Automatic Smoke Curtains
The Elite Automatic Smoke Curtain is an electrically operated automatic smoke barrier, to be used to form a continuous barrier against smoke produced in a fire.
The Elite Smoke Curtain (ESD60 & ESD240) – Automatic Smoke Curtains
BS 7346: Part 3: 1990
BS 476: Part 6: 1989
BS 476: Part 22: 1987
UL 10 C
BS EN 1634 – 1:2000
BS EN 13501-2: 2007 classified E60
Complete product tested to (BS) EN12101-1:2005 and BS7346: Part 3, and achieved a rating of DA (600°C, above 120 minutes) and is ASB 1 and 3 classified.
Designed to operate for 2000 cycles at normal ambient temperatures in the range of 0°C to 60°C and to withstand hot air and smoke at temperatures up to 600°C for over 120 minutes once only. The fabric has a class 1 surface spread of flame when tested to BS 476: Part 7 and a fire propagation index I =1.4 when tested to BS 476: Part 6. It is therefore rated Class 0 to the UK Building Regulations Approved Document B 1991.
The curtain head box is manufactured from 1.2 mm galvanised steel, the enclosure is rated at the same temperature as the curtain fabric. Removable cover plates are incorporated to allow access to the curtain rollers. Standard head box sizes are 150mm x 150mm for single rollers (maximum width 5.5m) and 250mm x 150mm for multiple rollers (over 5.5m wide). Larger head boxes may be required where the curtain drop is in excess of 3 m. A suitably weighted bottom bar is provided to prevent deflection and ensure correct operation under gravity. A polycarbonate extrusion is supplied as standard, this locates into the profile formed in the bottom of the box. The roller is constructed from an octagonal tube, each of which incorporates a 24volt d.c. motor & gearbox and a sealed heavy duty ball bearing assembly. A motor control circuit housed in a steel enclosure is mounted onto the motor end of the head box. The fabric curtain is manufactured from X32K woven glass fibre cloth incorporating a “Panama” weave for increased stability.
The fabric has a nominal weight of 540g/m² and is tested to withstand temperatures of up to 1000°C for a period of 60 minutes. The curtain fabric has a “Panama” weave which offers a more even surface and allows a tighter interlacing of the fabric edges. The tensile strength of Panama weave fabric is 10% greater than other fabrics due to the constant thread tension. The extra strength helps the curtain to keep it’s shape whilst retracting onto the roller.
The system must be proven to fail safe to the operational position on total loss of primary and auxiliary power. Under normal operating conditions the curtains would be held in the retracted position via the motors operating at low voltage. The manufacturer must be able to confirm that the motor windings used are suitable for this type of operation. Upon activation of the fire alarm the control panel will remove the supply voltage and the curtain will descend under the power of gravity in a controlled manner.
Split drop delay:
An optional braking system is available to allow a two stage descent during gravity deployment. Partial descent to a predetermined level to permit preliminary escape and initial smoke containment, after delay the barrier descends to full operational position.
Audio or spoken multi message facility.
Beam protection and obstruction warning:
A beam detector, with delay timer which will sound in the event of any obstruction being placed in the barrier drop line.
Visual alert system:
Standard localized light or strobe light.
Hold on retract facility for multi escape and emergency service access.
Walk through escape:
Passage through the barrier.
Monitoring relays can be installed in the group control panel to provide BMS contacts for mains failure and curtain zone deployment. Monitoring relays can be installed in the motor control circuits to provide BMS contacts for individual curtain deployment.
All equipment will be manufactured and pre-assembled to approved drawings.