Hydraulic control valve is a water pressure controlled valve, which consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge. According to different purposes, functions and places of use, it can be developed into remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve, etc.

The hydraulic control valve is divided into diaphragm type and piston type. The working principle is the same. Both of them are powered by the pressure difference p between the upper and lower reaches, and controlled by the pilot valve, so that the diaphragm (piston) hydraulic differential operation can be completely automatically adjusted by hydraulic power, so that the main valve disc can be fully opened or closed or in the adjustment state. When the pressure water entering 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 disc and below the diaphragm is greater than the pressure above, so push the main valve disc to the fully open position; When the pressure water in the control room above the diaphragm (piston) cannot be discharged to the atmosphere or the downstream low-pressure area, the pressure acting on the diaphragm (piston) is greater than the pressure below, so the main valve disc will be pressed to the fully closed position; When the pressure value in the control room above the diaphragm (piston) is between the inlet pressure and the outlet pressure, the main valve disc is in the regulating state, and its regulating position depends on the joint control effect of the needle valve and the adjustable pilot valve in the conduit system. The adjustable pilot valve can open or close its own small valve port through the downstream outlet pressure and with its change, so as to change the pressure value in the control room above the diaphragm (piston) and control the adjustment position of the square valve disc.

Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.

Major products: Butterfly Valve, Ball Valve,Gate Valve, Check Valve, Globe Vavlve,Y-Strainers, Electric Acurator , Pneumatic Acurators .

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