PRDF(G)
Fire Suppression Damper
Typical Application
Ordering
General Building Service Fire Suppression Systems
Quantities, surface finish and other special require-
where pressure relief is required by non-fire rated
ments to be stated separately.
dampers providing a rudimentary level of control.
The following design features have been included:
Duct Height 300H
Type PRDFS(G)
For use in horizontal ducts or walls only
Duct Width 500W
Material 316L
Frame of welded construction
Low noise generation
Case Depth 200D
Case Thickness 2.0
Low airflow resistance
Type Wozair:
Pressure Relief Fire
Excellent corrosion resistance
Suppression Damper
Description
Case Material:
Stainless Steel
1.4301
= 304
(SS304)
Low Carbon
1.4307
(SS304L) = 304L
Casing
Low Carbon
1.4404
(SS316L) = 316L
The damper frame is formed from stainless or gal-
Mild Steel Sheet
vanised sheet steel 2mm thick into rigid angle sec-
Pre-Galvanised
FeP02 nac = GSS
tions that are welded and riveted together. Stainless
steel or galvanised mild steel 2mm thick angle blade
Case Thickness: 2.0mm
stops are provided at the top and bottom in order to
achieve an effective seal between the casing and
Nominal
Clear inside duct dimensions
the blades.
Duct Size:
`Quote' (Width x Height)
Blades
Order Code Example:
PRDFS(G)/316L/2.0/300H/500W/200D
Single skin stainless steel or galvanised mild steel
(2.0mm thick) are riveted to continuous tubular spin-
dles. The spindles rotate in Igus moulded bearings.
The blades are individually mounted in the frame
and are free to independently move to relieve room
pressure. The damper free area is a function of size
that is typically 50% of the area of the duct.
At normal room pressure the blades are designed to
hang in the fully closed position to prevent any backflow
of air into the room or operating
area, on discharge of the inert gas
fire extinguishant the blades open to
200
relieve pressure preventing damage
to the fabric of the building, until the
blades close to retain the extinguis-
hant and provide for fire suppres-
sion. It should be noted that no pro-
vision is available for the effect of
pressurisation to the back face of
the damper, which would be a con-
sideration for instance should the
unit be installed into an exterior wall
with exposure to wind etc. However
additional cowls or louvres can be
supplied to minimise these effects.
Options
Oilite bearings
Cover grilles (aluminium or stain-
less steel)
Front Elevation
Side Elevation
External weather louvres
Client specific requirements