Fire butterfly valve is the abbreviation of fire signal butterfly valve and belongs to one of fire valves.

The fire valve is an important accessory controlled on industrial and building pipelines. The fire valve is composed of three parts: valve body, opening and closing mechanism and valve cover. Among them, the fire signal butterfly valve has the advantages of simple structure, reliable sealing, light opening, long service life and convenient maintenance. Therefore, it is widely used in various pipelines of Dalian marine valves, water supply and drainage, building fire protection and other systems, especially in fire protection pipelines.

Its working principle is briefly described as follows:

1. The signal butterfly valve is driven by the worm gear drive device to rotate the shaft and butterfly plate to realize opening and closing and control the flow.

2. Rotate the handwheel of the worm gear drive device to make the butterfly plate achieve the purpose of opening and closing and regulating the flow. The handwheel rotates clockwise to close the valve.

3. There are two types of microswitches installed in the worm gear transmission box.