Solenoid Valve Precautions

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 I. Security:
1 corrosive media: king should use plastic solenoid valves and stainless steel; For highly corrosive media must use isolation diaphragm. Neutral medium, it should use copper alloy m aterial solenoid valve casing, otherwise the housing desquamation often rust, especially the action infrequent

Occasions. Ammonia can not be used with the valve copper.
2 Explosive environment: to choose the appropriate proof grade products, outdoor installation or dusty places should use waterproof, dustproof varieties.
3 solenoid valve nominal pressure should exceed the maximum working pressure of the tube.
    Two. Applicability:
    1 media characteristics
1) The quality of gas, liquid or mixed states, which are used in different varieties of solenoid valves.
2) Medium temperature different specifications, otherwise the coil will burn, seals aging, seriously affecting the life of life.
3) medium viscosity, usually 50cSt less.
4) Media cleanliness is not high when the electromagnetic valve should be installed before the recoil filter valve, low pressure fashion can choose straight diaphragm s olenoid valve.
5) If the directional flow medium, and not allowed back.
6) medium temperature should be chosen within the allowable range solenoid valve.
    2 pipe parameters
1) under medium flow pipe connection requirements and mode selection valve openings and models.
2) According to the selected flow and valve Kv value DN, also optional with pipe diameter.
3) Working pressure
Minimum working pressure at 0.04Mpa above is optional indirect Pilot; minimum working pressure close to or less than zero must be selected direct-acting or step direct type.
    3 Environmental Conditions
1) Setting the maximum and minimum temperature should be selected within the allowable range.
2) the environment of high relative humidity and a drop of rain and so on, should be selected water solenoid valve
3) the environment, often vibration, bumps and shocks occasion should choose special varieties.
4) in a corrosive or explosive environment should be given priority in the use of safety requirements according to selected anti - hair loss
5) If the restricted environment of space, please use the multi-function valve, because eliminating the need for bypass and three manual valves and easy online service.
    4 Power Conditions
1) According to the power supply types were selected to AC and DC solenoid valve . Generally AC power access convenient.
2) voltage specifications.
3) Power supply voltage fluctuations are usually used% 10% -15%, DC to allow ±% 10 or so.
4) should be based on the rated power capacity current and power consumption. VA should be noted that when starting the exchange value is higher, the lack of capacity should be preferred indirect electromagnetic valves.
    5 control accuracy
A) ordinary solenoid valve only opening and closing two locations in the control of high precision and parameters for a smooth, please choose a number of solenoid valve; three normally open solenoid valve, with Weiqi, fully open and close three kinds of traffic;
Combination of multi-valve with open, wide open, small open, open four traffic.
2) Operating time: refers to connect or disconnect signal to the main valve action completion time.
    Third, Reliability:
1, working life, this is not included factory pilot project, are type tests.
2, Operating mode: sub-long work, repeated short-time work and short-time work three.
3, Operating frequency: frequency of demanding action, the structure should be optimized direct acting solenoid valve, the power to listen to the exchange preferred.
4, operating reliability: rigorous professional standards solenoid valve.
    Four. Economy:
   It selects one of its scale, but it must be in a safe, suitable and reliable bas ed on the economy. Economy is not only the price of products, but also to give priority to their functionality and quality of installation and maintenance and other accessories required fees.
    V. Environmental protection:
    Environmental pollution and solenoid valves for corrosive fluids, external pilot valve diaphragm valve can be replaced in pollution and work under high viscosity fluids can also have a longer pot life and the body of the actuator diaphragm seal isolates the working fluid and the executing agency for
To pollution and corrosive fluids.