Principle and wiring of electric butterfly valve
Electric Butterfly Valve there are common and intelligent models. Common type, when connected to the motor, the valve will open or close, depending on the motor reverse; Intelligent model such as AC380V, AC380V to its supply, the motor does not move, the internal control circuit board can work. When a current of 4-20ma is input to it, do the corresponding action. Close at 4mA and open at 20mA. And there are 4 -- 20mA analog quantity feedback signals to reflect its valve opening size.
Electric butterfly valve is composed of electric actuator and butterfly valve, electric actuator is 90 degrees rotation, there are switch and adjustment type of two control modes, through the electric actuator rotation drive butterfly valve open and close. With manual operation function, in case of power failure through manual operation to switch the butterfly valve.
Common electric butterfly valve wiring diagram:
As follows: switch type with source light indicating electric butterfly valve wiring diagram, a total of 5 wiring, 1,2,3 is the control part, 1,4,5 is the feedback part.
Switch type with passive contact type feedback electric butterfly valve wiring diagram, 1,2,3 is the control part wiring, 4,5,6 for passive contact feedback.
Switch type with open signal feedback electric butterfly valve wiring diagram. 1, 2 and 3 are the control wiring parts, 4, 5 and 6 are the feedback parts, and the output resistance value of 0-5k can be selected.
AC380V three-phase power supply electric butterfly valve wiring diagram:
Wiring diagram of intelligent regulating electric butterfly valve, input and output 4-20ma: