FireStopSystems International Ltd.Spelleweg 3

NL-7475 GV Markelo

Tel: +31 (0)547-363519Fax: +31 (0)547-361465

E-mail: info@fssinternational.nlWebsite: www.fssinternational.nl

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BrochureIntumescent Air transfer grilles

Fire protection

1. LVV402. LVH443. LVH504. LVH545. LVV40-S / LVH44-S6. LVH44-G

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Fire resistant walls and floors in a building play an important part in containing the spread of fire and smoke. However, a building alsoneeds to be well ventilated for the health and comfort of itsoccupants. Systems of natural and mechanical ventilation oftenrequire ducting to pass through fire resistant walls and floors, and this can compromise the fire containment in the building.The FSS Lorient solution is to fit intumescent air transfer grilles at the point where the fire resistant wall or floor is breached. Undernormal circumstances these grilles allow air to pass freely throughthe building. However, in the event of fire the slats and frame swellto many times their original thickness, fusing together to form a non-combustible mass which provides fire resistance to match the surrounding construction, and prevents the passage of hot smokeand gases. When combined with automatic smoke control systems, Lorient'sintumescent air transfer grilles will also provide protection againstcold smoke. These electrically powered dampers/shutters are connected to a standard smoke or fire alarm/detection system which, when triggered, causes the dampers/shutters to close thereby preventing the passage of cold smoke. Under normalcircumstances the dampers/shutters remain open allowing the free passage of air.

Fire protection

Type: LVV40

GeneralThis product's compact form allows for installation in apertures where other types of damper can not be fitted or accessed after installation. Requiring no commissioning or operation function checks. These products provide confidence with economy. Available in sizes from 98mm square to 598mm square and many height to width ratios in 25mm increments.

Fire resistance up to 120 minutes. Tested against EN 1634-1

Specifications

Materials:Intumescent material used in the slat construction is based upon sodium silicate and provides the lowest activation temperature of any intumescent material at 100 degrees C. It is encapsulated in PVC extrusions with cross section dimensions of 40mm x 6mm and they are assembled in the form of a matrix.Mortised jointing of the damper slats to the intumescent outer components eliminates the need for any metal components around the periphery.Each size of damper is manufactured 2mm less than the corresponding aperture size to provide clearance during installation. e.g. a 198mm x 198 mm damper is suitable for a 200mm x 200mm aperture.

The complete assembly is a robust and easily installed product that is easy to clean using a vacuum cleaner or brush.Care is taken during manufacture to seal the material from the effects of moisture, since sodium silicate is by nature hydroscopic. However, in application where high levels of humidity or wetness are anticipated, it is recommended that LVH44 products should be used.

Orientation:LVV 40 products should be used in a vertical orientation as illustrated.

Fire protection

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Fire protection

Type: LVH44

General This all-purpose damper can be relied upon to function in extremes of climate and environment.It can suffer considerable abuse during and after installation without losing effectiveness in the control of fire and hot gases. Contaminants do not readily adhere to it and therefore an efficient airflow can be expected throughout its working life.The LVH44 range dampers can be assembled in multi-modules in order to protect large apertures.

Fire resistance upto 120 minutes. Tested against EN 1634-1

Specifications

Materials:The composite intumescent material selected for the LVH44 range consists of graphite particles that are contained in a carrier that is impervious to the effects of water. The material when activated by heat produces a very durable barrier to the spread of fire and hot gases, whilst providing good insulation performance.Intumescent slats are formed by wrapping intumescent material in metal foil, creating a 4mm thick section. Steel channels, 5.5mm wide, support the outer edges of the slat and are themselves located into notches in both the front and back steel frames. The two piece outer frame is arranged to give a thermal break between the front and back and is made from 1.00mm. galvanised mild steel.Each damper size is manufactured 2mm less than a nominal aperture size to provide clearance when installed in an aperture of the same nominal dimensions. e.g. a 198mm x 198mm nominal size damper will suit a 200mm x 200mm aperture.The complete assembly is a rugged damper that is easy to install and will require minimal, if any, post installation attention.

Orientation:LVH44 dampers can be installed in any orientation.

Standard sizes available (mm):

All sizes from 68 x 68 mm upto 1.200 x 2.400 mm! Thickness 44 mm

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Fire protection

Type: LVH54

Part of Lorient’s LVH range of highperformance intumescent dampers, the LVH54has been specifically developed to meet thetough requirements of ISO 10294 Part 5.

During the ISO 10294-5 test, the LVH54 wassuccessfully proven to:

form a complete seal within 2 minuteswithstand a 300Pa pressure differential acrossthe dampermaintain its fire integrity for a period of four hours

In everyday service the LVH54 offers excellent airflowcharacteristics (approx 60% free area), is resistant toclogging, and has no moving parts – so it providesconsistent performance, and requires virtually nomaintenance.

SpecificationsManufactured using a zintec steel frame and stainlesssteel slat covering – ideal for use in harsh ductenvironments, including high humidity applications.Graphite-based intumescent material.Width & height: 100mm to 600mm (nominal) in50mm increments. Custom sizes also available.Depth: 54mm.

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Fire protection

Type: LVV40-S / LVH44-S

GeneralThe LVV40S and the LVH44S damper types are designed to be linked with smoke sensors via a fire alarm panel and therefore provide excellent cold and hot smoke containment. The combination of intumescent and electro-mechanical technologies allows proven fire resistance with very good insulation properties. Remarkably little current is used by the servo motor when opening or closing the smoke shutter module and none is drawn when the shutter plates are either closed or open. The units can be supplied to suit a wide range of wall thickness and aperture sizes. Pressed steel cover grilles can be supplied in a range of colours to enhance the appearance of these reliable products.

Fire resistance upto 120 minutes. Tested against EN 1634-1

Specifications

Materials:The damper casing is manufactured from high grade mineral board and is supplied complete with the fire damper and smoke shutter module assembled into it. The LVV40 damper that provides 60 minutes fire resistance and the LVH44 damper that gives 120 minutes fire resistance are described elsewhere in this publication. Information on the smoke shutter module and damper control system can also to be found elsewhere in this catalogue.

Orientation:These products are designed to be installed in a vertical orientation as shown above. Any departure from this arrangement must be authorised by the Lorient Technical Department.

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Fire protection

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Type: LVH44-G

Fire resistant window ventilation grille (EW 30 minutes)

• This fire resistant window ventilation grille was developed specifically for use directly on fire resistant glass in facades. • Under normal conditions, air passes freely through the grille (at a volume of up to 13 litres per second at 1 Pa pressure differential). However, when subjected to heat the intumescent core will expand and prevent the passage of fire and hot gases during a fire.• The outside of the grille has horizontal ‘louvred’ slats to prevent water ingress • On the inside there is a rotary control to allow the air flow to be increased or reduced as required. • The perimeter of the grille has a thermal break to minimise heat transfer. • The grille is fitted in the same way as a normal glazing ventilation grille. • The intumescent core of the grille (Intumescent damper reference LVH44) is tested against British and European standards

Because materials in a construction can affect each other in a negative way during fire conditions, it is necessary to test a complete construction.The LVH44-G fire resistant window ventilation grille has been successfully tested as a complete glazed assembly by Warrington Fire Gent, against the European standard EN 1364-1. The tested structure was built up as a meranti timber frame of approx. 1000x2000 mm, glazed with Pyropelite 12 from AGC Flatglass (total thickness 36 mm) The LVH44-G system was placed directly on top of the glazing.The fire-resistance of the tested construction is classified as 30 minutes E and EW according EN 1364-1.

The fire test evidence (report WFRG-14097A) applies only to a structure as tested.