One-way flow control valve GRLZ-1/8-PK-4-B For supply air flow control, with swivel joint. Valve function=one-way flow control function for supply air, Pneumatic connection, port 1=PK-4 with sleeve nut, Pneumatic connection, port 2=G1/8, Adjusting element=Slotted head screw, Mounting type=Threaded