The Mechanism of Signal Butterfly Valve
1. Signal sanitary butterfly valve achieves the opening and closing and flow control by using driving devices like worm gear and worm shaft to drive the rotation of rotating axis and butterfly plate.
2. Rotate the hand wheel of worm gear and worm shaft to make the butterfly plate achieve the purpose of opening and closing and flow regulation. Clockwise rotation of the hand wheel closes the valve.
3. There are two ways to set micro-switch in the transmission box of worm gear and worm shaft:
a. The transmission box is equipped with two micro-switches that indicate open and closed separately. These two switches operate when the valve is in full open and full closed status, respectively. When the indicating light source of “valve open” and “valve closed” in the control room is connected, the status of valve will be accurately displayed.
b. The transmission box is equipped with micro-switch that indicates closed. When the butterfly plate moves from 0 degree to 40 degrees, the close signal of the valve is output. In 40 to 90 degrees positions, the open signal of the valve is output. The protruding wheel of the micro-switch can be adjusted to show the different positions of the butterfly plate.