Louver Dampers

Single, multiple and opposed blade louver dampers

The louver type of damper consists of several blades mounted parallel across a duct, with centrally pivoted. The drive for a louver is simple, needing only 90° of motion.  If a damper must open or close quickly, the louver type is the only practical choice. In case of emergency actuators, air and oil cylinders will be able to actuate louver dampers with little difficulty.

Louver dampers are best applied to balance or control flow, based on application/ service, the damper can be single or multiple louver type. Opposed blade louver dampers are used for finer control of a large volume of air/gas.

Louver dampers in a coal fired unit range are located all the way from the induced draft fan and the primary air system to the flue gas scrubber outlets.

Opposed blades louver dampers are the most effective type of damper for controlling the flow of gases with the least disturbance to flow in ducts. Blade pairs are carefully fitted to ensure precise operation in opposing directions, and thus creating highly controllable passages for the gas. A non-binding, fully adjustable external linkage is used to operate the damper.

The double louver damper is used to combine flow control with the capability of 100 % isolation.

The damper is configured with two rows of blades in a frame. Perfect isolation is achieved by closing the blades and pressurizing the space between the two rows with ambient air at a pressure greater than the upstream pressure in the duct. The air barrier prevents leakage of flue gas into the isolated area and also ventilates the downstream area with clean air.

Radial vane louver dampers have centre-supported radial blades spaced around a circular frame. They are rotated by a linkage outside the ring frame.  The blades usually turn in the same direction, so this damper imparts whirl to the air.

contact@ee2i.com with the following details for techno- commercial offer
Type- Single louver/ multiple louver
Location- Vertical/ horizontal / inclined
Service- Air/ hot gas
Flow/ pressure/ temperature