Louver Dampers By Fouress Engg. (India) Limited

We are making, exporting and supplying of Louver Dampers in Kolkata, West Bengal, India. Louvre dampers are designed to provided a guaranteed sealing efficiency of 99.9%, or better, on cross-sectional area. They incorporate various flexible metallic sealing systems made of austenitic stainless steel or high nickel alloys. Units can be supplied for both circular and rectangular ducts of all size for temperatures and differential pressures upto, and in excess of 650OC and 2000 mm H2O respectively.

Sealing System

FOURESS Louvre Isolators are provided with the leaf spring type sealing system made up of stainless steel AISI 316 or inconel 625 seals based on end application. The sealing system consists of a thin metal leaf strip.

Predeflected by a bias spring.
The seal strip is pressed against the landing surface.
Either in the frame or on the adjacent blade, forming a flat, 20 mm wide, sealing surface. The operational deflection of the sealing element is 17mm and it can tolerate up to 12mm misalignment without any decrease in sealing efficiency. In the open position the seal is prevented from fluttering by a support plate.
Against which the seal strip is held by the bias spring.