Although they are in the same range with in-line check valves, Double Pilot Operated Check Valves are different in that they permit the valve to open normally closed direction or they provide a positive shut-off by means of a specific pilot pressure signal. Fluid is directed towards to one of the valve ports and free flow to the corresponding port. Then by moving the pilot piston the pressure opens opposite check valve and provides a return passage of fluid through the opposite check valve. Pilot Operated Check Valves have excellent seal thanks to the heat treatment applied to internal components.

Double Pilot Operated Check Valves are commonly used with double acting cylinders to block position, to hold and lock work circuits under pressure in case of pipe or line breaking, or to prevent movements on locked systems arising from leakages.