Dampers

Indusco Environmental Services, Inc. offers a complete line of fiberglass dampers for all of your air handling needs, in sizes ranging from 4” to over 96” diameter. Dampers are an integral part of any air transfer system. Dampers can be used to regulate the amount of air collected from a pick-up location, as well as to isolate various parts of the air conveyance system.

The components of damper include the body, blade, shaft and operator. The body and the blade are constructed of fire retardant premium vinyl ester resin. The shaft can be constructed of either FRP or stainless steel. Operators can be as simple as a lever arm with locking quadrant or as complex as electric or pneumatically controlled gear operators. The grade of dampers begins with the most simple balancing type damper, our model IE101. This damper typically is equipped with a lever arm blade positioner. Shafts are typically constructed of FRP. The next grade of dampers is our model IE102 which is comparable to the IE201 but with the addition of an FRP blade stop. The blade stop is basically a small, approximately 3/8” high, lip on the body of the damper for the blade to close against. The blade stop is to further limit the amount of air leakage through the damper, in the closed position. Shafts are either FRP or 316 stainless steel. Operators are typically lever arms but hand or chainwheels are sometimes used. The next grade of damper is our model IE103, which has all of the features of the previous models but with the addition of a rubber wall wiper gasket. The wall wiper gasket is installed within the blade and seals against the blade stop to even further minimize air loss. The gasket can be constructed from EPDM, Neoprene or Viton. Operators are typically gear operated actuators.

Our top of the line damper is a positive seal, zero-leakage damper, the Model IE104. This damper is constructed with a slightly elliptical shaped blade, which actually seals against the interior wall of the damper. This damper comes equipped only with 316 stainless steel shafts and gear operated actuators. All exterior mounting plates, for the actuator, are also 316 stainless steel. This damper is used for isolation within the air conveyance system when minimizing air loss is critical. Actuators to open and close the dampers are also available in a variety of sizes and types. Typical types of actuators are hand wheels, chain wheels, and either electric or pneumatic motorized. For dampers that are accessible at ground-level or walkways, the hand wheel is the most economical, for dampers that can also be hand operated but are not accessible, the chainwheel is typically used. When dampers need to be opened by a timer or from a remote location, a motorized actuator is required.