The difference between wafer butterfly valve and flange butterfly valve

The difference between wafer butterfly valve and flange butterfly valve

As one of the most common valves in pipelines, electric butterfly valves are used to realize medium switching and flow control in pipeline systems. It has been widely used in petroleum, chemical industry, metallurgy, hydropower and many other fields. Among the commonly used electric butterfly valves, they are mainly divided into electric clamp butterfly valves and electric flange butterfly valves, which have their own characteristics and different performances and can be used in different industries. For these two kinds of valves, in addition to the structural form, if the same parameters are used, the biggest difference is that the connection is different, that is, the installation form needs to depend on the working conditions!

The difference between electric wafer butterfly valve and electric flange butterfly valve:
The thickness of electric wafer butterfly valve is thinner than that of flange butterfly valve. There are no flanges at both ends of the valve body and only a few guide bolt holes. The valve is connected with the flange at the pipe end through a set of bolts/nuts. It is a place where space is relatively narrow or where pipes are limited. The advantages are easy disassembly, low cost of valves and small occupancy of space, but the disadvantage is that there is a problem with the sealing surface, so two sealing surfaces must be removed.
The electric flange butterfly valve body has flanges at both ends and is connected with pipe flanges. Sealing performance is more reliable than wafer butterfly valve. It is usually used in large caliber or high pressure areas, but the cost is relatively high. Electric clip butterfly valves cost a lot.

However, there are still some matters needing attention in the design. For example, valve bolts are usually very long. Under the high temperature, bolt expansion may lead to leakage, so it is not suitable for large diameter at high temperature. For example, clamp butterfly valves can not be used at the end of the pipeline, and the downstream needs to be disassembled, because when the downstream flange is removed, the clamp valve will fall off, which must be very short. Although the flange butterfly valve does not have the above problems, the cost will be relatively higher.

As one of the leading manufacturers of wafer butterfly valves in China, Zhengfeng Valve is committed to manufacturing high quality wafer butterfly valves. Welcome to inquire!

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