Shuangda Hydraulic Machinery is one of the professional electrohydraulic operated directioal valve manufacturers and suppliers in China,Website:://.chinahydraulic-valve.com, welcome to buy cheap and low price pilot check valve made in China from our factory.Usage and characteristic  Electo-hydraulic operated directional vavle is an improved valve which is combined by a solenoid operated directional valve and hydraulic controlled directional valve. When the coils are electrified, pilot valve will convert the direction of the pilot oil and the oil will push the spool of the hydraulic controlled directional valve so that to change the flow direction of the oil in the hydraulic system.With the big thrust wet electromagnets and optimized flow way of the valve, electro-hydraulic operated directional valves have the features of high pressure, big flow, small pressure loss, energy saving, strong anti-pollution ability and light weight.It is easy to combine or change the oil controlling way and drain way by lock and unlock the screw.