Discussion on the operating temperature of solenoid valves
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In the technical specifications of solenoid valves, only the maximum operating temperature is usually indicated. Solenoid valves are typically operated in a powered state (i.e., they remain powered under normal conditions and lose power only in case of interlocks), which causes them to generate heat; as a result, their temperature is usually 10 to 20 degrees higher than the ambient temperature. Normally, the inspection of the operating condition of solenoid valves is carried out by measuring their temperature. Because it’s difficult to measure the specific ambient temperature. However, there are no test data available regarding the heat generation of solenoid valves at different ambient temperatures, which often leads to excessive concern among process engineers. On the other hand, instrument technicians lack concrete evidence and cannot guarantee that there are no problems, so they have to take some cooling measures, which puts them in a very passive position. Has anyone with expertise accumulated data in this area? Please share it! Thank you in advance!
Does the temperature of the solenoid valve itself affect its performance? If it gets too hot and gets damaged, won’t it no longer be powered? Please give some advice
It is normal for a solenoid valve to heat up when powered, as it is essentially an electromagnet; it is normal for heat to be generated over time in a coil that is under electrical current, as long as this temperature does not exceed the specified limit for the coil.
The operating temperature of the solenoid valve must be considered in conjunction with the explosion-proof environment in which it is used, in order to select the appropriate explosion-proof rating for the solenoid valve. The others should have no impact. :D
Solenoids have certain requirements regarding ambient temperature, which should be taken into account when selecting them.
By selecting between normally open and normally closed based on the process, it is possible to avoid excessive stress among inspectors caused by heat generated by coils that remain powered on for long periods of time!