Technical description



Intended and registered for use as part of conveyor systems on rails, fire-resistant in accordance with DIN 4102, building code-compliant and subject to quality controls.
Definition:
These fire-resistant seals are self-closing and designed to prevent fire from penetrating openings in walls. They may be programmed:

• to remain open at all times and only to close in the event of a fire
• to remain closed at all times and only to open to allow the
  electromechanical passage of consignments

The seals may only be installed in compliance with the specifications contained in the registration certificate. Careful advance planning is therefore essential. The following requirements must be met:

• Walls made of masonry DIN 1053, class 12, mortar group II, > 240 mm thick, concrete DIN 1045, class B15, > 140 mm thick (also made of foam mortar or precision blocks DIN 4165, strength class > PB4/PP4, 240 mm thick or of reinforced horizontal or upright foam mortar slabs DIN 4165, strength class > P 4.4, 175 mm thick).
• Conveyor belt interruption in the vicinity of the flaps.
• The design of the conveyor belt must ensure that modifications are not necessary
  in the area of the tracks and guides (labyrinth seals).
• Seals must always be equipped with approved hold-open systems.
• Suitable measures must be in place to ensure that any goods are removed or kept clear of the opening area of the seals if the smoke detector activates. The closing process of the seals must not be hindered by goods on the conveyor belt and the closed flaps must not be damaged by goods on the conveyor belt.
• The control of the conveyor system in the area of the fire-resistant seal must ensure that new goods can only access the area of the seal when the area itself and the storage area behind the seal are clear. The conveyor system must be monitored in this so-called safety zone.

A signal must be sent to the conveyor system if the smoke detection system is activated by fire/smoke or manually. Subsequently, procedures must be in place to prevent any new goods accessing the seal area. Any goods still in the area of the seals must be immediately removed – powered by an independent power supply (emergency power system). The conveyor system must transmit a clearance signal to activate the flap closing process.
An additional signal from the system must ensure that the conveyor system does not re-start until the flap is open.
  

Electromechanical operation

• is necessary for flaps that are programmed to remain closed and only to open when consignments pass through.
• is recommended as a additional feature on flaps that are programmed to remain open with restricted accessibility, to avoid draughts, and for soundproofing reasons to avoid noise, etc. Seals without drives must be opened manually after each closing action.
         

Special tests (to be arranged by the operator):
Fire-resistant seals for conveyor systems on rails can only prevent fire penetration if they are fully functional at all times. The operator must arrange for the seals to be inspected once they have been installed and at regular intervals to ensure this functionality.
       
Acceptance test:
Once the seal has been installed at its intended location and is ready for use, it must be tested for full functional reliability in connection with the hold-open system and the conveyor system by an expert from the German Association of Property Insurers (Verband der Sachversicherer e.V.) in Cologne. A record must be made of the acceptance test, which must be forwarded to the construction supervisory authority for its files.
     
Periodic inspection of the system:
The operator must inspect each seal at least once a month to ensure that it is fit for purpose. In addition, the operator must perform or arrange for an annual inspection to ensure the full functioning of the seal in connection with the conveyor system and the hold-open system. These inspections may only be performed by a recognized expert or individual who has been specially trained for this purpose. The findings must be documented in an inspection log.
        
Note:
T90 fire-resistant lifting and sliding flaps may also be used in areas without conveyor systems on rails. A hold-open system is then not necessary but can be installed on request. If hold-open systems are installed on these seals, the same conditions apply as for fire-resistant sliding doors.