Double-eccentric butterfly valve

Short Description:

Double eccentric butterfly valve is also called high performance butterfly valve, which is mainly used for water plant, power plant, steel plant smelting, chemical industry, water source spring engineering, environmental facilities construction and other system drainage, especially suitable for waterway pipeline, as regulating and intercepting equipment. Compared with the center line butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, longer service life and good stability


Product Detail

FAQ

Product Tags

DN: DN50-DN800
PN: PN1.0MPa/PN1.6MPa
Connection type: wafer, flange
Operation: Hand wheel, worm gear, Pneumatic, Electric
Body: WCB, CF8, CF8M, CF3M, 904L, C4
Disc: WCB, CF8, CF8M, CF3M, 904L, C4
Seat: EPDM、RPTFE、PTFE
Medium: water, gas, oil, Acid-base liquid
Temperature: -29℃≤T≤150℃
Standard: GB/T12238-2008
Face to face: GB/T12221 API
Flange End: GB/T9113 API
Testing and inspection: GB/T13927 API

The double eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve. The structural feature is that the axis of the valve stem deviates from the center of the butterfly plate and the body. The effect of double eccentricity enables the butterfly plate to break away from the valve seat immediately after the valve is opened, greatly eliminates the unnecessary over extrusion and scratch phenomenon between the butterfly plate and the valve seat, reduces the opening resistance distance, reduces the wear and improves the service life of the valve seat. At the same time, the double eccentric butterfly valve can also use metal seat, which improves the application of butterfly valve in high temperature field.


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