IBV - Indicating Butterfly Valve Spec Sheet
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(Underwriters Laboratory Listed and FM Approved)
Butterfly valves for above ground use shall be of the indicating type with a highly visible yellow flag on the valve actuator which indicates whether the valve is open or closed.
The valve actuator shall be a traveling nut type and have an input rating of 450 ft. lbs. of torque against the input stops.
Externally, the actuator shall be driven by a crank or 2" nut which is affixed to the input shaft by a shear pin.
Butterfly valves shall be Pratt Indicating Butterfly Valves Underwriters Laboratory listed and Factory Mutual approved or approved equal.
Valves shall be manufactured in accordance with AWWA C504-94, Class 150B.