The hydraulic control valve mainly uses its own pressure in the pipeline to control the movement of the main valve disc through the pressure difference of the upper and lower chamber control chamber, and then produces various series of valves through the bypass pipe and various different structure guide valves, thus achieving the purpose of various requirements.

Hydraulic control valves are used for noise reduction / elimination / slow opening / slow closing valve, water level control valve, pressure relief valve, safety / pressure relief valve, electric remote control valve and so on for various kinds of occasions, which automatically guarantee the safe operation of the pipe network, widely used in building, fire, water works, HVAC, steel, electric, petroleum, chemical and other systems. The valve opening pump has a slow closing function, which can adjust the closing time, automatically realize the slow closing, eliminate the water hammer with good sealing performance. After closing, the action is sensitive, safe and reliable. It will not be out of control without human operation. In the whole process of the pipe network operation, it is both inside and outside the automatic working valve and all easy to corrode. The parts all use the epoxy resin powder coating the detachable seat structure ingenious, the maintenance and replacement is convenient (without the whole valve dismantling) in the pipeline can be arbitrary vertical or horizontal installation, its reliability non hydraulic control valve, like other valves, still have many needs we know, to open the function, such as the development of small caliber flow control valve. Various hydraulic control valves are required for rubber, spring life and so on in order to be better applied to engineering. Hydraulic control valves should be installed horizontally. The valve cover should be upwards when horizontal installation is installed. There should be drainage facilities after the pressure relief valve valve of the fire water system. The pressure relief valve should be set in front of the alarm valve (along the water, along the water). Flow direction), the pressure relief valve set with a single alarm valve can not be used with the pressure relief valve; the pressure relief valve set up with the multiple alarm valves should be used in the equipment factory. The hot water pressure relief valve should be used for the pressure relief valve used in the hot water supply project.

The hydraulic control valve is a hydraulic pressure control valve. It consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge. According to the different use purpose, function and place can be changed into remote control floating ball valve, pressure relief valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve and so on.

The hydraulic control valve is divided into two types of diaphragm type and piston type. The working principle is the same, all of which are the downstream pressure difference Delta P as the power. The hydraulic differential operation of the diaphragm (piston) is controlled by the guide valve, and the hydraulic differential operation of the diaphragm (piston) is completely controlled by hydraulic automatically, so that the main valve disc is completely open or completely closed or in the state of adjustment. When the pressure water in the control room above the diaphragm (piston) is discharged into the atmosphere or downstream low pressure area, the pressure value under the valve plate bottom and below the diaphragm is greater than the above pressure value, so the main valve disc is pushed to the fully open position; when the diaphragm (piston) is entered, the pressure water in the control room can not be discharged to the atmosphere or below. When you swim in the low pressure area, the pressure value above the diaphragm (piston) is greater than the pressure value below, so the main valve disc will be pressed to the completely closed position. When the pressure value in the control room above the diaphragm (piston) is in the middle of the inlet pressure and the outlet pressure, the main valve disc is in the state of adjustment, and its adjustment position depends on the position of the valve. The combined control function of needle valve and adjustable pilot valve in the pipe system. The adjustable guide valve can open large or close its own small valve port through the pressure of the downstream outlet and change with it, so as to change the pressure value of the control room above the diaphragm (piston) and control the regulating position of the valve disc.

Maintenance and maintenance of hydraulic control valve

The hydraulic control valve is a self lubricating valve body which does not need additional oil lubrication. If the main valve parts are damaged, please disassemble them according to the following instructions.

(Note: the internal valves generally consume damaged products as diaphragms and type rings, and few other internal parts are damaged).

First, the front and rear end valve of the main valve is closed.

Release the screw on the main valve cover, release the pressure inside the valve, remove all the screws, including the nut of the necessary copper pipe in the control pipe.

ake the valve cover and spring, remove the shaft core, diaphragm, piston and so on, do not damage the diaphragm.

If the above items are removed, check whether the diaphragm and the ring are damaged. If there is no damage, do not divide the objects into their internal parts.

If it is found that the diaphragm or ring is damaged, loose the nut on the shaft core and remove the diaphragm or ring from it, then replace it with a new diaphragm or ring.

Check the main valve internal valve seat, shaft core and other damage, if there are other debris in the main valve inside the cleaning out, the reverse is the reverse is the replacement of the

components of the main valve, pay attention to the valve can not have a blocking phenomenon.