Highlights

  • Test Standards: BS476 Part 22 1987. Clause 8, BS 7346 Part 3 1990, BS EN 1634-1, 1634-3, UL 10 D & DS, BS EN 8524 underway
  • Fire Resistance: Up to 4 hours
  • Fire Insulation: N/A
  • Operation: Motorized
  • Min. Box Size: 180mm (d) x 180mm (h) - motor is within the box
  • Max. CurtainSize: Contact us
  • Activation: Fire Alarm Signal
  • Finishes: Steel components are powder-coated, fabric color is grey.

CONSTRUCTION AND OPERATION

Basic Components

1) Roller - The fire curtain fabric is wound onto the roller which remains completely enclosed by the head box.

2) Headbox - The rollers and motors come fully enclosed in a small head box profile (made from 1.2mm thick steel) starting from 180mm x 180mm, making them compact and convenient.

3) Fabric - Weighing approx. 660g/m2, this woven glass fibre cloth is reinforced with stainless steel and has excellent fire resistance and low irradiation of heat.

4) Bottom bar - Mild steel angles suitably designed to form a complete seal.

5) Side guide - With a slim 50mm x 100mm profile, this side guide can be well hidden.

Normal Storage

Under normal conditions, the curtain remains retracted in the compact head box installed above the false ceiling. It is held in place by an extra low voltage supply with the bottom bar resting against the underside of the headbox or below the box depending on the application.

Curtain Activation

1) Via the fire alarm signal
2) Via other detection systems like heat / smoke detectors
3) During a power outage (a back up battery will hold the curtain in position for 60 minutes before it descends)
4) Turning the test key switch for regular safety testing

Curtain Descent

The group control panel (GCP) removes the power supply to the motor control circuit (MCC) and the extra low voltage to the motor is suspended. Since the brake has been released, the weight of the bottom bar pulls the curtain down to its operational position. When the signal is reset, the GCP restores power to the MCC which retracts the curtain up and back to its normal position.

True Gravity Fail Safe

Our Gravity Fail Safe ensures that under any scenario, the curtain will descend by gravity. The curtain does not fall like a guillotine but descends at a controlled and constant. This is because the voltage generated by the rotating motor feeds the electronic speed monitoring system which ensures that the speed is within safe limits as set by International Standards.


Scenarios where fire curtains are used

Fire compartmentalization

To serve as a barrier for fire compartmentalization, the installed product needs to have fire resistance/ integrity for the specified time and reduce the irradiation of heat (transfer of heat through the material). Our fire curtains provide the highest levels of protection and is beneficial over traditional fire shutter use owing to 70% lower heat radiation and compact enclosed construction.

Protecting routes of escape

When considering the placement and provision of a protected means of escape, fire and smoke are paramount factors that need to be addressed. However, a permanent brick wall or fire rated partition might not suit the building design and traditional fire shutters might be too bulky. Our fire curtains with their compact headbox size and 70% less radiation that steel shutters are ideal solutions when it comes to creating an automatic barrier between zones with reduced temperature and prevention of smoke egress.

In front of elevator doors

Elevator shafts are a permanent compartment breach with the potential to spread flames and smoke vertically through a building very rapidly. Our smoke and fire curtains can be designed as a certified and recognized ‘smoke seal’ that can be discreetly installed in front of elevator doors, thus rendering the curtain invisible when retracted. Once deployed it permits a greatly reduced level of smoke leakage falling within International Standard requirements.

External routes of escape 

Where buildings make use of external staircases running down a building to allow escape from each floor, a fire on the lower floors can compromise this route of escape. A curtain with an IP rating can be installed along weak points of the escape route providing protection to the stairs from smoke, irradiance of heat and high temperatures and naked flames.


Single Barrel AssemblY (up to 6m width)

For widths up to 6m, we can use a single barrel assembly. This self-limitation to 6m is based on decades of experience, which provides ease of operation and maintenance. Larger widths can be achieved using multiple barrel assembles below.

