Halton - Model HFB -Airflow Management Damper

• Control damper for different airflow and duct pressure control applications
• Pressure-independent operation
• Galvanized steel design
• Circular duct connection equipped with integrated rubber gaskets
• Minimum airflow is related to 1 m/s on specific product models

Product Models & Accessories

• Model with shut-off operation; tightness fulfills EN 1751, class 4 requirements (HFB/G and HFB/I)
• Casing tightness fulfills EN 1751, class C requirements
• Model with external insulation
• Several sound attenuator models
• Several airflow controller options
• 1 m/s - minimum airflow - the HFB/G and HFB/I with one of following controller options of EM, EK, EC, EE
• 2 m/s - minimum airflow - any HFB models with controller option of EM, EK, EC, EE, ED, EG
• Electric reheat coil options
• Factory-set airflow range limits (min./max. airflow rates) as an option

The pressure-independent variable airflow control damper is made of galvanised steel, with an airflow measurement probe of aluminium.

The tightness of the control damper in closed position conforms to standard EN1751 class 4 and casing tightness to EN 1751/C.
Duct connection includes integral airtight rubber gaskets.

The management damper section contains airflow measurement, flow controller and damper actuator.

Design airflow range limits are calibrated at the factory.
Controller settings canbe adjustable on site with a PC or a handheld tool.
The airflow controller has control signal input 0...10 VDC or 2 ...10 VDC and output 0...10 VDC for airflow feedback.
Supply power is 24 VAC.

The damper is equipped with a sound attenuator in order to meet the sound level requirement for the room. As an optional extra, the sound attenuator has an access panel for cleaning purposes.

The airflow controller comprises an electric reheat coil with power supply of 230 VAC. Incorporated within the reheat coil has a safety overheat thermostat with both automatic and manual reset. A 3rd party room controller is needed to control the duct heater with 0...10 VDC control signal.