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Gao Yi hydraulic control valve concepts and types
The concept and type of high art hydraulic control valve a, the type of hydraulic control valve: According to the purpose of use, function and place can be evolved into a remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve ﹑ Hydraulic electric control valve, pump control valve. According to the structure can be divided into two types of diaphragm and piston. b, the concept of hydraulic control valve: hydraulic control valve is a water pressure control valve, which consists of a main valve and attached to the catheter ﹑ pilot valve ﹑ ﹑ ball valve and pressure gauge and other components. c, hydraulic control valve diaphragm and piston type two types of valves work on the same principle, are based on the upstream and downstream pressure difference △ P as the power, controlled by the pilot valve, so that the diaphragm (piston) hydraulic differential operation, completely by the hydraulic automatic Adjust so that the main valve disc is fully open or fully closed or in regulation. When the pressure water entering the control chamber above the diaphragm (piston) is vented to the atmosphere or downstream low pressure zone, the pressure acting on the bottom of the valve disk and under the diaphragm is greater than the pressure above, pushing the main valve disk fully open (Piston) above the control chamber pressure water can not be discharged to the atmosphere or the lower reaches of the lower pressure zone, the role of pressure on the diaphragm (piston) is greater than the pressure value below, it will be the main valve disc Pressure to the fully closed position; when the pressure value in the control chamber above the diaphragm (piston) is between the inlet pressure and the outlet pressure, the main valve disc is adjusted and its position of adjustment depends on the needle valve and the adjustable Pilot valve joint control. Adjustable pilot valve through the downstream outlet pressure and with its changes to open or close its own small valve port, thereby changing the diaphragm (piston) above the control room pressure value, control valve plate valve position adjustment.