How many positions does a 220v electric cut-off valve have?
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As the title suggests, a normal pneumatic cut-off valve consists of a solenoid valve (DO) and switch feedback (2 DIs). What about a 220V electric cut-off valve? Are there two DOs for on and off, or is it just one DO like in the pneumatic version?
The two simplest DOs. Typical electric actuators also have settings for signal loss (fault off, fault on, fault hold) and power loss (fault off, fault on, fault hold). It is possible to check with the manufacturer to see if single DO control can be achieved through signal loss settings.
Electric cut-off valves lack FO and FC, so they can only maintain their position in the event of a power loss. If you need electric quick-opening valves, feel free to contact me.