Hydraulic control valve is mainly use the line of its own pressure, through the pressure difference between the inferior vena control room on to control the movement of the main valve, then through the by-pass pipe and all kinds of different structure to produce various series valve pilot valve on different function, so as to achieve the purpose of the various requirements. Hydraulic control valve respectively silencing/hammer/slow elimination/slow close check valve, water level control valve, pressure reducing valve, safety/relief valves, electric control valve used in a variety of different occasions, such as automatic guarantee the safe operation of pipeline, widely used in building, fire, water, hvac, steel, power, petroleum, chemical industry and so on system pipe network has delayed opening function, can solve the traditional people shut valve open pump have slowly-closing function, can be artificially adjust the closing time, automatically slowly-closing, eliminate water hammer has good sealing performance, closed can achieve nimble, safe and reliable, without artificial operation will not be out of control phenomenon, in the whole process of pipe net work for automatic valve inside and outside all and easy corrosion of using epoxy resin powder coating removable seat structure, convenient maintenance replacement ( Without the whole valve removed) In the pipe can be arbitrary vertical or horizontal installation, its reliability is not like other valves, hydraulic control valve has many we need to know, to develop the function, such as small diameter of the development of flow control valves, hydraulic control valve valve with the requirement of the rubber, the life of the spring, etc. , in order to better applied to engineering. Hydraulic control valve should be installed horizontally. When mounted horizontally, the cover should be upward. After the fire water system of the pressure reducing valve valve should have drainage facilities. Automatic sprinkler system should be reduced pressure, the pressure reducing Industrial Valves should be set up before the alarm valve ( Along the flow direction) , with a single alarm valve set pressure reducing valve, not equipment with a pressure reducing valve; With multiple alarm valve set pressure reducing valve, factory should use pressure reducing valve. Used for hot water supply project of the pressure reducing valve, hot water operated pressure reducing valve should be adopted. Hydraulic control valve is a hydraulic control valves, it consists of a main valve and attached catheter, pilot valve, needle Industrial Valves, ball valve and pressure gauge, etc. Depending on the purpose, function and place can be turned into a remote-controlled floating ball valve, relief valve, slow close check valve, flow control valve, relief valve, hydraulic electric control valves, etc. Hydraulic control valve diaphragm type and piston type two kinds, the working principle of the same, is more than the downstream pressure difference delta P, is controlled by a pilot valve, the diaphragm ( The piston) Hydraulic differential operation, entirely by hydraulic automatic adjustment, so that the main valve valve fully open or fully closed or in a state of adjustment. When entering the diaphragm ( The piston) Of control room above the pressure downstream of the water is discharged into atmosphere, or low pressure area, effect in the bottom of the valve plate above and below the diaphragm of the pressure value is greater than the pressure value, so the main valve plate to the fully open position; When entering the diaphragm ( The piston) Pressure of control room above the water can't row to the atmosphere or downstream low pressure area, the diaphragm ( The piston) At the top of the pressure value is greater than at the bottom of the pressure value, so will the pressure of the main valve disc to the fully closed position; When the diaphragm ( The piston) Of control room above the pressure in the inlet pressure and outlet pressure, the main valve disc is in a state of adjustment, adjust the position depends on its type needle valve in the duct system and adjustable pilot valve joint control function. Adjustable valve can through the downstream outlet pressure and along with the change of it up or down its own small valve port, thus changing the diaphragm ( The piston) Of control room above the pressure value, the control of the valve disc to adjust position hydraulic control valve repair and maintenance of the hydraulic control valve is a kind of water is used since embellish type body, do not need to add oil lubrication, in case of damage of main parts in the valve, please follow the instructions below to remove. ( Note: in general consumption in the valve damage product for diaphragm and ring, other internal components damage little) The main valve before and after the first side gate valve closed. The piping on the main valve cover joint screw loosening, pressure release valve, will take off, all the screws as the necessary control lines of brass nut. Take cover and spring, and to get off axis core, diaphragm, piston, do not damage the diaphragm. Remove the above things, diaphragm and examine whether the protection ring damage; If no damage do not points again found itself for its internal parts such as diaphragm or ring was damaged, please loose the nut on the axis core, get to decompose the diaphragm or circle, then remove to replace a new type of diaphragm or bound to examine in detail the main valve inside the seat, axis core and so on whether have damage, if there are other debris to be cleared within the main valve, is in reverse order will replace the parts after combination installed the main valve, no jam phenomenon should be the valve.
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