The variations possible for these dampers are virtually infinite.
All types can be manufactured as either “open / close” or as control dampers, and in the case of diverter dampers, the blades may be linked and operated by a single actuator or they may be operated individually.
Dilution dampers could be of the flap type round or rectangular, and with resilient seats or rectangular louver construction with special seal arrangement to reduce indraught air leakage.
Swing dampers provide a means of keeping the blade out of the gas stream when in the open position and are particularly suitable for cases where the gas stream contains abrasive particulate.
Materials of construction and drive configurations are selected and designed to suit the application and customer requirements.