Butterfly Valve

Eccentric Double Falnge Type Butterfly Valve

1. Design and manufacture: EN 593/BS 5155.
2. Flange dimensions: EN 1092-2/ASME B16.1.
3. Top flange dimensions: ISO 5211.
4. Face to face dimensions: EN 558/ISO 5752/DIN 3202.
5. Test and inspection: API 598/EN12266.
6. Size up to 120".

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Specifications:

Size: DN50-DN2000

Pressure: PN10/16/25/40 Class150/300

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Materials:

Body : WCB

Disc: WCB

Seal : WCB+PTFE

Stem : SS410

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Operated:Electric Type

Applicable medium：Water, Oil, Gas

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Double eccentric butterfly valve:
On the basis of the single eccentric butterfly valve, the most widely used double eccentric butterfly valve is further improved and formed. Its structural feature is that the shaft center of the valve stem deviates from the center of the disc and the center of the body. The effect of double eccentricity enables the disc to break away from the valve seat immediately after the valve is opened, which greatly eliminates unnecessary excessive extrusion and scratching between the disc and the valve seat, reduces the opening resistance, reduces wear, and improves the Seat life.

Product Name		Double Eccentric Butterfly Valve
Size (mm)		50-2000mm
Flange connection		BS4504 PN10, PN16, PN25 and PN40. DIN2501 PN10, PN16, PN25 and PN40. ANSI B16.5, 16.47 / 150LB, 300LB JIS 10K, 16K & 20K / 30K / 40K
Face to Face Dimensions		API609,BS5155,ISO5752,ANSI16.34
Material	Body	WCB; CF8; CF8M; Al-bronze;STL
	Disc	WCB; CF8; CF8M; Al-bronze;STL
	Stem	SS410/420/416; Monel
	Seat	CF8; CF8M;STL+Flexible Graphite
	Packing	Flexible Graphite;PTFE
Operating		Wormgear; Electric; Pneumatic ;

Application:
1.Nuclear power Plants Petrochemical plants
2.Petroleum refinery Fossil power plants
3.Fire safe line Exhaust gas line & Steam line
4.Cryogenic services