Pressure reducing valve?selection criteria
China pressure reducing valve manufacture-Datian Valve, the specialist of China valve manufacture, main product range: control valve, ball valve,
automatic recirculation valve, ARC valve, pump protection valve, gate valve, butterfly valve, globe valve, check valve, choke valve, safety valve, plug valve, diaphragm valve, strainer, pressure reducing valve and valve products.
Pressure reducing valve?selection criteria:
1, the soft seal of the pressure reducing valve, within the time prescribed shall not have leakage; metal seal pressure relief valve, leakage should not exceed the maximum flow rate of 0.5%;
2, the spring pressure level within a given, so that the outlet pressure between the maximum and minimum pressure reducing valve can be adjusted continuously without jamming and abnormal vibration;
3, the outlet flow changes, the outlet pressure of the direct-acting deviation is not greater than 20%, pilot less than 10%;
4, the inlet pressure changes, a direct role in the outlet pressure deviation is not greater than 10%, Pilot-not more than 5%;
5, the bellows direct acting pressure reducing valve for low voltage, medium and small diameter steam media;
6, the valve of the range of applications is very broad, can be used in the equipment and pipeline of the steam, compressed air, industrial gases, water, oil and many other liquid media, the medium flows through the pressure reducing valve at the outlet of the amount of general said mass flow or volume flow;
7, Typically, the valve pressure valve should be less than 0.5 times the inlet pressure;
8, the film direct acting pressure reducing valve in low pressure, medium and small caliber of the air, water media;
9, the pilot piston valve applies to all kinds of pressure, of various calibres, various temperature steam, air and water media, manufacturing, stainless steel acid be applied to a variety of corrosive media;
10, the pilot bellows type valve, suitable for low voltage, medium and small caliber of steam, air and other media;
11, fluctuations of the pressure relief valve inlet pressure should be controlled in 80% to 105% of the inlet pressure for a given value, such as exceeding the scope of, decompression preliminary performance will be affected;
12, the pilot film pressure reducing valve, suitable for low-voltage, medium voltage, medium and small caliber such as steam or water media;
13, usually a pressure reducing valve after the valve pressure should be less than 0.5 times the inlet pressure;
14, the spring of the valve each file is only applicable within a certain range of outlet pressure out of range to replace the spring;
15, the medium is air or water (liquid) occasions, is generally better to use the direct role of film pressure reducing valve reducing valve or pilot film;
16, in the medium temperature is relatively high occasions, generally used in the pilot piston valve or pilot bellows type valve;
17, the occasion of the medium is steam, should use the pilot piston or pilot bellows type valve;
18, in order to facilitate the operation, adjustment and maintenance, pressure reducing valve should normally be installed in horizontal pipelines.
Reproduced in: http://www.bf35.com/news/detail/23781.html