Cassette Type Damper - LVHCTD + LVH44/LVH54

Lorient’s Cassette Type Damper allows simple and rapid duct installation in small spaces, along with excellent access during commissioning and servicing. When used with an LVH44 or LVH54 air transfer grille can provide up to 240 minutes fire and smoke resistance.

Inclusion of LVH44 air transfer grille will provide up to 120 minutes fire resistance. Inclusion of LVH54 air transfer grille will provide up to 240 minutes fire resistance and 30 minutes insulation.

Features and benefits:

• Manufactured using welded galvanized steel sheet with the smoke shutter plate location formed by galvanized steel spacer strips.
• Intumescent fire seal strip prevents hot gas leakage.
• Shutter plate assembly is produced from 3 sheets of fire resistant glass reinforced plastic of low toxicity.
• Actuator motor and circuit board are protected within a removable galvanized steel enclosure.
• Sliding cold smoke shutter module allows easy access for servicing.
• Easy installation of air transfer grille into fire compartment boundary.
• Shutter plates tolerate a pressure differential of 300 Pa.
• Low cold smoke leakage rates.
• May be used purely as a cold smoke damper by excluding the air transfer grille.
• Can incorporate either LVH44 or LVH54 air transfer grilles.
• Controlled by ‘Talkback’ system providing status information + auto-cycling.

This system has been designed to control up to 16 damper/ shutter assemblies from one centralised, status monitoring unit.

• It is fail-safe – the dampers/ shutters automatically close in event of an alarm, power failure or wire damage.
• Resets automatically – when alarm is cancelled or power restored.
• Self-testing – every 24 hours the dampers/ shutters are automatically closed and opened to ensure they are working, dislodging any dust/ debris.
• Continuously monitors status of each damper/ shutter and displays this on the DCM.