pressure reducing valve is by regulating, reduced the inlet pressure to a needed discharge pressure, and to rely on the energy of the medium itself, make the outlet pressure automatically to keep the stability of the valve. From fluid mechanics point of view, pressure reducing valve is a throttling element, local resistance to change that by changing the throttling area, change the kinetic energy of the flow velocity and fluid, different pressure loss, so as to achieve the goal of decompression. And then rely on the adjustment of the control and regulation system, make the valve after pressure fluctuations and spring force equilibrium, the valve after pressure constant within a certain error range.

pressure reducing valve working principle of

pressure and stability to a fixed value, so that the regulator can obtain stable gas source power for regulating control. According to the structural form can be divided into the diaphragm, diaphragm spring, piston, lever and bellows type; According to the seat number can be artificial single-seat and two-seater; According to the position of the disc can be divided into different function type and reaction type.

pressure reducing valve type partition

1, the piston type pressure reducing valve

this type of pressure reducing valve set two kinds of valve, pilot valve and main valve - all in one. The design of the pilot valve is similar to direct acting type pressure reducing valve. Exhaust pressure from the pilot valve on the piston, the piston to open the main valve. If the main valve is bigger, cannot open directly, this design can use open the main valve inlet pressure. Therefore, this type of pressure reducing valve, compared with the direct acting type pressure reducing valve, under the same pipe size, capacity and accuracy ( + / - 5%) Higher. Same as the direct acting type pressure reducing valve, pressure reducing valve internal stress perception, without external sensing line installation.

2, acting type pressure reducing valve

simple pressure reducing valve, direct acting pressure reducing Industrial Valves, with flat diaphragm or bellows. Because it is independent structure, there is no need to install external sensing line in the downstream. It is small size in three types of pressure reducing valve, to use a kind of economic, designed for low flow rate. Direct acting downstream of the accuracy of the pressure reducing valve is usually set point of + / - 10%.

3, diaphragm pressure reducing valve

in this type of pressure reducing valve, double diaphragm instead of the piston in the afferent type pressure reducing valve. The increase of the diaphragm area of the main valve to open a bigger, and under the same pipe size, its capacity is larger than within the guide piston pressure reducing valve. In addition, the diaphragm is more sensitive to stress change, the accuracy of + / - 1%. Positioning accuracy is higher due to the downstream of the sensing line ( outside) The location less gas or liquid turbulence. The pressure reducing valve is very flexible, can use different types of pilot Industrial Valves ( Such as pressure valve valve, air valve, solenoid valve, temperature or several kinds of valve and form a complete set of applicable)

base station pressure reducing valve in xiangtan big stress ratio, high stability, long service life and reducing valve using principle has been widely applied in the technical water supply system, are the three gorges hydropower station, violet zipingpu hydropower station, goupitan power station such as the customer the consistent high praise, 0731 - the phone 58289061.

ZJY46H piston type pressure reducing valve is designed for high head pressure water supply system design of customized products, underground water for mining area, long distance pipeline/light oil; Capacity of the hydropower station is a key, load rejection condition, water level change is big, sediment concentration, flow medium impact turbine entry head high provides a good solution.

ZJY46H combined type pressure reducing valve features:

1, as spare double feedback 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 Industrial Valves and control valve adopts the whole structure of piston.

5 per unit, the main valve body are not less than 1 hour. Crush test 5 times.

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

7, stress ratio up to now, level of stress has reached 370 meters high water head.

8 5000 m3 / h, and flow rate can be stand-alone application ( The three gorges xiangjiaba power station) Has reached 800 mw.

product scope of supply: diameter: (- DN500; Pressure rating: 1. 6MPa- 6. 4MPa

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