Product Overview

Signal butterfly valves are widely used in pipeline systems for petroleum, chemical, food, pharmaceutical, papermaking, hydropower, marine, water supply and drainage, smelting, energy and other industrial fields. They can be used as control and throttling devices for pipelines and containers carrying corrosive and non-corrosive gases, liquids, semi-fluids and solid powders. They are particularly suitable for high-rise building fire protection systems and other pipeline systems that need to display valve open and close status.

Signal Butterfly Valve Wiring Method

1. Open the cover of the electrical switch box. Connect the cable cores to the corresponding terminals in compliance with electrical control requirements. Seal the cable inlet and fix the cable firmly to prevent external force damage to the cable connection.

2. When the valve is in the fully closed position, rotate the lower closing cam clockwise until the cam gently touches the micro switch (a click sound can be heard), then tighten the fixing screw to secure the cam in place.

3. When the valve is in the fully open position, rotate the upper opening cam counterclockwise and adjust the opening cam in the same way as above.

4. Adjust the limit screws. When the valve reaches the fully open or fully closed position, ensure there is a certain gap between the limit screw and the limit plane of the worm gear, then tighten the lock nut on the limit screw.

5. Install and fasten the electrical switch box cover. With the valve fully closed, align the pointer of the position indicator with the “0” scale on the dial, then tighten the screw to fix the pointer.

Working Principle of Signal Butterfly Valve

1. The built-in worm gear drives the rotating shaft and butterfly disc to rotate, realizing valve opening, closing and flow control.

2. Rotating the handwheel of the worm gear transmission device opens and closes the butterfly disc to adjust pipeline flow. Clockwise rotation of the handwheel closes the valve.

3. Two types of micro switch structures are installed inside the worm gear transmission box:

• Type A: Equipped with two independent micro switches for opening and closing respectively. The switches act when the valve is fully open or fully closed, turning on the corresponding “valve open” and “valve closed” indicator lights in the control room to accurately feedback the valve working status.

• Type B: Equipped with one directional micro switch. The butterfly disc is fully closed at 0°. When the disc opening ranges from 0° to 40°, the micro switch outputs a valve closed signal; when the disc opening ranges from 40° to 90°, another normally closed circuit outputs a valve open signal. The micro switch cam is adjustable to adapt to different disc position feedback requirements.