Water control valve concept and working principle
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Types of water control valves: According to the purpose of use, function and location can be developed into a remote control float valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic control valve, water pump control valve. According to the structure can be divided into diaphragm and piston type two kinds of pressure reducing valve.
Diaphragm type and piston type valves of water conservancy control valves have the same working principle. All these are downstream differential pressures â–³P for power. They are controlled by a pilot valve to make the diaphragm (piston) hydraulically operated differentially and are fully automatically adjusted by water conservancy. So that the main valve disc is fully open or fully closed or in regulation. When the pressure water in the control room above the diaphragm (piston) is discharged to the atmosphere or the downstream low pressure area, the pressure acting on the bottom of the valve plate and below the diaphragm is greater than the pressure value above, so push the main valve disk to fully open The position; when the pressure water rotor pump in the control room above the diaphragm (piston) cannot be discharged to the atmosphere or the downstream low pressure zone, the pressure acting on the diaphragm (piston) is greater than the pressure value below, so the main valve will be The valve disk is pressed 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 disk is in an adjustment state, and its adjustment position depends on the needle valve in the catheter system and Adjustable pilot valve joint control. The adjustable pilot valve can open or close its own small valve port through downstream outlet pressure and change the pressure value of the control chamber above the diaphragm (piston) to control the adjustment position of the square valve disc.