Ravenscroft fire dampers function as an electrical reset smoke damper when fitted with a specially designed Belimo actuator.
Why Choose a Ravenscroft Smoke Damper
- Fast installation
- Fire rated up to 2 hours when fitted with a thermal tripping device
- Fitted with a Belimo spring-return motor
- No access hatch required
- Supplied as a kitset
- Custom lengths on request
- Available as plasterboard wall or concrete/masonry versions
- Stainless steel version
The motorised fire dampers have many of the same benefits as the regular Ravenscroft BSD-C and BSD-PW fire dampers. It has a two-hour fire rating as a fire/smoke damper. The installation is quick and no special framing is required, nor is a duct inspection hatch needed to check damper operation.
The Ravenscroft Smoke Dampers come fitted with a specially designed Belimo spring-return motor (cannot be fitted on site). An optional thermal tripping device allows it to be used as a combination Fire/Smoke Damper.
- Motor torque: 4/3 Nm
- Motor control: open/close
- Available motor voltage options: AC/DC 24V, AC 230V
- Running me: Motor < 60 s (0 ... 4 Nm) / Spring-return open or close 20 s
The Smoke Damper will operate on receipt of a signal from the building fire panel. Open/closed contacts provide positive feedback of the damper position. Reset is done remotely.
Co-ordination between trades on site and at time of tender is greatly reduced as the damper does not require additional hole reinforcement or framing. Actual installation time is minimised.
Flexible ductwork connectors must be used to separate rigid ducting from the damper. These prevent excess force being transferred to the plasterboard in the advent of ductwork deformation or collapse during a fire or earthquake.
Tested to AS1530.4-1990. FRR 120 minutes in plasterboard walls. BRANZ Test Report FP 2376.
For masonry walls the standard Ravenscroft fire damper, BSD-C, without the insulated sleeve is available satisfying AS1530.4-1990 for at least 120 minutes under BRANZ Opinion 97/1026.
The Ravenscroft fire damper for plasterboard walls, BSD-PW, meets the requirements of AS1682-1991 Parts 1 & 2. (Means of Code Compliance: Verification by Laboratory Test)