Note selection of solenoid valves

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Selection of solenoid valve should first turn to follow the four principles of safety, reliability, applicability, economy, followed by the six areas

Site conditions (ie, the pipeline parameters, fluid parameters, pressure paramet ers, electrical parameters, action, special requirements to choose). Selected in accordance with

According to:

       Pipeline parameters to select electromagnetic valve: Path specification (ie, DN), the interface mode

      1, in accordance with the site pipe diameter size or flow requirements to determine the size of the diameter (DN).

      2, interfaces, general> DN50 To select the flange interface, ≤ DN50 can be free to choose according to user needs.

      Second, according to the fluid parameters to select electromagnetic valve: material, temperature group

      A corrosive fluid: better to use corrosion-resistant jiaerling pneumatic  and stainless steel; eating superclean Fluid: should use food grade s tainless steel

Solenoid valve.

      2, high-temperature fluids: To select a high-temperature electrical materials and sealing materials, electromagnetic valve, but also to select the piston Results

Structure type.

      3, fluid status: gaseous, liquid or mixed state, in particular, is a diameter greater than DN25 order must separate.

      4, the fluid viscosity: usually 50cSt the following arbitrary choice than this value will have to use the pneumatic auto drain of the high viscosity.

      Select solenoid valve: principles and structure of species based on the pressure parameters

      1, Pressure: This parameter is the same as the meaning of other general purpose valves, is based on the pipe nominal pressure to decide.

      Working pressure: if the low pressure must be selected direct action or step-by-step principle of direct action; minimum working pressure in 0.04Mpa

Above direct-acting type, step-by-step direct-acting, Pilot operated can be selected.

      Electrical options: voltage specification should be preferred AC220V, DC24 is more convenient.

      Five, according to the length of continuous working time options: normally closed, normally open, or sustainable power

       1, normally open when the solenoid valve open for a long time, and duration of the excess time off should be used.

       2, I opened a short time or on and off time is running out, then select normally closed type.

       3, but some conditions for security, s uch as furnace, furnace flame monitoring, you can not select normally open, you should choose a long-term power

Type.

       , According to environmental requirements, the choice of auxiliary functions: explosion-proof, non-return, manual, water fog, water washout, diving, explosive environment

: You must choose the appropriate explosion-proof level of the solenoid valve (my company existing: d II BT4, d II CT5, Ex m I / II T4).

       2, when the fluid inside back, you can choose my company OK71-N, OK72-N series with non-return function solenoid valve.

       3, when the scene manual operation of the solenoid valve, you can choose OK71-S, OK72-S series with manual functional electrical

Magnetic valve.

       4, open-air installation or dust more occasions should be used to waterpr oof, dust-proof varieties (protection class IP54 or more).

       5, for the fountain must be submersible type solenoid valve (protection class IP68 and above).