One-way flow control valve GRLA-1/8-QS-6-MF-D For exhaust air flow control, with high flow rate. Valve function=One-way flow control function, Pneumatic connection, port 1=QS-6, Pneumatic connection, port 2=G1/8, Mounting type=(* Threaded, * with external (male) thread), Standard nominal flow rate in flow control direction=400 l/min