Shuangda Hydraulic Machinery is one of the professional pilot control check valve manufacturers and suppliers in China,Website:://.chinahydraulic-valve.com, welcome to buy cheap and low price pilot control check valve made in China from our factory.Usage and characteristicWhen the flow in the pilot controlled check valve is in the forward direction, if the pressure of the inlet is bigger than the opening pressure, the oil can flow through the check valve, otherwise the oil will be blocked, but when the pilot pressure of controlled oil is opened, the oil can flow freely.With the optimized flow way of the valve,cam operated directional valves have the features of high pressure, big flow, small pressure loss, energy saving, strong anti-pollution ability and light weight.