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What should be paid attention to when selecting the imported solenoid valve

Solenoid valve selection method:
First, select the solenoid valve according to the media parameters:
1. High-temperature medium: Solenoid valves made of high-temperature resistant electrical materials and sealing materials should be used, and piston type types should be selected.
2. Medium state: Most of them have a gaseous state, a liquid state or a mixed state, especially when the caliber is larger than DN25, the order must be distinguished.
3, corrosive medium: corrosion-resistant solenoid valve and all stainless steel should be used.
4, edible ultra-clean medium: food grade stainless steel solenoid valve should be used.
Second, the pipeline parameter selection solenoid valve:
1. Determine the diameter (DN) size according to the inner diameter of the pipeline or the flow requirement.
2, interface mode, general > DN50 to choose the flange interface, ≤ DN50 can be selected according to user needs.
Third, the choice of electrical parameters:
It is convenient to use the conventional AC220V and DC24 as much as possible for the voltage specification.
4. Choose according to continuous working hours:
1. If the solenoid valve needs to be opened for a long time, and the time for the continuous closing time is excessive, the normally open type should be used.
2. If the time of opening is short or the time of opening and closing is not much, then the normally closed type is selected.
3. However, some working conditions for safety protection, such as furnace and kiln flame monitoring, cannot be selected for normal opening.
5. Select the solenoid valve according to the pressure parameters:
1. Nominal pressure: The pressure parameters are the same as those of other general-purpose valves, which are determined according to the nominal pressure of the pipeline.
2. Working pressure: If the working pressure is low, the direct-acting or step-by-step direct-acting principle must be used; when the minimum working pressure difference is above 0.04Mpa, direct-acting, step-by-step direct-acting, and pilot-operated can be used.
Six, according to special environmental requirements: explosion-proof, non-return, manual, waterproof fog, water shower, diving
1. Explosive environment: This environment must use the corresponding explosion-proof solenoid valve.
2. When the medium in the pipe has a backflow phenomenon, the solenoid valve with the check function should be selected.
3. If manual operation of the solenoid valve is required on site, a solenoid valve with manual function can be selected.
4, open-air installation or dusty occasions should use waterproof, dust-proof solenoid valve.
5, for the fountain must use submersible solenoid valve.

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