· valve overload protection;
· valve stroke protection;
· manual, electric switching device;
· in situ/in remote control switch
· valve opening position indicator transmitter, can send out 4 ~ and ma signal.
· valve open and close, the direction of travel switch each have 4 to the independent contact, the contact capacity at least for 220 vac, moment switch to not less than 2.
The contact wire derivation of the meet local and remote control requirements.
 

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