of the valve. For optimization of load control and energy usage, a choice of pilot ratios is available The pressure required to open the valve and start actuator movement can be calculated as follows: Pilot Pressure = (Relief Setting) - (Load Pressure) Pilot Ratio Features Cartridge is economical and fits simple cavity. Allows quick, easy field service - reduces down time. Interchangeable with pilot check valve of a similar size. Pilot Ratio 3.5:1 (standard) Best suited for applications where load varies and machine structure can induce instability. 8:1 Best suited for applications where the load remains relatively constant.