feature
The groove type hydraulic control valve is a valve controlled by water pressure, which consists of a main valve and its attached pipes, guide valves, needle valves, ball valves, and pressure gauges. According to different usage purposes, functions, and locations, it can be evolved into remote control float valves, pressure reducing valves, slow closing check valves, flow control valves, pressure relief valves, hydraulic electric control valves, etc. The working principle is the same, both are powered by a pressure difference of 4P between upstream and downstream, controlled by a pilot valve, to enable diaphragm hydraulic differential operation, fully regulated by hydraulic automatic control, so that the main valve disc can be fully opened or fully closed or in a regulating state. When the pressure water entering the control room above the diaphragm is discharged to the atmosphere or downstream low-pressure area, the pressure value acting on the bottom of the valve disc and below the diaphragm is greater than the pressure value above, so push the main valve disc to the fully open position; When the pressure water entering the control chamber above the diaphragm cannot be discharged to the atmosphere or downstream low-pressure area, the pressure value acting above the diaphragm is greater than the pressure value below, so the main valve disc will be pressed to the fully closed position; When the pressure value in the control chamber above the diaphragm is between the inlet pressure and the outlet pressure, the main valve disc is in a 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. Adjustable pilot valves can open or close their own small valve ports according to the downstream outlet pressure, thereby changing the pressure value controlled above the diaphragm and controlling the adjustment position of the main valve disc.