Flexible curtain door Marc-Ok

Description, construction and characteristics of the door

The Marc-Ok fire curtain door consists of the following components: curtain mantle, guides, winding shaft, shaft supports and VIC type drive. The curtain itself consists of three layers of multilayer fabric for an EI60-class door and five for an EI120-class door. The main component of the multilayer mantle fabric is glass fibre reinforced with steel wire. The upper edge of the curtain mantle is fixed to the winding shaft. Along the lower edge of the jacket, there is a gate ballast that allows it to be properly tensioned (no wrinkles and proper winding), which provides additional stiffening. The winding shaft supports are attached to the building envelope. The winding shaft, together with the brackets, is housed in a cover. The shaft cover is made of 0.7 - 1.0 mm thick galvanised steel sheet. The vertical edges of the casing are provided with guides, which are guided in profile guides. The guide in cross-section has

dimension 80 x 120 mm. The guide grille is made of 0.7 mm thick galvanised steel sheet. The guide and cassette fascias can be manufactured from galvanised sheet steel in the three basic colours RAL 7035, 7016, 9002 and 9010. There is the option of a different colour or a stainless steel finish. On request, there is the option of a smoke-tight variant or the connection of a wide range of electrical accessories such as a fire alarm system, door position monitoring or access control. A smaller door, instead of an electric drive and detectors connected to the SAP system, can be equipped with a thermal fusible link release and a safety system which, thanks to the spring cushioning of the retractor, prevents the curtain from falling too rapidly to pose a risk of injury.

Application

Marc-Ok flexible fire curtain doors are designed to separate fire zones in accordance with current fire safety regulations inside and outside buildings and on the routes of transport systems.

Thanks to the low height of the lintel required for installation, the curtain is ideal for building partitions, particularly underground garages and shopping malls, where every centimetre of floor space is important and door dimensions are minimised. For external locations, there is the option of mounting on spacer brackets to compensate for the occurrence of thermal bridging.

Marc-Ok are flexible fire zone closures and, due to their very high fire resistance class, can be successfully used as an alternative to passive fire protection with larger installation conditions. They can also be installed in tandem with a door or roller shutter without fire resistance.

Principles of operation

In the case of electrically driven curtain doors, the curtain is wound onto a shaft and held open by a brake or self-locking drive gear. In the event of a fire danger signal, the curtain is released and moves to the closed position.

Marc-Ok curtain doors with a width and height of no more than 2.5m do not require an electric drive. The door is then actuated by a thermal fusible link trigger, which is released at a temperature of approx. 74 °C and the curtain curtain unfolds closing the fire zone. A torsion spring in the shaft ensures a constant closing speed and the reopening of the door does not require additional components such as cranks. It is possible to manufacture doors with non-standard dimensions and doors with extended technical parameters - after individual consultation.

ADDITIONAL EQUIPMENT

- possibility of making in Sa and S200 smoke-proof class according to PN-EN 13501-2:2016,
- possibility of making in explosion-proof version according to PN-EN, ATEX
- possibility of connecting a wide range of electrical accessories such as fire alarm systems, door position monitoring, access control systems,
- fire alarm control panel with buffer power supply, prepared for cooperation with object fire alarm system and/or local smoke/temperature detectors
- elements of electrical equipment may be available in a set with the fire alarm control panel: elevated control panel, detectors [smoke, temperature, smoke/temperature], signaller [acoustic, optical, optical/acoustic], opening and/or closing detector
- operators with gravitational drop or with manual lifting capability