One-Way Flow Control Valve Grla-1/8-QS-8-Mf-D for Exhaust Air Flow Control, with High Flow Rate. Valve Function=One-Way Flow Control Function, Pneumatic Connection, Port 1=Qs-8, Pneumatic Connection, Port 2=G1/8, Mounting Type=(* Threaded, * with External (Male) Thread), Standard Nominal Flow Rate In Flow Control Direction=475 L/Min, Festo