The system is said to resist damage from corrosive gases to provide effective fire protection in highly acidic ventilation and ductwork systems in widths from 1 to 16ft and at temperatures to 150ºC.

The Tyco DDS system is suited to circular, rectangular or irregular ductwork in applications including steel manufacturing, coal power generation, chemical industry and acid processing plants. The package brings together a range of components, including water spray nozzles, linear heat detection cables, duct mounting hardware and an electric actuation deluge valve cabinet as one. Available as a complete fire protection solution, the system is said to minimise downtime, limit routine inspection and reduce maintenance while ensuring the fire is extinguished safely and effectively.

Intrinsic to the system, the open directional Tyco Type DN-5 Duct Nozzles discharge a uniform spray of medium velocity water droplets that are effective in coating exposed vertical, horizontal, curved and irregular shaped surfaces. The nozzles are constructed of stainless steel and can suppress and extinguish fire in duct interiors, preventing structural damage and the spread of fire. Furthermore, the DDS nozzles are coated with HALAR, a corrosion resistant layer that can tolerate extremely acidic environments in a multitude of applications.

Another key element of this system is the PROTECTOWIRE Linear Heat Detector which provides heat detection and point sensibility along the length of cable. Consistent with the overall DDS design, PROTECTOWIRE can withstand severe application conditions, yet is sensitive enough to identify and display the alarm location. 

To allow for movement during duct vibration or seismic activity, the FLEXHEAD Duct Mounting System offers a sprinkler connection that can operate in highly volatile conditions. The model can be installed in minutes.

The Tyco Model DV-5 Cabinet is a pre-assembled fire protection valve package enclosed within a free-standing cabinet and shelters the fire protection valve riser. This occupies minimal floor space and is pre-wired with grooved connections on the water inlet and outlet to the valve riser. The system also hosts a shut-off control valve, an automatic water control valve and supervisory switches.

Arjan ten Broeke, services engineer EMEA at Tyco Fire Protection Products comments, “We are always seeking ways to enhance our portfolio of fire protection solutions in new and innovative ways. The Duct Deluge System can handle extremely corrosive environments and media including hydrochloric acid, sulphuric acid, nitric acid and others while offering cost effective and sustainable solutions for our customers.”