MULTIPLE BARREL ASSEMBLY (longer than 6m width)

We can achieve unlimited widths by overlapping the curtains via a multiple barrel assembly. No intermediate posts are needed. The overlapped curtains descend together and shared a conjoined bottom bar.


Overview

The Automatic Fire Curtain consists of fire resistant fabric curtain with stainless steel reinforced for impact resistance and is mounted on a steel roller and powered by an internal, electric, tubular geared motor. All working parts are totally enclosed and protected within the steel roller. The complete system is tested for true fire resistance, and controlled gravity fail-safe on total power failure which is not reliant on secondary power supply.

Certifications & Documentation

Ferco’s Fire Curtain has full testing and certification to BS476 Part 22 1987. Clause 8, BS 7346 Part 3 1990, BS EN 1634-1, 1634-3, UL 10 D & DS.

Fabric

Woven with glass fibers with reinforced stainless steel wires with a silver polyurethane; tested as part of the complete assembly with OVERLAPPED  and CONJOINED curtains in the orientation. The fabric achieves 270 minute fire resistance at 1000 C according to the time temperature curve of BS476 Part 20 1987, and weighs about 660 grams / m2.

Fabric meets the requirements for Fire Propagation of BS476 Part 6 1989 and has Nil spread of Flame, achieving Class 1 according to BS476 part 7 1987.

Operation

Under normal conditions the curtain is retracted in the head box and is held in position by an extra low voltage supply from the semi conductor regulator in the motor control circuit (MCC). The bottom bar will be resting against the underside of the box or below the box if a stopping bar is installed, the stopping bar will then rest against the box. In the event of a fire condition or operation of the test key switch, the group control panel removes the power to the MCC’s and the extra low voltage supply to the motor is isolated. The curtain descends by using the weight of the bottom bar to rotate the tube and deploy the fabric at a controlled rate.

The Fire Curtain operates with mains power and is also operable with emergency power source. If both mains and emergency power fail, the system will descend, under gravity with a controlled rate of descent after a time delay of 60 minutes, as a safety feature to avoid dangerous guillotine/fall descent. The system is operated by alarm / control signal and / or specified fail-safe functions

Construction

The steel roller, complete with internal tubular motor, curtain, bottom bar and all associated fittings, is fully enclosed within a 1.2mm galvanized mild steel box. Motor contains the gearbox, braking system and drive mechanism. Curtains are contained within 1.2mm galvanized mild steel boxes whose end plates are brackets are made of minimum 2mm galvanized mild steel.

Multiple units will have rollers overlapping (600mm) one over the other. The fabric on the upper roller will descend immediately adjacent to the fabric on the lower roller, and both fabrics would be linked with a conjoined bottom bar. All operating speeds are fully adjustable to ensure synchronization of units with conjoined bottom bar.

The bottom bar consists of two L shaped mild steel angles forming a T-section.

M&E Requirements

Power

230V, single phase, 50Hz, 13A power supply 

Fire Alarm Signal

24V DC, 400mA, normally closed fire alarm signal.

Options

  1. Audio / visual alarms
  2. Monitoring the fire curtain through a BMS system or remotely with dedicated monitors.
  3. Powder-coated bottom bar and guide rails.
  4. Emergency Retract Buttons
  5. Oversize certification
  6. Fire alarm override facility

Controls

Ferco’s Fire Curtain operates through Group Control Panel (GCP) located adjacent to the units with the Main Fire Alarm Panel (MFAP), Motor Control Panel/s (MCP) located adjacent to motors, have appropriate access panels. The system is fully protected and failsafe to avoid fire rated cabling. In case of temporary power interruption, curtain will be in raised position for a time duration of 60 minutes, after which the curtain will descend if power is not returned. GCP has audio and visual power failure warning system as an optional which is operable with both mains and emergency power. Optional facility is available for partial descent to predetermined position – delay- followed by full descent (applicable for full power failure).