Import pressure reducing valve is a valve in the body of the opening of the opening and closing of regulating the flow of medium, the medium pressure is reduced, at the same time with the aid of the role of the valve after pressure adjust the opening of open-close part, keep the Industrial Valves after pressure within a certain range of the Industrial Valves. For example, to give priority to dozen of products of pressure reducing valve international famous brand walker WORK pressure reducing valve, the pressure reducing valve according to the working medium, mainly divided into water pressure reducing valve, gas valve, steam pressure reducing valve, oil pressure reducing valve; In the form of structure, mainly can be divided into piston type pressure reducing valve and imported diaphragm type pressure reducing valve, this paper, the first of the two kinds of pressure reducing valve is compared and the difference between selection:

1, import piston type pressure reducing Industrial Valves

piston type 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.

after the work of piston reducing valve by valve to control the pressure. Increased when pressure sensor detected indicator for pressure of the valve, pressure reducing valve valve opening decreased; When the detected after the relief valve pressure decreases, and increase pressure reducing valve valve opening, in order to meet the control requirements.

piston type pressure reducing valve - — The valve must be in a certain extent than value is higher than the system; Even in the maximum or minimum flow, it should also be able to respond to positive action and reaction control signal. These valves should be useful for control range, the maximum flow of 20% to 80%. Normal is geometric model or geometric characteristics. These types of a proportional control valve itself better flow properties and flow required by the scope.

spring piston mainly by adjusting the spring pressure reducing valve, diaphragm, piston, valve seat, disc and other parts, is the replacement of the diaphragm spring decompression. Using the direct sensing downstream pressure piston driven disc, complete decompression voltage stabilizing function of the opening of the valve disc. This product in the urban construction, high-rise buildings in cold and hot water supply system, can replace conventional partition conduit, saving equipment. Can also be in usually hot and cold water pipe network, decompression voltage stabilizing role.

piston type pressure reducing valve is mainly used for gas, steam pipeline.

2, imported diaphragm pressure reducing valve

diaphragm type pressure reducing valve is suitable for the working temperature of 0 to 90 degrees Celsius and non corrosive liquid water on the pipeline. In hot and cold water supply and fire fighting water supply system of high-rise buildings, can replace conventional partition conduit, simplify and saving system equipment, reduce the project cost.

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 valve ( Such as pressure valve valve, air valve, solenoid valve, temperature or several kinds of valve and form a complete set of applicable) 。

, for example, the WORK of walker diaphragm type pressure reducing valve is mainly composed of adjusting spring, diaphragm, piston, valve seat, disc and other parts. Using the diaphragm sensor downstream pressure directly driven disc, complete decompression voltage stabilizing function of the opening of the valve disc.

spring diaphragm pressure reducing valve in urban construction, high-rise buildings in cold and hot water supply system, can replace conventional partition conduit, saving equipment.

can also be in usually hot and cold water pipe network, decompression voltage stabilizing role.

spring diaphragm pressure reducing valve regulating, stable voltage action, suitable for water and non corrosive liquid medium pipeline.

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