28
NDX VALVE CONTROLLER
Check valve on supply pressure port
Fig. 31 Check valve on supply pressure port (S)
Check valve on supply pressure port (S) is used on double
acting version of NDX (NDX251_) only.
Check valve on supply pressure port (S) shall be used with
double acting actuators only.
CAUTION
If double acting version of NDX (NDX251_) is
installed on single acting actuator, the check
valve must be removed.
9
PNEUMATICS PIPING