Applications and approval
As part of belt operated conveyor systems, fireproof as per DIN 4102, building code approved and quality controlled.
Term:
These fire seals are self closing and designed to prevent fire penetrating through wall openings.
They may be used:
- as seals that are designed to stay open at all times and only to close in the event of fire
- as seals that are designed to stay closed at all times and only to open electrically to let goods pass through
Installation of these seals must comply with the approval certification. Careful preliminary planning is therefore crucial.
Requirements that must be met include the following:
- Masonry walls as per DIN 1053, class 12, mortar group II, ≥ 240 mm thick, concrete as per DIN 1045, class B15, ≥ 140 mm thick, foam mortar blocks or precision blocks as per DIN 4165, strength class ≥ PB4/PP4, 240 mm thick or reinforced horizontal or vertical foam mortar slabs as per DIN 4165, strength class ≥ P 4.4, 175 mm thick.
- Conveyor belt cutout near the flaps.
- Engineering design of the conveyor belt must ensure that changes to the tracks and guides (labyrinth seals) are not needed.
- All seals must be fitted with approved hold open systems.
- Suitable measures must ensure that – when the smoke detectors are triggered – the open area of the seals is cleared or kept clear of moving goods. The seal closing procedure must not be hindered by goods and the closed seals must not be damaged by moving goods.
- The control of the conveyor system must ensure that new goods can only be moved towards the fire seal once the area itself and the storage area behind the seal are free. This so-called safety distance necessitates a solution for monitoring the conveyor system.
- A signal must be transmitted to the conveyor system when the smoke switch system is activated by smoke/fire or triggered manually. This must ensure that no new goods can move into the seal area. Any goods on the belt must be cleared immediately from the seal area – by emergency generator. Closure of the seal is triggered by the conveyor system signalling that all is clear. A further signal from the system must ensure that further conveyance is only possible when the seal is open.