Specification:
UL555S Motorised Smoke Damper 90 minutes rated, Class II Leakage at 250oF with 16 Gauge Frame and 3V groove blades and 18 Gauge sleeve as standard, fixed with UL Blade seals and Fire Stop Sealant. Factory fitted and tested with Belimo UL TRD and 9 Nm Honeywell UL spring return actuator.