I believe that those of you who have dealt with valves are not unfamiliar with the names of these butterfly valves. However, Dervos found that there are still many friends who can't tell the differences between a concentric butterfly valve and aWafer butterfly valve, and some may even think that they are different names fora same valve. But it's not. This article will introduce you to the difference between a concentric butterfly valve and aWafer butterfly valve.

Concentric butterfly valve isnamed after the structural form of the valve. In addition to concentric butterfly valve, there are also single eccentric butterfly valve, double eccentric butterfly valve, triple eccentric butterfly valve several.They are named conforming tothe position of the centre of the butterfly plate in the valve body.In terms of structure,the concentric butterfly valve is characterized by the stem axis, the butterfly plate centre and the body centre being in the same position.

The concentric butterfly valve has a simple structure, and usually soft-seated. Rubber or PTFE or other resilient materials are most common;The concentric butterfly valve has very good sealing performance, and can achieve zero leakage. But limited by the sealing material itself, the concentric butterfly valve can only beapplied to normal temperature and low pressure environment. Its not recommended to use them in high temperature and high pressure.

Wafer butterfly valve is named according to the butterfly valve's connection method. In addition toWafer, there are also flange connections,clamp connection,socket-ed,welded and so on.

Wafer butterfly valves can be soft-sealed ormetallic-sealed; they can be ofconcentric or eccentric.A concentric butterfly valves may be either clamped or flanged. Aconcentric butterfly valve may be aWafer connection, and aWafer butterfly valve may also be ofconcentric construction.

Therefore, the concentric and Wafer are two different butterfly valve classifications, the two are actually not comparable. Choose the correct butterfly valve according to the different working conditions, and that’s all.

Dervos is a leading valve manufacturer and provider of engineered products for different industries in China. If you’re looking for professional feasible solutions, check out our vast range of high-quality valves which covers gate valves, ball valves, butterfly valves, as well as other control valves and more.

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