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CONCENTRIC and ECCENTRIC BUTTERFLY VALVES
DESIGN FEATURES
BRIEFS
Product
Concentric Butterfly Valve
Type
Wafer, Lug, Flanged Type
Size
50A~1200A / API, DIN, JIS
Materials
Ductile, Carbon, Stainless, Bronze
Operation
Lever, Gear, Actuator
Origin
Power Plant, Chemical Industry, Crude Oil etc,.
CLASSIFICATION BY CONNECTION TYPE
Wafer
-Valve to be installed with long bolts between the flanges at adjacent pipe without flange on the valve. -Ease handling and light weight. -Ease installation, less bolt quantity and low cost. -Inconvenient maintenance of adjacent pipe.
Lug
-Ring shape bolt hole for bolting with flange. -Keep pressure inside during repairing adjacent one side pipe. -Different flange shape. -Possible damage on full face gasket. -Hard repairing of corroded bolt. -More man-hour for installation.
Flanged
-Both ends with complete flange. -Suitable to general pipe flange. -Suitable for shipside valve in the ship. -Heavy weight. -Same installation as ordinary valve.
TRIPLE OFFSET BUTTERFLY VALVE
BRIEFS
Product
Triple Offset Butterfly Valve
Type
Wafer, Lug, Flanged(D/F) Type
Size
80A~600A / API, DIN, JIS
Materials
Ductile, Carbon, Stainless, Bronze
Operation
Lever, Gear, Actuator
THE TRIPLE-OFFSET GEOMETRY
* OFFSET 1 : The shaft is offset behind the seat axis to allow complete sealing contact around the entire seat. * OFFSET 2 : The shaft centerline is offset from the pipe and valve which provides interference free operating of the valve. * OFFSET 3 : The seat cone axis is offset from the shaft centerline to eliminate friction during operating.
