High Temperature Butterfly Damper


The Butterfly valves intended for low pressure gas lines and air lines. The lightweight construction with the narrow wafer body enables easy fitment of these valves in ducts, manifolds and exhaust lines without additional support or strengthening of pipe lines. These valves are primarily intended for low – pressure large volume gas / air flow control applications. The absence of seat substantially reduces the valve operating torque requirements and makes the valve very effective for flow control / regulation duties. This is an ideal choice for furnace air flow and combustion control applications. Even though the body is designed for a maximum pressure of 2.5 bar the maximum shut off pressure is limited to 0.5 bar only .The disc flap is held in position by a stub shaft with an axial locking arrangement provided on the top shaft. The top shaft sealing is through stuffing box type gland sealing arrangement, which is field adjustable


Construction & Type

Centric Disc, Seatless Butterfly damper

Body type

Narrow wafer single piece

End connection

Wafer, sandwiched between flanges

Size range

40 NB to 1200 NB

Maximum operating pressure

0.5 bar (max)

Operating temperature range

-250 C to 6000 C (depending on MOC)


Manual or actuated with Pneumatic / Electric actuator

Standard Material of Construction (MOC)


WCB / CF8 / CF8M



CS-IS 2062 / SS 304 / SS 316



AISI 410 / SS 316 SH

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