Intumescent Fire Grilles
Intumescent ventilation fire grilles consisting of two metal plates that hold intumescent material fitted on either side of a door or wall. The grille has ventilation slots to allow improved airflow quality. The intumescent material placed within the grille will expand in under a minute to seal the openings, preventing fire and smoke from spreading. See also MG intumescent grilles. Available in a wide range of different sizes and finishes.
The grilles are suitable for operational theatres, sterile areas, and food preparation spaces, providing effective passive fire protection. An option to include a thermal breaker is available. Once the grille reaches 70oC the link breaks and the inner intumescent plate drops, sealing the grille. Fires will become compartmentalized to prevent the spread of smoke and flames, preserving building structures and allowing safe time for occupants to evacuate.
Tested to BS476 Parts 20 and 22 (1987), achieving 66 minutes on one side only; and BS476 Part 22 (1987) achieving integrity of 73 minutes. Also tested to EN1363-1 (2000).
Specially designed passive fire range to meet Document B of Building Regulations, and also tested to European Standards. For more information, browse our full range of ventilation products online.
ADVANTAGES
– Utilised either side of a ventilation opening in fire rated doors and walls, providing up to 73 minutes integrity- Available in two forms to suit situations where only one or both sides of the wall or door are at risk
APPLICATION INSTRUCTIONS
The sets are defined in two ways: the /D version is for use in situations in which the risk is double-sided (that is, the opening could be attacked by fire from either side); and the /S version is for use in situations in which it has been clearly identified that only a single side of the opening is at risk. When fitting the /S version, the intumesced plate is placed on the risk side and the plain plate is placed on the opposite side of the opening. Order the grilles to suit the opening to be protected – the external measurement of the grille needs to be at least 50mm larger than the opening to allow for fixing. Special sizes can be produced (prices quoted on request). See price list for full range of available sizes.
ORDER REFERENCES / SIZES
MG slotted type for more ventilation/MGL louvred non-viewing type. Each slot gives 6cm² and louvre 3.2 cm² free ventilation area.
REF EXT SIZE HOLE SIZE NO. OF
(H x W) (H x W) OPENINGS
SINGLE
MG1/S 150 x 200 100 x 150 010
MG2/S 200 x 200 150 x 150 014
MG3/S 275 x 200 225 x 150 022
MG3A/S 200 x 275 150 x 225 024
MG4/S 275 x 275 225 x 225 030
MG4A/S 300 x 300 250 x 250 033
MG5/S 350 x 350 300 x 300 052
MG6/S 350 x 425 300 x 375 075
MG8/S 425 x 425 375 x 375 090
MG8A/S 350 x 500 300 x 450 084
MG9/S 500 x 500 450 x 450 126
MG11/S 550 x 550 500 x 500 132
