What parameters are required when requesting a quote for the actuation mechanism of an electric valve?
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I have always worked on pneumatic valves; I haven’t dealt with electric valves before. What parameters should be listed in the quotation sheet? 220V, explosion-proof, straight-stroke, fault location – that’s all I can think of. There seem to be electric valves that operate on 380V as well; in what situations is 380V used?
Operating voltage, control power, ambient temperature, absence of highly corrosive or flammable/explosive substances in the surroundings, relative humidity, temperature, physical dimensions, opening dimensions, weight, valve torque, and so on
It’s just that the voltage levels are different; check what the voltage of the power supply at the site is, and choose the one with a voltage level that matches that of the other loads – this will make maintenance easier in the future
Is it unrelated to the actuator thrust? It depends on whether the electrical department provides a power supply of 220V or 380V on site
Conventional electric valves do not have a fault position; they maintain their position even after power is lost.
There is a certain relationship; some manufacturers’ 220V products do not have very high maximum torque, so if one needs higher torque, it is necessary to choose the 380V version