Description
Slotted Intumescent Grille
Intumescent ventilation grilles consisting of two metal plates that hold intumescent material fitted on either side of a door or wall. 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.
- 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 MGL intumescent grilles.
- Available in a wide range of different sizes and finishes.
- An option to include a thermal breaker is available.
Our intumescent ventilation grilles are suitable for operating theatres, sterile areas, and food preparation spaces, providing effective passive fire protection.
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.
| External Size (H x W) mm | Hole size (H x W) mm | No. of openings | Order ref SINGLE | Order ref DOUBLE | Order ref PLAIN PLATE |
| 150 x 200 | 100 x 150 | 10 | MG1/S | MG1/D | MGP1 |
| 200 x 200 | 150 x 150 | 14 | MG2/S | MG2/D | MGP2 |
| 275 x 200 | 225 x 150 | 22 | MG3/S | MG3/D | MGP3 |
| 200 x 275 | 150 x 225 | 24 | MG3A/S | MG3A/D | MGP3A |
| 275 x 275 | 225 x 225 | 30 | MG4/S | MG4/D | MGP4 |
| 300 x 300 | 250 x 250 | 33 | MG4A/S | MG4A/D | MGP4A |
| 350 x 350 | 300 x 300 | 52 | MG5/S | MG5/D | MGP5 |
| 350 x 425 | 300 x 375 | 75 | MG6/S | MG6/S | MGP6 |
| 425 x 425 | 375 x 375 | 90 | MG8/S | MG8/S | MGP8 |
| 350 x 500 | 300 x 450 | 84 | MG8A/S | MG8A/D | MGP8A |
| 500 x 500 | 450 x 450 | 126 | MG9/S | MG9/D | MGP9 |
| 550 x 550 | 500 x 500 | 132 | MG11/S | MG11/D | MGP11 |
THE FOLLOWING ITEMS ARE AVAILABLE WHILE STOCKS LAST:–
MG7/SÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 425 x 350Â Â Â Â Â Â Â Â Â Â Â Â Â 375 x 300Â Â Â Â Â Â Â Â Â Â Â Â Â 068
MG7/DÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 425 x 350 Â Â Â Â Â Â Â Â Â Â Â Â 375 x 300Â Â Â Â Â Â Â Â Â Â Â Â Â 068
MGP7Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 425 x 350Â Â Â Â Â Â Â Â Â Â Â Â Â 375 x 300Â Â Â Â Â Â Â Â Â Â Â Â Â 068
MG9A/SÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 250 x 550Â Â Â Â Â Â Â Â Â Â Â Â Â 200 x 500Â Â Â Â Â Â Â Â Â Â Â Â Â 060
MG9A/DÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 250 x 550Â Â Â Â Â Â Â Â Â Â Â Â Â 200 x 500Â Â Â Â Â Â Â Â Â Â Â Â Â 060
MGP9AÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 250 x 550Â Â Â Â Â Â Â Â Â Â Â Â Â 200 x 500Â Â Â Â Â Â Â Â Â Â Â Â Â 060
MG10/SÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 650 x 650Â Â Â Â Â Â Â Â Â Â Â Â Â 600 x 600Â Â Â Â Â Â Â Â Â Â Â Â Â 216
MG10/DÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 650 x 650Â Â Â Â Â Â Â Â Â Â Â Â Â 600 x 600Â Â Â Â Â Â Â Â Â Â Â Â Â 216
MGP10Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 650 x 650Â Â Â Â Â Â Â Â Â Â Â Â Â 600 x 600Â Â Â Â Â Â Â Â Â Â Â Â Â 216
MG10A/SÂ Â Â Â Â Â Â Â Â Â Â Â Â Â 350 x 650Â Â Â Â Â Â Â Â Â Â Â Â Â 300 x 600Â Â Â Â Â Â Â Â Â Â Â Â Â 112
MG10A/DÂ Â Â Â Â Â Â Â Â Â Â Â Â 350 x 650Â Â Â Â Â Â Â Â Â Â Â Â Â 300 x 600Â Â Â Â Â Â Â Â Â Â Â Â Â 112
MGP10AÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â 350 x 650Â Â Â Â Â Â Â Â Â Â Â Â Â 300 x 600Â Â Â Â Â Â Â Â Â Â Â Â Â 112
Grilles MUST be fitted in the orientation shown e.g. height = vertical / width = horizontal measurements
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Please note: special colours must be quoted and stock checked
![35-mg-600×450 [darkened]](https://envirograf.com/wp-content/uploads/2015/09/35-mg-600x450-darkened.jpg "35-mg-600×450 [darkened]")
