Pratt Triton Rubber Seated Butterfly Valve

All butterfly valves shall be of the tight closing, rubber
seated type and fully comply with the latest revision
of AWWA Standard C504/C516 and NSF61, where
applicable. Valves shall be bubble-tight at rated
pressures in either direction, and shall be satisfactory
for applications involving throttling service and for
applications requiring valve actuation after long periods
of inactivity. Valve discs shall rotate 90˚ from the full open
position to the tight shut position. Regardless of valve
size, angular misposition of disc can be up to 1˚ off center
without leakage.