Hydraulic control valve is mainly the use of the pressure inside the pipeline through the pressure difference between the upper and lower chamber control room to control the movement of the main valve plate and then through the bypass pipe and a variety of different pilot valve structure from the different functions of the valve, So as to achieve the purpose of various requirements. Hydraulic control valves are for muffler / hammer / slow open / slow closing check valve, water level control valve, pressure reducing valve, safety / relief valve, electric remote control valve for a variety of different occasions, automatically ensure that the pipe network Safe operation, widely used in construction, fire protection, waterworks, HVAC, steel, electric, petroleum, chemical and other systems Pipe network with a slow-open function to solve the traditional man-off valve Open pump with slow closing function can be artificially adjusted Closing time, automatically closing, eliminating the water hammer has a good sealing performance, can be closed after the drip leakage can be achieved Sensitive, safe and reliable, there will be no loss of control Man-operated operation in the whole process of pipe network are automatic work inside and outside the valve And all corrosion-prone parts are coated with epoxy powder Detachable valve seat clever structure, easy maintenance replacement (without the entire valve removed) in the pipeline can be any vertical or horizontal installation, the reliability of non-hydraulic control Valves Like many other valves, there are many functions that we need to know and develop, such as the development of small-bore flow control valves, the requirements of rubber for various hydraulic control valves, the life of springs, etc. for better application To the project. Hydraulic Valve should be installed horizontally. When installed horizontally, the valve cover should be upward. Fire water supply system after the valve should have drainage facilities. Automatic sprinkler system to be decompression, the valve should be set before the alarm valve ( Along the flow direction), with a single alarm valve supporting the establishment of the valve, may not equipment with the pressure relief valve; with multiple alarm valve supporting the establishment of the valve, the valve should be used plant equipment. For hot water supply project Pressure reducing valve should be used hot water pressure reducing valve. Hydraulic control valve is a water pressure control valve, which consists of a main valve and attached to the catheter ﹑ pilot valve ﹑ needle valve, ball valve and pressure gauge and other components. According to the purpose of use, function and place can be evolved into a remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve. Hydraulic control valve is divided into two types of diaphragm and piston, the same working principle, are the pressure difference between the upstream and downstream △ P as the driving force, controlled by the pilot valve, the diaphragm (piston) hydraulic differential operation, fully automatic adjustment by the hydraulic Main valve disc fully open or completely closed or in regulation. When the pressure water entering the control chamber above the diaphragm (piston) is vented to the atmosphere or downstream low pressure zone, the pressure acting on the bottom of the valve disk and under the diaphragm is greater than the pressure above, pushing the main valve disk fully open (Piston) above the control chamber pressure water can not be discharged to the atmosphere or the lower reaches of the lower pressure zone, the pressure acting on the diaphragm (piston) is greater than the pressure value below, so the main valve disc When the pressure in the control chamber above the diaphragm (piston) is between the inlet pressure and the outlet pressure, the main valve disc is adjusted and its position of adjustment is dependent on the needle valve in the conduit system and on Pilot valve joint control. Adjustable pilot valve through the downstream outlet pressure and with its changes to open or close its own small valve port, thereby changing the diaphragm (piston) above the control room pressure value, control valve plate valve position adjustment. Hydraulic control valve repair and maintenance Hydraulic control valve is a self-lubricating water valve body, without additional oil lubrication, in case of damage to the main valve components, according to the following instructions for disassembly. (Note: the general consumption of damaged products for the diaphragm and o-ring, and other internal parts of little damage) before and after the main valve front and back gate valve closed. Loosen the pipe fitting screw on the main valve cover, relieve the pressure in the valve and remove all screws, including the nuts that control the necessary brass in the pipe. Take the valve cover and spring, the shaft, diaphragm, piston, etc. removed, do not damage the diaphragm. After the above items are removed, check the diaphragm and ○ ring is damaged; if no damage do not subcontract its own internal components If you find the diaphragm or ○ ring is damaged, please screw nut on the shaft Take off the diaphragm or ring by Zhejiang, replace it with a new diaphragm or ○ ring to check if there is any damage to the valve seat, shaft and other parts of the main valve. If there are other debris inside the main valve, The clean out, according to the reverse order is to replace the main components of the valve after the combination of components, pay attention to the valve can not be jammed phenomenon.
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