Max Flow: 30L/min, Max pressure: 350bar, internal pilot,operated type,double acting,line mounting,with manual lever control. 1. Cracking pressure: 0.5 or 4 bar2. CODE Pilot Ratio Threads VUPR/S 14 4.7:1 G1/4" VUPR/D 38 4:1 G3/8"3. If the material of the manifold is steel, you should add "A" before the code. QTFLUID supply other kinds of check valves. For more details,connect with us. Check valve