Safety devices for controlled explosion pressure relief.

Automatic valves for preventing explosions by pressure relief; automatic valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines.

Rupture discs which open under pressure or a pressure specified condition, and flanges, back pressure and vacuum supports, disc sealers and burst disc indicators for use with rupture discs in process equipment; and explosion pressure relief vents; all the aforesaid goods being parts for use with pipes or vessels or other equipment

Automatic flowable material isolation valves; explosion suppressors and parts therefor, explosion suppression compositions sold in explosion suppressors; electrical controllers for detecting explosions and operating explosion suppressors; fire suppressors and parts therefor, fire suppression compositions sold in fire suppressors, electrical controllers for detecting fires and operating fire suppressors

Chemicals for use in fire extinguishing and fire prevention compositions; fire retardant chemicals.

An automated voice announcement system for building evacuations