One-way flow control valve GRLA-1/2-QS-12-RS-D With knurled screw and lock nut Valve function=One-way flow control function, Pneumatic connection, port 1=QS-12, Pneumatic connection, port 2=G1/2, Adjusting element=Knurled screw, Mounting type=(* Threaded, * with external (male) thread)