Shuangda Hydraulic Machinery is one of the professional electrohydraulic operated directional valve manufacturers and suppliers in China,Website:://.chinahydraulic-valve.com, welcome to buy cheap and low price rexroth electro-hydraulic directional valve, rexroth electro-hydraulic operated directional valve, electro-hydraulic directional valve made in China from our factory. Usage and characteristic Electro-hydraulic operated directional valves WEH type is composed by a pilot solenoid valve and a hydraulic valve as the main valve. It is used to control the direction and circulation of fluid flow. It is widely used in big flow hydraulic system because it can control the direction of the big flow by a small pilot valve. Hydraulic control valve type WH is used to control the direction and circulation of fluid flow by pressure oil pushing to change the direction. The principle and structure of WH valve are similar to WEH.