hydraulic control valve is hydraulic control valves, catheter, connected by a main valve and pilot valve, needle valve, ball valve and pressure gauge. According to the purpose, function and position, it can be turned into a remote control float valve, relief valve, slow close check valve, flow control valve, relief valve, hydraulic electric control valve, water pump control valve, etc. According to the structure, hydraulic control valves can be divided into two types: diaphragm and piston. Work on the same principle. The downstream pressure difference Δ P power is controlled by the pilot valve, the diaphragm ( The piston) Hydraulic differential operation completely. Automatic adjustment, the main valve fully open or fully closed or in a state of adjustment. When entering the diaphragm ( The piston) Of control room above the pressure downstream of the water in the atmosphere, or low pressure area, effect in the bottom of the valve plate and below the diaphragm of the pressure is greater than the pressure value, thus promote the main valve fully open when control interior diaphragm ( The piston) At the top of the water pressure cannot be released into the atmosphere, or low pressure zone downstream, the diaphragm ( The piston) At the top of the pressure is greater than the pressure, so the main valve disc will be pressure to the fully closed position; When the diaphragm ( The piston) Above the control room of the pressure between the inlet pressure and outlet pressure, the main valve is in a state of adjustment, adjust the position depends on the catheter needle valve in the system and joint control pilot valve can be adjusted. Adjustable pilot valve can through the downstream outlet pressure on or off its own small valve port, and change, thus changing the control room in the diaphragm ( The piston) At the top of the pressure value, and the adjustment of the valve disk position control.

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While the productivity and efficiency benefits of automation are unequivocal for manufacturing ductile iron gate valve, the need for skilled humans to operate, utilize and advance technologies is equally unmistakable.