hydraulic pressure reducing valve is a kind of automatic valve special device, reduce the working pressure pipeline, it will be before the valve pipe of high water pressure reducing valve pipe after the required levels. Pressure reducing valve technology is widely used in hydropower station water supply, high-rise building, the area of urban water supply pipe network pressure is too high, mines and other occasions, to ensure the water supply system in the water points to obtain the appropriate service water pressure and flow rate. Base in the age of 20 years in r&d and manufacture of hydraulic pressure reducing valve products focus on hydropower station, providing a complete set of technical water supply system for hydropower station solution.

a lot of structure type pressure reducing valve, common in the past have a spring in the diaphragm, piston, etc. Within the basic principle of the pressure reducing valve by valve port on the local resistance to reduce the water pressure, water pressure drop by connecting disc film or the scope of import and export pressure difference on both sides of the piston automatic adjustment. The basic properties of the hydraulic pressure reducing valve

1, the pressure regulating range: it refers to that the adjustable limit of the pressure reducing valve output pressure P2, within the scope of the requirements of pressure reducing valve to the specified precision. Regulating scope mainly related to pressure regulating spring stiffness.

2, pressure feature: it refers to the flow of fixed value for g, caused by the input pressure fluctuation characteristics of the output pressure fluctuations. The smaller the output pressure fluctuation, the characteristics of the pressure reducing valve, the better. The output pressure must be less than the input pressure - Constant value was basically not changes over the input pressure.

3, flow characteristic: it refers to the input pressure - Timing, the output pressure changes along with the change of output flow g resistance. G when the flow changes, the output pressure changes as small as possible. Generally the lower the output pressure, which fluctuates according to the change of output flow.

hydropower station operation condition is more complex, especially the stand or fall of water quality is directly related to the safe running of the equipment. For sediment content of large hydropower station, in addition to the flow of the reducing valve position of stainless steel material and welding of nickel base alloy abrasion proof, pressure reducing valve recoil drainage device can effectively prevent the congestion feedback control system, keep the pressure reducing valve in the sediment of other water quality more good condition. ( Recoil sewer system standard for manual control, according to the actual circumstance of the water quality to grasp the recoil blowdown frequency, or PLC automatic recoil drainage device directly. )

the working principle of hydraulic pressure reducing valve

when the inlet pressure and flow rate changes, through the control valve pressure in the adjustment of the main valve pressure regulation, to control the opening of the throttle cones, changing the flow area of the medium, so as to achieve the goal of reduced pressure regulator. Base hydraulic pressure reducing valve in the age of

1, the characteristics of the double feedback as spare system can not stop;

2, recoil sewerage system can be used more poor water quality.

3, outlet pressure locking system can lock valve outlet pressure limit, no longer afraid of high pressure water damage.

4, the main valve and control Industrial Valves adopts the whole structure of piston.

each of 5, the main body are not less than 1 hour. Crush test 5 times.

6, greatly extended service life, a security purchase ten years.

7, relief than up to now, the biggest primary decompression supreme head has amounted to 370 meters.

8, maximum flow can be 5000 m3 / h, the largest single ( The three gorges xiangjiaba power station) Has reached 800 mw.

hydraulic simulation test bed artesian pressure water supply valve installation

1, the hydraulic pressure reducing valve can be installed in horizontal or vertical flat line;

2, the installation of the hydraulic pressure reducing valve must be in strict accordance with the direction of the arrow on the valve body to maintain and fluid flow in the same direction, if the water is not clean some impurities, filter must be installed upstream water inlet of the reducing valve;

3, open the hydraulic pressure reducing Industrial Valves adjusting export pressure, adjusted with a word screwdriver, clockwise rotation screwdriver outlet pressure, and outlet pressure decreases, and cooperate with pressure gauge to adjust, until met the requirement of the outlet pressure value;

4, hydraulic pressure reducing valve in the pipeline have certain effect check, in order to prevent the harm of water hammer, also can install small expansion tank, to prevent damage to the tube and Industrial Valves, filter must be installed in front of the inlet pipe of the pressure reducing valve, and after the expansion tank must be installed in the hydraulic pressure reducing valve outlet pipe;

5, if need to install in the hot water system, hydraulic pressure reducing valve must be installed between the pressure reducing valve and expansion tank check valve. Both to expansion tank to absorb the increase due to thermal expansion of the volume of water, and can prevent the reverse flow of hot water or pressure fluctuations on the influence of the pressure reducing valve, to ensure that the pressure reducing valve normal work for a long time.

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