UnisonHKR contributes for the production and customer’s requirements with continuous technical development and engineering. With this strength, UnisonHKR had performed many Boilers, HRSG and FGD projects.

Boiler & HRSG Damper

The boiler damper must be designed with consideration of high temperature. Also, installation of insulation & liner or CASTABLE construction is required.
Thermal expansion and blade deflection should be considered first for preventing deformation by high temperature. we have secured high technology for boiler damper engineering that considers above factors.

FGD Damper

Damper for FGD is composed of inlet damper, outlet damper and bypass damper for emergency. Due to flue gas, all exposed part shall be high alloy that has high corrosion resistance.
To prevent leakage in damper, seal air system is required. This seal air system includes steam heater with temperature control valve for maintaining temperature, steam trap for draining condensate water from steam heater and some instruments such as temperature transmitter, pressure transmitter and temperature element.

Product Line

Louver Damper

Louver Damper has short open-close time and is widely used for quick separation of gas, bypassing and adjusting in industrial and utility plants.
Also, blades of louver damper are divided into several sections and require less power(torque). It may be applied to circular and rectangular ducts. Due to louver damper being lightweight and compact, gas flow interference occurs less often in any location.

Tandem Damper

Tandem damper is the “Zero Leakage Damper” and is used in every system. The design of the tandem damper is more compact and economic than double louver damper.
It may perform “Zero Leakage” with seal air system and heating system.

Guillotine Damper

Guillotine damper has higher efficiency for zero leakage than other dampers. It’s typically used for tight sealing. Unlike other dampers, it may be installed without interference between blade and other facilities.
Also, Guillotine damper can be used as dual with other dampers.

Stack Damper

Stack damper is installed at stacks of industrial and power plants. It is used for keeping out rain and preventing boiler cooling at shut-down.

Wafer Damper

Wafer(butterfly) damper is a circular damper that has one blade and installed at small duct. It cannot be used for adjusting flow rate like louver damper but installation and maintenance are easy.

Diverter Damper

Diverter damper is used in the HRSG (Heat Recovery Steam Generation) system. Unlike other dampers, it can be applied at ducts which allows a fast flow. And also, it can switch gas flow into cogen & bypass mode with one blade. Therefore, it is economically better than using 2 dampers.

Poppet Damper

Poppet damper can be used as a valve type and sometimes utilizes operating with temperature and pressure signal as a vent damper for preventing explosion.