The concentric butterfly valve is characterized by the stem center, disc center and body center in the
same position. Such structures are simple to make. The common wafer rubber lined butterfly valves are of this type. The drawback is that the disc and seat are always in the extrusion, scraping state, large resistance, fast wear. In order to overcome squeeze, scratch, seal performance, seat basically uses rubber or polytetrafluoroethylene elastomeric material, but also because seal material is used on the limit of temperature, this is why traditionally people think the butterfly valve does not bear high-temperature reason.
ZECO is one of the most professional control valve manufacturers in china, and we have been devoted to produce control valve china for many years. If you want to know more details or want a quotation, just feel free to contact us!
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