Hydraulic control valve types and working principle

1. The concept of hydraulic control valve: The hydraulic control valve is the valve controlled by water pressure. It consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge.

2, the type of hydraulic control valve: According to the purpose of use, function and location can be developed into a remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve, water pump control valve Wait. According to the structure can be divided into two types of diaphragm and piston type.

3, the hydraulic control valve diaphragm type and piston type two kinds of valves work the same principle, are all above the downstream pressure difference â–³P is power, by the pilot valve control, makes the diaphragm (piston) hydraulic differential operation, completely by the hydraulic automatic Adjust so that the main valve disk 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 entering the diaphragm (piston) above the control room pressure water can not be discharged to the atmosphere or the downstream low pressure area, the role of pressure above the diaphragm (piston) is greater than the pressure value below, so the main valve disc will be Press 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 in the adjustment state, and the adjustment position depends on the needle valve in the catheter system and the adjustable The combined control of the pilot valve. 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.