Dampers have a wide range of applications in manufacturing lines. For example, they are

used to control the amount and direction of air flow in the duct line and to block isolate toxic gases. Dampers come in a variety of forms depending on the application.

Types of

KC Cottrell produces seven types of dampers: louver, guillotine, diverter, wafer (butterfly), poppet, radial vane, and stack damper. Depending on their operating method, dampers can be classified into isolation type and modulation type. They can also be categorized into zero leakage damper and low leakage damper depending on the allowed leakage rate.

Louver Dampers

Controls the amount of airflow into a duct

Manual and automatic operation

Can be used for operation at high speeds

Applicable for low leakage and zero leakage

Stack Isolation Dampers

Used in stacks

Suitable for protecting equipment

or blocking rain during downtim

Guillotine Dampers

Suitable for intermittent operations

A drawback is low operating speed

Horizontal, vertical or lateral installation

Tandem Dampers

Zero Leakage Type that has similar function with

Double Louver Damper

Decrease in cost due to lower Damper Size and Weight   

Diverter Dampers

Main application is HRSG

Flow rate inside the damper can be set to 45m/sec

More economical than using two damper sets

Operation possible at high  temperatures

Radial Vane Dampers

Installed before or after the fan Used for speed and flow rate control

Wafer Dampers

Mainly used in circular duct lines

Economical and appropriate for low pressure conditions

Double & single wafer are available depending on the leakage rate

PoPPet Dampers

Used for explosion prevention in times of emergency in production lines

Applicable for high speed operation