N30 Fire & Smoke Seal
N30 is a combined fire and cold smoke seal, offering 30 minute fire protection. It is recommended for single action FD30S fire and smoke-resistant door sets, in order to prevent the spread of fire and smoke.
The extruded aluminium alloy profile contains substantial reserves of Sealmaster intumescent material in a single reservoir. An angled self-extinguishing elastomeric blade gives maximum efficiency with minimum drag.
In normal use, the elastomeric blade seals the gap between the door and the frame, and acts as an efficient draught seal. The seal is interrupted at the hinges and lock/latch plate positions, and protection at these points is normally not essential for FD30S doors (see BS 8214).
As the fire develops and reaches the N30 Intumescent Fire and Smoke Seal, the intumescent material foams, swells and fills the gaps between the door and the frame. Since the foam remains soft during the period of intumescent action, it does not prevent the door from being opened by firefighters and the copious reserves ensure that the gap will be re-sealed should the door distort for any reason.
In new doorsets, the N30 Intumescent Fire and Smoke Seal is rebated into the head and jambs of the door frame, and is aligned with the centre of the door edge. Where N30 Intumescent Fire and Smoke Seal is fitted to an existing door assembly, the top rail and stiles of the door are easily rebated.
- Fire Prevention
- Passive Fire Prevention