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MOTORISED FIRE & SMOKE DAMPER
UL 555 / UL 555S Classified · MSFD Series
Designed to protect duct and air transfer openings that penetrate fire- and smoke-rated walls and floors.
UL 555 classified for 1½ hour (MSFD-90) and 3 hour (MSFD-180) fire ratings.
UL 555S classified for leakage Class I, II or III, rated for airflow and leakage in either direction.
Dynamic rated to 10.2 m/s (2000 fpm) and 1000 Pa (4.0 in. wg), with operation at 121°C elevated temperature.
Honeywell or Belimo actuators: 230 V AC as standard, 24 V or 120 V AC optional;
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UL 555 & 555S
CLASSIFIED -
1½ & 3 hour
FIRE RATINGS -
Class I, II & III
LEAKAGE -
File R27369
UL LISTING
UL 555 / UL 555S Classified · MSFD Series
Designed to protect duct and air transfer openings that penetrate fire- and smoke-rated walls and floors.
UL 555 classified for 1½ hour (MSFD-90) and 3 hour (MSFD-180) fire ratings.
UL 555S classified for leakage Class I, II or III, rated for airflow and leakage in either direction.
Dynamic rated to 10.2 m/s (2000 fpm) and 1000 Pa (4.0 in. wg), with operation at 121°C elevated temperature.
Honeywell or Belimo actuators: 230 V AC as standard, 24 V or 120 V AC optional;
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Accessory – actuator
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