Circular Fire Damper

Application:

The class of perforemance of the circular fire damper depends on the application.

Installation in solid walls and ceilling slabs whose class of performance is lower than that of the fire damper is approved.

In this case the class of performance of the wall or ceiling slab applies also to the type of circular fire damper.

The fire damper is approved only for use in ventilation systems.Ducts must be connected on both ends,or a duct on one end and a cover grille on the other end.

Installation of fire dampers must be carried out in compliance with provision of federal state law and generally recongnized codes of practice.

Ducting must be installed in such a manner that it does not imposed any loads on the fire damper in case of a fire.

For information on how to limit such a manner please refer to the guidline regarding fire protection requirements on vetilation systems.

It is recommanded to use flexible connectors to connect rigid ducting to the fire damper for particular applications.

Flexible ducting may be connected directly to the fire damper.

Features：

Casing in galvanised sheet steel or in stainless steel.

Damper blade made of special insulation material.

Damper blade steal made of neoprence.

Air flow in either directions.

Large free cross sectional area,hence low diffrencial pressure

Release temperature 72℃ or 95℃(for use in warm air ventilation systems).

Approved installation orientation from 0° to 360°.

Dimensions:

Dimensions
Normal size	315	355	400	450	500	560	630	710	800
DN	314	354	399	449	499	559	629	709	799
A	31	31	31	36	36	36	36	36	36
D1	352	392	438	488	538	600	670	750	840
α	45°	45°	45°	45°	45°	45°	45°	45°	45°
No.of screw holes	8	8	8	8	8	12	12	12	16
Weight(kg)
With fusible link	6.8	7.3	8.5	14.1	16.4	18.0	21.3	25.7	28.6
With Spring Return Actuator	8.2	8.7	9.9	16.7	19.0	20.6	23.9	28.3	31.3