| STANDARD SPECIFICATION Curtain/Bottom
Rail
Specially reinforced and coated grey fibre-glass material
approximately 0.7mm thick and weighing 650 gms per m2 which
withstands temperatures of more than 1000 degrees C. The
curtain is looped at both ends to fit around a mobile rod
within the side guide to avoid deflection. The material is
attached to the roller at the top and to a steel bottom rail
which is formed to create a slim-line soffit with no visible
fixings when in the raised position.
Guides
The side guides are roll-formed
from galvanised steel and prepared for fixing to the opening
structure by non-visible
bolts. The guide incorporates a unique retaining rod to ensure
the curtain is always engaged in the guides and has been
reduced in size to 105mm x 74mm.
Casing
The casing is manufactured from
galvanised steel and is available in three different sizes
dependant upon opening
height. It may be soffit or face fixed to the structure either
directly or by means of drop rods allowing services to be
routed above.
Roller
The roller is manufactured from
mild steel tube of sufficient diameter and wall thickness
to resist deflection and is mounted
in bearings on each end plate.
Operation
The curtains are electrically operated as standard
using a range of 240 volt single phase Speedsafe motors which
incorporate
an electro-magnetic brake, adjustable limit switches and
a built-in control panel.
The design incorporates a gravity failsafe
system and dual activation devices as standard with normal
activation in
fire conditions via an auto re-set solenoid which, on receipt
of a 24 volt DC fire signal, releases the motor brake and
allows gravity closure with a controlled descent.
As a back-up device, a fusible link
is also incorporated into the system which closes the curtain
when localised heat
reaches 68 degrees C. In all instances, closure is effected
with a controlled descent.
The standard system is pre-wired in
our factory to avoid the costs of site electricians and merely
requires a 13amp
three-pin socket within one metre of the motor position.
Each shutter is individually operated
from a low-level surface mounted key-switch.
Finish
The guides, bottom rail and casing are supplied galvanised
as standard. They are also available in stainless steel and
polyester powder coated in a range of standard RAL colours
at extra cost.
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