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BT300/BT320 Triple Offset Butterfly Valves | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BT300, BT320 triple-offset butterfly
valves, shaft offset is created by designing the valve with the shaft located
behind the centerline of the sealing surface (offset1) and slightly to one side
of the pipe centerline (offset2). The third offset is point of intersection of
tangents of seat and disc sealing deviating from the disc face. These offets are to completely eliminate
all disc to seat friction throughout the valve’s entire 90 degrees of rotation.
Metal seal, laminated seat are optional. The triple-offset provides ANSI
ClassIV, V, VI leakage performance. The seat seal ring can be changed easily
from the body. BT300 is wafer type,BT320 is double flanged type. Triple-offset Construction
Specifications
Body Size/L Calss Body:10” and under,M Class Body:4” and under
Body Size/L Calss Body:12” and over,M Class Body:6” and over
Solid Metal Seat
Laminated Seat
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