Electric on/off valve – Input signal selection
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The last edit to this post was made by stone_HOTO on 2020-8-23 at 19:56. When designing an electric on/off valve, it is necessary to choose an explosion protection rating of ExdIICT4. What is the difference between this rating and the input signal with an explosion protection rating of ExdIIBT? How should one make a choice?
Passive contacts can be selected, along with a 220V power supply for the electric actuator; the explosion protection rating meets the required standards. Specifically, what type of electric on-off valve is it, and is it of the angle-action or linear-action type?
There’s no difference really; explosion protection depends on the design of the actuator’s housing, doesn’t it?
No difference. You can connect whatever type is supported
Flameproofing doesn’t seem to impose any requirements on the signal. Intrinsic safety also has requirements for signals.