Frequently Asked Questions

What happens to the pilot-to-open check valve if I have back pressure in my system?

Backpressure at the inlet (port 2) directly opposes pilot pressure, effectively increasing the amount of pressure required to open the valve. If the backpressure is flow related (as in a meter-out flow control) the result could be a severe ratcheting movement of the actuator. Using vented load holding valves will prevent this problem.