9 Fire extinguishing apparatus, namely, devices that vent explosions by arresting the flame and discharging post-combustion gases; Explosion detectors for industrial use; Rupture disks that burst at a predetermined pressure to protect vessels, equipment or systems from overpressurization; Explosion protection isolation valves for safety purposes, namely, valves for controlling and regulating the flow and transmission of pressure, flame, gases or liquids not being parts of plumbing, heating or cooling installations and/or of machines; Explosion suppressors and parts therefor; Explosion suppression compositions sold in explosion suppressors; Electrical controllers for detecting explosions and operating explosion suppressors; Fire suppression equipment-namely, fire extinguishing cylinder heat sensors and control panels; Fire alarm control panel and fire detection sensors; Control panels for fire detection alarm and suppression systems; Fire suppression systems consisting of containers for holding and nozzles for discharging fire extinguishing compositions, and computer software for calculating and evaluating flows of fire extinguishing systems; Active explosion suppression systems consisting primarily of explosion protection controllers, power supply units, relay cards, annunciator modules, explosion detectors, suppressant storage containers, discharge nozzles and explosion detectors; Compressed gas chemical agent release valves for use in fire suppression systems; Fire suppression equipment, namely, control panels, containers, flow rate valves, directional valves, piping and nozzles for inert gas fire extinguishing; Fire suppression equipment, namely, a water delivery system comprised of piping networks, water containers, air containers, regulators, water valves, air valves, solenoid actuators, water nozzles, electronic detection modules, and control mechanisms comprised of control panels, solenoid releasing modules, and heat detectors; Control panel for fire suppressors; Computer software used for controlling fire alarms and fire alarm control panels