Greenheck HBS-330 User Manual
®
HBS-330 & HBS-331
Application and Design
Models HBS-330 and HBS-331 are heavy duty double flanged
channel frame style dampers with double thickness fabricated
airfoil blades. They are designed to protect against blasts and rapid
pressure changes. Qualified to pressures as high as 5.77 psi covers
many applications in Unified Facilities Criteria (UFC) and General
Services Administration (GSA) codes and standards, including
Charge Weight IIat 82 ft.
Code Blast Loading
GSA- Level C 4 psi @ 28 psi-msec
UFC 4-010-01 (charge
weight I at 148 ft)
UFC 4-010-01 (charge
weight II at 82 ft)
1. Charge weight I = large mass explosion as would be found in a vehicle bomb specific explosive weights are for US Government "For official use only" clearance
personnel.
2. Charge weight II = medium size mass explosions as would be found in a
briefcase or backpack bomb - specifice weights are for US Government "For
offical use only" clearance personnel.
4.76 psi @ 41.1 psi-msec
5.77 psi @ 29.69 psi-msec
Heavy Blast Suppressor
HBS-330
Flow
Blast
*
*
* Actual Inside Dimension.
** The W dimension is ALWAYS parallel with the damper
blade length.
Ratings
Pressure: 5.77 psi (160 in wg) (40 kPa) blast load
Velocity: 500 - 6400 fpm (2.5 - 32.5 m/s)
Temperature: Minimum: -40°F (-40°C)
Maximum: 250°F (121°C)
Size Limitations
Size Limitations
W x H Minimum Size
Single Section Two Sections*
Inches 6 x 6 36 x 96 77 x 96
mm 152 x 152 914 x 2438 1956 x 2438
* Includes 5 in. (127mm) vertical mullion with removable
cover plate
Maximum Size
HBS-331
Blast
*
Flow
*
Options Available:
• Bolt holes in flanges
Note: Spring Location is from the perspective of
viewing the damper in the blast direction.
See installation instructions at www.greenheck.com for installation options and special sizing considerations.
5D 6D
5D
D
4 (W) (H
)
3.14
Standard Construction
Construction Standard Optional
Frame Material Galvanized steel 304SS/316SS
Frame Material
Thickness
Frame Type 10 in. x 2 in. (254mm x 51mm) channel -
Blade Material Galvanized steel 304SS, 316SS, Galvaneal
Blade Type Airfoil -
Blade Thickness 16 ga. (1.6mm) -
Axle Diameter 3/4 in. (19mm) -
Axle Material Plated steel 303SS/316SS
Bearings Externally mounted relubricable ball -
Blade Seal None EPDM, Silicone
Linkage Material Galvanized steel 304SS/316SS
Flange 2 in. (51mm) -
Springs 301SS -
Finish Mill Finish Hi Pro Polyester, Epoxy,
Normal Airflow Horizontal Vertical Up or Vertical
HBS-330 & HBS-331
10 ga. (3.5mm) -
Industrial Epoxy
Down
Performance Data
Pressure Drop Data
This pressure drop data was conducted in accordance with AMCA Standard 500 using the three configurations shown. All data
has been corrected to represent standard air at a density of 0.075 lb/ft3 (1.2 kg/m3) .
Actual pressure drop found in any HVAC system is a combination of many factors. This pressure drop information along with an
analysis of other system influences should be used to estimate actual pressure losses for a damper installed in a given HVAC
system.
AMCA Test Figures
Figure 5.3 Illustrates a fully ducted damper. This
configuration has the lowest pressure drop of the
three test configurations because entrance and exit
losses are minimized by straight duct runs upstream
and downstream of the damper.
Figure 5.2 Illustrates a ducted damper exhausting
air into an open area. This configuration has a lower
pressure drop than Figure 5.5 because the entrance
losses are minimized by a straight duct run upstream
of the damper.
Figure 5.5 Illustrates a plenum mounted damper.
This configuration has the highest pressure drop
because of the high entrance and exit losses due to
the sudden changes of area in the system.
Leakage Data
Leakage testing was conducted in accordance with
AMCA Standard 500 and is expressed as cfm/ft2 of
damper face area. All data has been corrected to
represent standard air at a density of 0.075 lb/ft3 (1.2
kg/m3).
Fig. 5.3
Fig. 5.2
Fig. 5.5
AMCA Test Figures
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