Extend the life of the regulating pneumatic valve eight ways

the big opening work
life extension method to adjust the pneumatic valve as far as possible from the start work on the biggest opening, e. g. , %. So, cavitation and erosion damage occurred on the pneumatic valve core in the head. With pneumatic valve core damage, the traffic increases, the corresponding pneumatic valve closed again a bit, so constantly, gradually close, make whole all make full use of the pneumatic valve core, until the pneumatic valve core roots and sealing surface damage, cannot use. Work at the same time, the big opening the throttle gap is big, erosion is abate, this is more than the start pneumatic valve opening in the middle and small open degree on the work to improve life ~. Such as a chemical plant using this method, the service life of pneumatic valve improves The Times.
） Job opening improve life increase with the decrease of S method to reduce
S, increase system besides regulating pneumatic valve damage, reduce the pressure drop distribution to the pneumatic valve, in order to ensure the flow rate by adjusting the pneumatic valve, will inevitably increase adjust the opening of pneumatic valve, at the same time, the pneumatic valve on the pressure drop decreases, and gets the corrosion, erosion is also reduced. After the concrete measures are: pneumatic valve orifice throttling pressure drop consumption; Close the series manual pneumatic valve on the pipeline, to adjust the opening of pneumatic valve to obtain the ideal job. For a begin to choose big in a small open of the pneumatic valve work, using this method is simple, convenient and effective.
） Narrow caliber increase the job opening life
through the pneumatic valve diameter decrease to increase the job opening, the concrete measures are: (1) in one of a small diameter pneumatic valve, such as DN with DN. Pneumatic valve body (2) does not change, change small pneumatic seat diameter pneumatic valve core seat. If a chemical plant overhaul would raise a DGL replacement for dg, improves The Times life.
） Transfer damage location to improve life
the destroyed places transferred to a secondary position, in order to protect the pneumatic valve core seat sealing surface and the surface of the throttle.
） Growth throttling channel to improve life
growth throttling channel is the most simple and thicken pneumatic valve seat, pneumatic valve seat hole growth, forming a longer throttling channel. On the one hand can make the flow closed type throttling after the sudden expansion of delay, its damage position, make them away from the role of sealing face; Added, on the other hand, thermal resistance, reducing the pressure recovery degree, the cavitation. Some pneumatic valve seat hole design into terraced, wave, is to increase the resistance, weaken the cavitation. This kind of method on high pressure pneumatic valve of the device and the old often use pneumatic valve is improved, is also very effective.
） Change to improve life method
flow towards open type flow, cavitation, erosion, the main role in seal surface, make the pneumatic valve core roots and pneumatic valve core pneumatic valve seat sealing surface damage to quickly; Flow towards closed closed type flow, cavitation, erosion effect after throttling, pneumatic valve seat sealing surface, under the protection of the sealing surface and pneumatic valve core roots and prolong the life span. Look away using pneumatic valve, when life extension problems more outstanding, only need to change flow direction can prolong life ~.
） Method of use special materials to improve life
as cavitation resistance ( Destruction shape such as honeycomb dot) And wash ( Streamlined small groove) Use of cavitation and erosion resistance, special material to make the throttling parts. This kind of special material with YC -, A steel, department too, hard alloy, etc. For corrosion resistance, can convert more resistant to corrosion, and has certain mechanical properties, physical properties of materials. This material is divided into non-metallic materials ( Such as rubber, ptfe, ceramic, etc. ) And metal materials ( Such as monel, hartz alloy, etc. ) Two categories.
） Change method of pneumatic valve structure to improve life
to change the structure of pneumatic valve or selection of pneumatic valve with longer life is way to achieve the purpose of life, such as selection of multistage type pneumatic valve, pneumatic valve, the anti cavitation corrosion pneumatic valve, etc.