Emergency ventilation system for biological/chemical contamination

摘要

A dual-emergency response system includes a common supply line that selectively conveys a fire extinguishing fluid to extinguish a fire and conveys life-sustaining air to displace air contaminated by biological or chemical toxins. A valve that distinguishes between the fire extinguishing fluid and the life-sustaining air opens to convey the air, but closes to prevent the fire extinguishing fluid from escaping. The valve is installed alongside an overhead spray nozzle of a fire sprinkler system.