Acoustic, smoke & fire containment systems

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The DS range from Lorient proves that the best things in life are really three!

Recent revisions to Approved Documents E, B and M have made the regulations affecting doors particularly arduous. Lorient, an acknowledged leader in acoustic, smoke and fire containment systems, provides innovative solutions to meet the demands of all three Approved Documents; highlighted by the launch of the DS seal.

The DS seal is truly unique, offering an ingenious integrated solution for acoustic, smoke and fire containment. All three regulations are covered: successfully fire and smoke tested to
BS 476 Pt.22:1987 and BS 476 Pt.31.1:1983 ; it will meet the requirements of Document B; while unique dual fins provide continuous acoustic and smoke protection at ironmongery points – essential for meeting the new acoustic requirements of Approved Document E. Furthermore, the twin elastomeric fins provide exceptionally low frictional resistance to everyday opening and closing forces, taking the requirements of Document M into account.

Under Lorient’s extensive acoustic testing programme, various smoke seal profiles were tested for their performance. Tests were undertaken on a typical FD30S door assembly, in conjunction with a Lorient IS8010 si automatic threshold seal. Smoke seals with elastomeric fins were proven to provide a far superior acoustic performance to a traditional brush type seal. Lorient’s DS seal gave a result of 31dB Rw, whereas a typical brush type smoke seal performed to only 23dB Rw – not sufficient to meet the requirements of Document E.

Besides being tested for outstanding acoustic performance, the DS seal has achieved over 1 million opening and closing cycles on a full size door assembly, without degradation, proving its durability.

The DS seal is available in a variety of standard colours with black fins – to blend or contrast with surroundings as required; with a range of sizes to cover both 30 and 60 minute applications.

The DS seal carries both BBA and CERTIFIRE (CF330/CF341) certification and is available in standard lengths of 1m and 2.1m, with other lengths to special order.