When steam pressure pneumatic valve selection considerations

Steam pressure pneumatic valve is one of the commonly used pneumatic valves on steam pipeline, such as pneumatic valve piston steam pressure, steam pipeline when choosing reduced pressure pneumatic valve, often caused by a lack of experience, or other factors, to choose suitable steam pressure pneumatic valve, causing pneumatic valves use shorter time limit, can't play well the role of reduced pressure pneumatic valve in the steam pipe. This article briefly introduce, steam pressure pneumatic valve selection considerations.


1, the right relief pneumatic valve


the right choice of vacuum pneumatic valve model is the key to ensure the long-term stable work reduced pressure pneumatic valve. Choose reduced pressure pneumatic valve should be based on the reduced pressure of the pneumatic valve pressure, consumption required for steam flow, before and after applying the theory and the environment to determine the appropriate reduced pressure pneumatic valve, pneumatic valve decompression is usually 1-2 diameter smaller than steam pipe. About the status of the system load change is big, should use two causes more reduced pressure pneumatic valve in parallel, in order to prevent large pneumatic valve work for a long time in the small load condition. Otherwise constitute a reduced pressure pneumatic valve wear and tear, the phenomenon such as shorten service life.
the reduced pressure pneumatic valve most of the problems from the steam system of moisture and impurities, in order to ensure the efficiency of vacuum pneumatic valve, provides the high quality of the steam is very important to vacuum pneumatic valve, our violent initiative in front of the reduced pressure pneumatic valve device 100 purpose filter and hydrophobic installed, filters should be installed side.
because ordinary vacuum pneumatic valve with fine quality of material and technology, there is a certain gap, so domestic ordinary pressure pneumatic valve relief in after a period of time will appear unstable, and when the downstream without steam, can't timely and accurate closing pressure pneumatic valve, a steam, according to the serious waste of steam, and produce safe hidden trouble, the life of the usual domestic ordinary piston vacuum pneumatic valve in about three months, and the use of a high quality vacuum pneumatic valve life in 10 to 15 years or so, In addition to a few corresponding parts) And high quality straight-pilot reduced pressure pneumatic valve can provide a stable pressure ( Both static and dynamic can accurate work) Frugal steam, pressure stability will also be able to ( Frugal around 35%) can be , which is made less than the ordinary vacuum pneumatic valve, so the initiative to your company to choose high quality vacuum pneumatic valve.
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2 before and after the decompression pneumatic valve end shall be equipped with double bellows seal globe pneumatic valve, pneumatic valve decompression before must have precise steam special filter, vacuum pneumatic valve end shall be before and after steam pressure gauge, the branch shall have a vent valve, beside the ventilation valve for adjustable flow of double pneumatic valve, corrugated pipe cut-off diameter with reduced pressure pneumatic valve. Can be set up according to the different steam quality steam separator.
3, pay attention to matters
the reduced pressure pneumatic valve selection is too big, not easy for small open through a vacuum pneumatic valve damage.
the reduced pressure pneumatic valve diameter than the steam pipeline more than a smaller size. Should be professionally software or chart to confirm. Upstream and downstream steam pipe size should be according to the steam flow rate, pressure by professional software or formula.
pressure adjusting ratio is more than 10:1, wants to use two vacuum pneumatic valve series. Minimum flow is less than 10% of the maximum flow, the initiative to use two relief pneumatic valve in parallel.


about parallel relief station, two pressure pneumatic valve allocation criterion initiative by one-third and two-thirds of the total flow of distribution. About parallel relief station, two relief when setting outlet pressure pneumatic valve can be 0. 1 kg, small flow of set pressure to bigger.


the above the matters needing attention when steam pressure pneumatic valve selection, hope for your decompression in the steam pipe pneumatic valve selection has certain help!