Difference between ball valve and butterfly valve?
Writer： admin Time：2019-11-07 10:41 Browse：℃
What are the differences between ball valves and butterfly valves? Below with small make up to understand next!!!
1, the valve and butterfly valve cut-off way is different: the ball valve through the ball blocking the channel to achieve the pipe cut-off circulation; Butterfly valve by the butterfly wing, spread out the sealed pipe is not in circulation.
Second, the structure of the valve and butterfly valve is different: the ball valve is composed of valve body, valve core, stem components, the body can only see part of the parts; Butterfly valve is composed of body, seat, disc, stem, all parts are exposed to the outside. Therefore, it can be seen that the sealing of butterfly valve is not as good as that of ball valve. When it comes to sealing, butterfly valve is also divided into soft seal and hard seal. Butterfly valve structure is relatively simple, can only be used in low pressure environment, up to 64 kg pressure. Compared with the ball valve, the highest ball valve up to about 100 kg.
Three, valve and butterfly valve working principle is different: the ball valve has 90 degrees of rotation, only because its opening and closing is a ball, only need to operate 90 degrees of rotation can be opened or closed, the most suitable for the switch. But now v-ball valves can be used to regulate or control flow. And butterfly valve is to use disc type opening and closing parts reciprocating rotation of 90° or so to open, close or adjust the flow of media a valve, has a good function of regulating flow, is one of the fastest developing valve varieties.
Advantages of butterfly valve
1. Simple structure, small volume and light weight; The disadvantage is that the use of pressure and operating temperature than the ball valve range is much smaller.
2. Good sealing can be achieved under low pressure; The disadvantage is that the sealing is much worse than the ball valve.
3, can transport mud, in the mouth of the pipe deposit the least liquid, is better than the ball valve.
4, the structure principle of butterfly valve is suitable for large caliber valve, widely used in petroleum, gas, chemical industry and other industries.