The fire signal butterfly valve is applicable to the pipelines of petroleum, chemical, food, medicine, papermaking, hydropower, shipping, water supply and drainage, smelting, energy and other systems. It can be used as regulating and throttling equipment on various corrosive and non corrosive gas, liquid, semi fluid and solid powder pipelines and vessels. In particular, it is widely used in the fire protection system of high-rise buildings and other pipeline systems that need to display the valve switch status.
characteristic:
1. Small and light, easy to disassemble and repair, and can be installed on the positioning position.
2. The structure is simple and compact, and the 90 ° rotation opens and closes quickly.
3. Small operating torque, labor saving and light.
4. Achieve complete sealing and zero leakage in gas test.
5. Select different parts and materials, which can be applied to a variety of media.
6. The flow characteristics tend to be straight and the regulation performance is good.
7. The number of opening and closing tests is up to ten thousand, and the service life is long.
8. The pipeline using gate valve, check valve (spherical shut-off valve), stop valve, plug valve, rubber pipe valve and diaphragm valve can be replaced with this valve, especially in the fire protection system of high-rise buildings and the pipeline system that needs to display the valve switch status.
working principle:
1. The signal butterfly valve is driven by the worm gear and worm drive device to rotate the shaft and the butterfly plate to realize opening and closing and control the flow.
2. Rotate the handwheel of the worm gear and worm 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:
a. There are two microswitches in the transmission box, i.e. open and close, which act in turn when the valve is fully opened and closed, and connect the “valve on” and “valve off” indicator light sources in the control room to accurately display the valve switch status.
b. A close direction microswitch is set in the transmission box (the fully closed position of the butterfly plate is 0 °). When the butterfly plate is at the position of 0 ° ~ 40 °, the microswitch acts to output the valve closing signal. When the butterfly plate is at the position of 40 ° ~ 90 °, the other pair of normally closed can output the valve opening signal. The cam pressing the micro switch can be adjusted to display the different positions of the butterfly plate.
Post time: Jul-28-2022