Dayton
Dayton 3HGK7 24 V round fire smoke damper 15 5/8 in
A 24 V dynamic fire and smoke damper for 8 in square ducts with a 15 5/8 in overall width
- 24 V AC actuation enables automated fire and smoke control
- Dynamic damper rated for 3000 fpm maintains airflow under emergency conditions
- Galvanized steel blade and 20 ga frame resist corrosion in ductwork
- Square rough opening 15 5/8 in fits nominal 8 in duct systems
- UL-classified fire and smoke rating protects life safety in HVAC installations
Product identity
The Dayton 3HGK7 is a round fire and smoke damper designed for HVAC systems that require automatic closure during fire or smoke events. It operates on a 24V AC supply and fits a nominal duct diameter of 8 inches. The single-panel assembly uses galvanized steel blades within a 20 gauge frame. It is intended for commercial and industrial installations where dynamic fire protection is specified.
Build integration
The damper mounts in a square rough opening 8 inches wide with an overall width of 15 5/8 inches and an overall length of 16 inches. Its height is 7 7/8 inches, matching the overall diameter, allowing it to sit within standard ductwork without additional transition pieces. The 24V actuator connects to the building fire alarm or smoke detection circuit. The frame thickness and blade material meet typical code requirements for dynamic rated assemblies.
Sustained operation
Rated for a maximum air velocity of 3000 fpm and a maximum air pressure of 4 in wg, the damper maintains its seal under normal system airflow and during emergency pressurisation. The galvanized steel construction resists corrosion through repeated heating and cooling cycles. The dynamic rating confirms the blades can close against moving air, ensuring reliable operation when the fire signal is received.
Highlights
- 24 V AC actuation enables automated fire and smoke control
- Dynamic damper rated for 3000 fpm maintains airflow under emergency conditions
- Galvanized steel blade and 20 ga frame resist corrosion in ductwork
- Square rough opening 15 5/8 in fits nominal 8 in duct systems
- UL-classified fire and smoke rating protects life safety in HVAC installations
Specifications
| Brand | DAYTON |
|---|
Questions about this item
Will the 3000 fpm velocity rating hold up during a prolonged fire event?
The damper is rated for a maximum air velocity of 3000 fpm under dynamic conditions; sustained fire exposure may reduce effective airflow below this limit.
How much heat does the 24 V actuator generate when powered continuously?
The 24 V AC actuator draws minimal current, so heat output is negligible during all-day operation.
What control circuit must already be in place to drive the 24 V actuator?
A 24 V AC power source and a compatible fire-alarm or building-management relay are required to operate the actuator.
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