Lorient Polyproducts UK
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Lorient Pacific Ltd
Unit 509, 5th Floor
Block A
Ming Pao Ind Ctr
18 Ka Yip Street
Chai Wan
Hong Kong
Tel: +(852) 2505 0328
Fax: +(852) 2505 0332
sales@lorienthk.com
Registered Office: Fairfax Road, Heathfield, Newton Abbot
Registered In England No. 1441058
Fire and Smoke Resistant Damper/Air Transfer Grilles
Relevant Downloads
- Fire Resistant Dampers/Air Transfer Grilles brochure
- ATG Technical Seminar Leaflet
- Lorient Intumescent Sealant
You will need Adobe Acrobat Reader to read these documents.
Fire resistant walls and floors in a building play an important part in containing the spread of fire and smoke. However, a building also needs to be well ventilated for the health and comfort of its occupants. Systems of natural and mechanical ventilation often require ducting to pass through fire resistant walls and floors, and this can compromise the fire containment in the building.
The Lorient solution is to fit intumescent air transfer grilles at the point where the fire resistant wall or floor is breached. Under normal circumstances these grilles allow air to pass freely through the building. However, in the event of fire the slats and frame swell to 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 smoke and gases.
When combined with automatic smoke control systems, Lorient's intumescent air transfer grilles will also provide protection against cold 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 normal circumstances the dampers/shutters remain open allowing the free passage of air.
To find out more about the advantages of intumescent dampers, and to make sure you’re up to date with the latest standards and requirements, download and complete Lorient’s new ATG Technical Seminar leaflet or contact our ATG department .
Products in this category
Non-Vision Style Grilles – LVN20 and LVN25
can be used to provide resistance to fire and hot smoke of up to 60 minutes in fire rated doors angled slats to ensure complete visual privacy supplied in two halves to accommodate different thicknesses of doors complete seal achieved in approximately five minutes when tested in accordance with BS 476: Parts 20/22 allows bi-directiona...
Vision Style Grilles – LVV40 and LVC40
can be used to provide resistance to fire and hot smoke of up to 60 minutes in doors and walls excellent airflow characteristics which result in silent efficient operation in normal use complete seal achieved in approximately five minutes when tested in accordance with BS 476: Parts 20/22 can be used with a cover grille for a neat finis...
High Performance Vision Style Grilles – LVH44 and LVHC44
Heavy duty intumescent air transfer grilles designed for use in the aggressive environments often found in industrial premises. can be used to provide fire resistance of up to 180 minutes complete seal achieved in approximately two minutes when tested in accordance with BS 476: Parts 20 and 22 exhibit excellent airflow characteristics an...
High Performance Vision Style Damper for Ducts - LVH54
Part of Lorient’s LVH range of high performance intumescent dampers, the LVH54 has been specifically developed to meet the tough requirements of BS ISO 10294 Part 5 - the new international standard for intumescent dampers in duct applications. During the BS ISO 10294-5 test, the LVH54 was successfully proven to: form a complete seal with...
Cassette Type Damper - LVHCTD
Lorient’s Cassette Type Damper allows simple and rapid duct installation in small spaces, along with excellent access during commissioning and servicing. Sliding cold smoke shutter module allows easy access for servicing Easy installation of damper into fire compartment boundary Shutter plates tolerate a pressure differential of 300Pa ...
Talkback Damper/Shutter Control System
All ducts and airways in doors and walls can be protected against fire and hot smoke using Lorient intumescent air transfer grilles. However, these grilles will not prevent the passage of cold smoke which can be equally dangerous. To address this problem Lorient has developed a smoke damper/shutter assembly for use in conjunction with Lorien...
Intumescent Sealant
Lorient Intumescent Sealant is a versatile seal solution to fill gaps and movement joints; and for use where rigid seals are impractical. when exposed to fire, the Intumescent Sealant expands in volume to fill all cavities; providing a necessary hot smoke seal; suitable for sealing gaps between fire resistant walls and floors, between c...