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ACTIONAIR Express Service For First “ES” Rated Fire And Smoke Control Damper For Circular Ductwork

Cost effective fire safety in Britain's buildings takes a significant step forward with the launch of the new Actionair CSS range of ES Rated Smoke and Fire Dampers.

The new Dampers have been specially developed by the UK's market leaders to meet demand for effective control of fire and especially smoke in standard circular/spiral ductwork systems.

This type of ductwork accounts for something like 50% of the ducting installed in commercial and public sector buildings in the UK. There’s an urgent need for dampers meeting the stringent new ES fire rating that can be easily fitted in all types of location and particularly where ducts must pass through fire-rated stud walls.

Actionair's new CSS range will meet this need – fast. A full range for duct sizes from 100 mm to 355 mm is being offered on guaranteed express delivery to site.

Real threat
Industry standards now reflect the fact that, when buildings burn, actual flame is a relatively minor hazard in terms of human safety. It is the thick, heavy, all prevailing smoke frequently produced by even a localised outbreak of fire that poses the real threat. Smoke inhalation is disabling and all too often fatal.

Ductwork is designed to distribute air efficiently. If protective measures are not engineered into the design in the form of effective fire and smoke dampers, it will be just as efficient in the distribution of smoke – quickly endangering building occupants not directly in contact with the fire zone.

In recognition of this fact Building Regulations Part B Fire Safety now require that fire dampers should be tested to BS EN 1366-2:1999 and should have an ES classification equal to, or greater than, 60 minutes.

At the heart of the Standard is the ES Classification where “E” represents integrity and “S” represents the smoke seal. The method of installation is also crucial, because the performance of the damper under test (and in application) will vary according to how it is integrated into the structure.

Actionair’s new CSS smoke and fire damper design meets this requirement in full and is the only one of its kind to achieve 2-hour ES classification.

The secret behind Actionair's ability to meet this stringent test standard lies in the unique and patented seal, which ensures ES leakage performance in both ambient and fire conditions.

2-hour fire protection
Actionair CSS Dampers are designed for use with both plain and insulated circular ductwork up to 50mm in air conditioning and ventilation systems requiring up to 2-hour fire protection.

Two types are available: the Actionair CSS Smoke/Fire Damper, which features circular bladed dampers spring-loaded to fail/safe to the closed position and a Vent version for automatic smoke release, factory fitted with a compact Actionair control mode which fails/safe to open if electrical power is lost.

All models are housed in galvanised steel casings - complete with twin flanges for fast, simple installation.
Two types of factory-fitted control modes are available - to offer a specification matching choice of either 24 volt (Type 5) or 230 volt (Type 6) motors. Both types are designed for easy remote release/ reset to simplify test procedures and feature volt free contacts to ensure full compatibility with monitoring and control systems such as the Actionpac multiple damper control system.

Both Type 5 and 6 Control Modes feature Actionair's patented Electric Thermal Release (ETR) which automatically operates the Damper at 72oC, or if the power supply is interrupted.

The ETR incorporates triple safety features including an ingenious device, which maintains the fail/safe status of the Damper if the ETR is incorrectly fitted to the casing. A standard green LED built in to the ETR housing provides a simple visual check that all is well.

A manual test switch simulates fail/safe release, as under fire and smoke conditions, so that periodic testing of the damper system can be carried out.

Factory fitted and fully tested CSS ES Fire and Smoke Damper control modes are mounted outside the ductwork for easy installation and access.

Actionair CSS ES Rated Fire and Smoke Control Dampers are available in a range of sizes from 100 to 355 mm diameters. They are suitable for systems operating at total pressures up to 1500 Pascals and duct velocities up to 15m/sec. Dampers are tested to the requirements of EN 1366-2.

New CSS Models make a perfect complement to the popular Actionair Smoke/Shield range of circular and rectangular damper designs.


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Arundel Jones Associates Ltd Registered in England and Wales No. 07334149
Hill Farm, Linton Hill, Maidstone, Kent ME 17 4AL
Tel : 01622 745333 email
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