A kind of pressure reducing valve in instrumentation refers to a kind of equipment used to control the pressure value. Pressure reducing valve is usually used in the category related to water, because from the perspective of the transmission medium, the transmission medium of the equipment is mainly water, but we all know that water will flow, that is, water may be lost in use, for this pressure reducing valve also has a very important function is the outstanding water-saving function, together with the ability to improve the operation of the water supply system, optimize it, from the application of the equipment, can be used in mines, or buildings, especially and high-rise buildings, Our domestic water is supplied through the city's water supply pipes, and the equipment also has an important application in some areas of the water supply pipes.
When consumers buy pressure reducing valves, they need to choose products according to their needs. Generally, pressure reducing valves are used in different fields, and the types and types selected are also different. From the perspective of structure, this kind of equipment can be divided into bellows pressure reducing valve, membrane pressure reducing valve, piston pressure reducing valve, etc., different types of different functions also determine the different scale of its application. However, when selecting the equipment, no matter which one is used, there are selection methods and specifications.
First of all, at the time of selection, it depends on whether there is any abnormality in the equipment, such as jamming, for the pressure reducing equipment that is not standardized, even if the value of the outlet pressure is adjusted in the scale of the spring pressure level, it will also show abnormal vibration, or as mentioned above, it will show the phenomenon of jamming. The problem of pressure reducing equipment, especially the pressure reducing equipment specially for water medium, is that the leakage is that the sealing of the equipment is not good, but it does not mean that any pressure reducing equipment must not leak at all, and the sealing of pressure reducing equipment generally has two raw materials, one is soft seal, and the other is metal seal. Regarding the metal sealed equipment, there can be a loss of medium within the regular time, but the scale of the loss is also a quantitative rule, generally * more than 0.5% of the large flow rate, otherwise it is regarded as a problem with the equipment, but the requirements for soft sealing are very strict, and it is completely not allowed to be lost. From the problem of large pressure of equipment, the pressure behind the valve and the pressure before the valve of the regular equipment are different, and the pressure after the valve will be relatively small, about 0.5 times.
The selection requirements for general pressure reducing equipment are probably like this, and different pressure reducing equipment is selected for different application environments. For example, the bellows type pressure reducing equipment mentioned above, its applicable medium is generally not fluid, but steam, and there are restrictions on pressure and caliber, bellows type pressure reducing equipment is to act on the low-pressure small-diameter medium to play a good role, or the piston type pressure reducing equipment can also play an outstanding role.
Pressure reducing valve is widely used in production, the medium used is water and steam, but also other liquids, in the selection of pressure reducing equipment only to understand its characteristics, understand what the working environment is suitable for better selection, together with some common sense to ensure the selection of high-quality products.
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