Differential Pressure Regulator Lrll-M5-QS-4 without Manometer, with Male Thread and Qs Plug Connector. Controller Function= (* Differential Pressure, Constant, * with Return Flow) , Pneumatic Connection, Port 1=M5, Pneumatic Connection, Port 2=Qs-4, Mounting Type=Threaded, Nominal Flow Rate Open=30 L/Min, Festo