Leak Proof Butterfly Damper is used for suspended solids, where leakage is allowable up to the extent of 0.002% to 3% of the total flow. The Butterfly Damper can absorb piping stresses effectively. The Butterfly Damper is light in weight with better mechanical and structural properties. Leak Proof Butterfly Damper is used for Throttling control of air, liquid steam, gas and other varied types of fluids.