Both the 1⁄4
NPT “T” Port Check Valve (part number 500171DE) and the SAE4
(part number 500173DE) are recommended on singleacting circuits where there is more than one directional valve per power source.
These check valves are ideal for use in circuits where
return line pressure fluctuations may affect released clamps.
Use this anytime a return line pressure spike could cause unclamped actuators to move and
affect operator safety. They are designed specifically for DESTACO’s No.
100969DE Directional Control Valves.
The SAE4 (500174DE) “P”
port check valves are required on all singleacting or doubleacting circuits where there is more than one directional valve per power source.
These check valves prevent power source pressure fluctuations from affecting the pressure
in clamped circuits. Without this check valve, shifting the directional control valve in one circuit will cause a temporary loss of clamping pressure in the other circuit.
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