Knowledge of butterfly valve type structure
Writer： admin Time：2019-11-07 11:15 Browse：℃
Butterfly valve is a kind of valve that USES disc type open and close piece to turn about 90 degrees to open, close and adjust fluid channel. Butterfly valve is simple in structure, small in volume, light in weight, saving in material consumption, small in installation size, small in driving torque, easy to operate, fast, and can also have a good flow rate and closed sealing function, is one of the fastest developing valve varieties in recent years. Especially in the United States, Japan, Germany, France, Italy and other industrial developed countries, butterfly valve is widely used. Its use of the variety and number is still continuing to expand, and to high temperature, high pressure, large diameter, high sealing, long life, excellent regulation characteristics and multi-function direction of a valve, its reliability and other performance indicators have reached a higher level, and has partially replaced the globe valve, gate valve and ball valve. With the advancement of butterfly valve technology, butterfly valve will become the dominant valve form.
The original butterfly valve was a simple, loosely closed baffle valve. It is usually used as the flow regulator and damper valve in the water pipe system.
With the application of synthetic rubber to prevent chemical corrosion, the performance of butterfly valve can be improved. Because synthetic rubber has corrosion resistance, erosion resistance, size stability, good resilience, easy to form, low cost and other characteristics, and according to different requirements to choose different performance of synthetic rubber to meet the service conditions of butterfly valve, so it is widely used in manufacturing butterfly valve lining and resilient seat.
Because of polytetrafluoroethylene (PTFE) have strong corrosion resistance, stable performance, not easy to aging, low friction coefficient, easy to shape, size stability, and can also be through filling, add the appropriate material to improve its comprehensive performance, get better strength, lower friction coefficient of butterfly valve sealing material, overcome some limitations of the synthetic rubber, and represented by PTFE polymer material and filling modification on the butterfly valve has been widely used, so that the butterfly valve, further improve the performance of the temperature and pressure is wider, sealing performance and longer service life of butterfly valve.