Intumescent Trunking Pillows – by Envirograf

Envirograf’s Intumescent Trunking Pillows are filled with intumescent sponge, which expands by up to 3 times its original size when hot. This is to seal off gaps within trunking and reduce fire damage.

Suitable for plastic or metal trunking, situated in walls, floors or ceilings. The trunking must house between 30 and 50% cables/wires. If the trunking houses more than this, use Envirograf’s Intumescent Pads instead.

They work by locking together to seal off the fire without having a negative effect on the integrity of the trunking.

They come with a retention tag, which can be attached to provide access.

They are made from non-fibrous dust free material, so that they can be used in sterile environments including hospitals.

These intumescent trunking pillows are flexible, lightweight and fireproof. When installed correctly, they slow down the spread of flame and compartmentalise the trunking.

They should be used when protection against cold smoke is also needed.

Can be removed and replaced, as a permanent solution around cabling which is regularly adjusted.

Trunking pillow sizes:

REF                 TRUNKING                           PILLOW SIZE                                       

TP21                50mm x 25mm                        50mm x 16mm x 100mm

TP22                50mm x 50mm                        50mm x 35mm x 100mm

TP31                75mm x 25mm                        75mm x 16mm x 100mm

TP32                75mm x 50mm                        75mm x 35mm x 100mm

TP33                75mm x 75mm                        75mm x 50mm x 100mm

TP41                100mm x 25mm                      100mm x 16mm x 100mm

TP42                100mm x 50mm                      100mm x 35mm x 100mm

TP43                100mm x 75mm                      100mm x 50mm x 100mm

TP44                100mm x 100mm                    100mm x 70mm x 100mm

TP62                150mm x 50mm                      150mm x 35mm x 100mm

TP63                150mm x 75mm                      150mm x 50mm x 100mm

TP64                150mm x 100mm                    150mm x 70mm x 100mm

TP66                150mm x 150mm                    150mm x 110mm x 100mm

TP84                200mm x 100mm                    200mm x 70mm x 100mm

TP93                225mm x 75mm                      225mm x 50mm x 100mm

TP99                225mm x 225mm                    225mm x 170mm x 100mm

TP126              300mm x 150mm                    300mm x 110mm x 100mm

All have an 100mm length.

Fire testing

Tested to BS476 Part 22 (1987), achieving up to 4 hours integrity.

Tested at VNE to European Standard EN1363-1 (2000). Test terminated at 150 minutes with no product failure recorded.

Trunking pillows provide up to 4 hours integrity, effective in compartmentalising fires before they spread between rooms in a building.

Installation Instructions

Insert tightly against wires and cables, where the trunking passes through walls and floors.

Use the cord and lug to ensure that the pillows are repositioned after they are removed for access to the cables.

Technical data

This product is made from Multigraf Intumescent material, which consists of:

Mineral Wool Fibre: 20-70% by weight

Exfoliating Graphite: 20-60% by weight

Organic Binder (including adhesive coating): 5-30% by weight

Sponge properties:

Physical form/appearance: Solid, voluminous material, more or less elastic.
Colour: Varies according to manufacture.
Specific gravity: 10-600 kg/m³
Solubility in water: Insoluble
Odour: None or mild odour
Flash ignition point: Between 315ºc to 370ºc
Decomposition temperature: Above 180 ºc
Thermal energy: 28 000 KJ/kg
Stability and reactivity: The product is stable at temperatures between
-40 ºc and +12 ºc
Auto-ignition point: Between 370ºc to 427ºc (ASTM D 1929)