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The double eccentric butterfly valve is further improved on the basis of the single eccentric butterfly valve. Its structural feature is that the axis of the valve stem deviates from the center of the butterfly plate and the center of the body. The double eccentric effect enables the butterfly plate to be released from the valve seat immediately after the valve is opened, which greatly eliminates unnecessary excessive squeezing and scratching of the butterfly plate and the valve seat, reduces the opening resistance, reduces wear and improves Seat life
Size: 1 1/2”~48” (Class150LB~600LB)
Connection Ends: Flange, Wafer, Lug
Design & Manufacture: API609
Face to Face Standard: API609 ASME B16.10
Ends: API609, ASME B16.5, ISO5752
Test & Inspect: API598
Range of Materials:
ASTM 216 WCB, ASTM A351 CF8, ASME A351 CF8M, Al-Bronze etc.
Double eccentric design can provide less contact surface (butterfly plate and sealing ring).
The plate has a curved arch bridge design, which greatly increases the strength of the plate.
The connection between the shaft and the plate adopts a special tangent bolt, which can make the plate and the shaft completely interchangeable, increasing the close combination between two of them.
Mainly suitable for the drainage of water plants, power plants, steel smelting, chemical engineering, water source engineering, environmental facility construction, etc., especially suitable for water pipelines, as regulating and intercepting equipment.
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