Hydraulic Power Pack, Hydraulic Cylinder, Hydraulic Valves manufacturer / supplier in China, offering 4/2 and 4/3 Proportional Directional Valves Pilot Operated with Electrical Position Feedback 4wrh 4wrhe 4wrz 4wrze 10 16 25 32 4wrz10e, High Performance 2-Way Hydraulic Proportional Flow Control Valves 2fre/2fre10-40b, 4-20mA or ± 10V Pilot Operated Hydraulic Proportional Pressure Relief Valve Dbe/Dbem and so on.