The allocation principle of pneumatic valve

solenoid pneumatic valve selection should, in turn, follow the safety first, reliability, applicability and economy of the four principles, the second is based on the six aspects of the site condition ( The pipeline parameters and fluid parameters, pressure, electrical parameters, the movement way, special requirements. Selection basis:

a, according to the selection of pipe parameters of electromagnetic pneumatic valve: size specifications ( Or DN,
interface mode, in accordance with the piping or flow required to determine the size (diameter DN size.
, interface mode, general & gt; DN should choose the flange interface, DN can according to user needs or less freedom of choice.
2, according to the fluid parameter selection of solenoid pneumatic valve: group
material, temperature, corrosive fluids, appropriate chooses corrosion-resistant solenoid pneumatic valve and all stainless steel; Super clean fluid: appropriate chooses food grade stainless steel solenoid pneumatic valve.
and high temperature fluid, should choose to use high temperature resistant of electrical and electromagnetic pneumatic valve materials and seal materials, and to choose the piston structure type.
and fluid status: great to have a gaseous, liquid or mixed state, especially the diameter greater than the DN must distinguish when you order it.
, fluid viscosity, usually under cSt can be arbitrary choice, if more than this value, should choose high viscosity solenoid pneumatic valve.
3, according to the parameter selection of solenoid pneumatic valve pressure:
principle and structure of varieties, nominal pressure: the meaning of this parameter with other general pneumatic valve is the same, is set according to the pipe nominal pressure.
, working pressure: if low working pressure must choose or step by step of moving straight acting principle; The minimum working pressure difference in. Mpa above straight acting, step by step straight acting, guiding type all can choose.
4, electrical options: voltage specifications should be preferred as far as possible choose ACV, DC is relatively convenient
listed five, according to the length of continuous working time to choose: normally closed, normally open, or sustainable electricity
and when the solenoid pneumatic valve need long time to open, and close the time duration of excess type should be chosen normally open.
, if open time is short and off or there is not much time, is normally closed type chosen.
, but there are some conditions for security protection, such as a furnace, furnace flame monitoring, cannot choose normally open, choose the long-term operation.
6, according to environmental requirements choice auxiliary function: explosion-proof, check, manual, waterproof, water spray mist, diving;
, explosive environment, must choose corresponding explosion-proof grade solenoid pneumatic valve ( My company's existing: dIIBT, dIICT, ExmI/IIT.
, when tube fluid backflow phenomenon, can choose OK - my company N、OK- N series electromagnetic pneumatic valve with the function of the check.
, when need to electromagnetic field manual, pneumatic valve, can choose OK - my company S、OK- S series solenoid pneumatic valve with manual function.
, open-air installation or dust should choose more occasions waterproof, dust-proof varieties ( Protection grade over IP.
type, must be used for fountain diving solenoid pneumatic valve ( Protection grade over IP.