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BSB Engineering Services Limited
Unit E
Tribune Drive
Trinity Trading Estate
Sittingbourne
Kent ME 10 2PD
T: +44(0)1795 422609
F: +44(0)1795 429543
Contact
our Sales Office for more information
BD Series Literature
Download Brochure
Operating and maintenance
Options
Flangefit
(max. 600W x 1000H)
Framefit
(max. 600W x 1000H)
Spigotfit
(max. 600W x 1000H)
Circular
Spigotfit
(max. 600dia.)
Multiple assemblies available
Product Range
Control Panel Systems
DD Series
FD Series
FSD-TD Series
HD Series
SB Series
SC Series
SF Series
Product Range
BD Series – Backdraught Dampers
The
BD Series Backdraught Damper is self-opening subject to air velocity and
is designed to restrict air back flow.
The damper can be fitted to partitions or brick walls, on plenums or duct mounted.
Features
• Standard case construction is galvanised
mild steel
• Extruded aluminium blades
• Flange or spigot casing options
• Infinite sizing capability
• Unique blade end seal and stop
• Variable blade position for alternate
airflow direction
Specifications
& Tests
• Unless otherwise stated, flange models
are suitable for classes A & B of DW144, with spigot models being suitable for A, B and C of DW144.
• Conforms to HVCA specification DW144 classes A and B, and Eurovent as
relevant.
• Independent performance tests for
pressure drop. Test report 165 refers.
Blade Detail
The nominal 60mm wide standard extruded aluminium blades are fitted onto
6.25mm diameter spindles, complete with blade edge brush seal fitted as
standard.
All
blades are fitted for parallel operation only.
Blades are
linked with a precise linkage, alleviating movement and subsequent rattling
of individual blades. Refer to pressure drop figures for suitability (download brochure).
Avoid use
of dampers in extremely turbulent duct conditions. Although blade linkages
will stabilise blades in most conditions, abnormal circumstances may cause
damper malfunction.