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Explosion Suppression Systems

Explosion suppression systems are designed to suppress or extinguish an explosion or deflagration.  All IEP Technologies Suppression Systems are designed to meet or exceed Standards set by the National Fire Protection Association (NFPA).

Here are examples of how SysTech addresses explosion suppression needs…

In an explosion suppression system, dynamic rate of rise or static pressure sensors are used to detect and activate suppressant bottles containing sodium bicarbonate before an event can become a full-scale explosion.  Features include:

  • Prevents pressure build-up and secondary explosions
  • Extremely fast response
  • Effective where vent panels cannot be employed inside of buildings
  • Can be added as an isolation component instead of a flap valve

An IEP Technologies explosion suppression system is comprised of one or more suppressor bottles or extinguishers, a MEX-3 Dynamic Rate of Rise explosion detector and an EX200 or EX8000 multizone control panel.

Explosion Suppression Chemical Bottles

Suppressor bottles are available in 4, 10, 20, 30 KG sizes and are preloaded filled with FDA Compatible sodium bicarbonate. The most frequently selected and installed by SysTech is the PistonFire II Suppressor and the Spherical Dry Chemical Extinguisher. Both react the same but differ in that they provide different levels of suppressant when activated.

Pistonfire Suppressor

Pistonfire II Suppressor

PistonFire II Suppressor

The PistonFire suppressor is assembled with a pressurized suppressant storage cylinder and a valve body that contains a National Electrical Manufacture’s Association (“NEMA”) dust-ignition proof, weatherproof enclosure. The NEMA enclosure houses the actuating mechanism, pressure switch, pressure gauge, fill valve, OSHA supervisory switch, and field wiring connections. It is completely sealed with a screw cover and an EXP quick-disconnect connector for field wiring connections. Upon detection of an incipient explosion, the suppressor receives an actuation signal from the EX200 Control Panel. The actuating mechanism, within milliseconds, initiates the rapid release of the pressurized, dry-chemical suppressant into the protected area.

Competitive advantages include:

  • DOT, TC approved – pressurized and leak-tested at the factory and shipped to the site. Pressurizing and leak testing at customer facility NOT REQUIRED.
  • Monitored and interlocked low-pressure switch per latest version of NFPA 69
  • Non-explosive initiators, safe to handle (no ATF or UN restrictions)
  • OSHA lockout plate per latest version of NFPA 69
  • Nozzles can be inspected in-place (NFPA 69). Removal or vessel entry NOT REQUIRED.

Spherical HRD Dry Chemical Extinguisher

Spherical Dry Chemical Extinguisher

HRD Dry Chemical Extinguisher

The HRD dry chemical extinguisher is like the Piston Fire in function but differs in the amount of contained suppressant. It discharges suppressant in milliseconds to quench an incipient explosion within a process vessel or to block the propagation of flame through interconnected ductwork. It is a spherical refillable container constructed of a high strength steel alloy. The extinguisher is comprised of a storage container, fill valve, burst disc valve assembly, safety plate, 30-inch long actuator cable and an explosive triggered actuator.

Location, number required and positioning of bottles on an explosion suppression system is determined by IEP Technologies engineering staff. Their knowledge and experience make them well qualified for designing and applying explosion suppression systems.

Dynamic Explosion Detector

 The MEX-3 Detector senses the rate of rise and differentiates between an actual explosion and process pressure fluctuations.

Applications Where Explosion Suppression May Be Required

Explosion suppression systems are crucial and required protection needed for applications such as:

  • Dust collection systems – Explosion suppression and/or isolation are common options included in these types of systems where compressed air cleaning of filter cartridges creates a dust cloud.
  • Spray drying systems – An explosion suppression system is needed due to the high volume of potentially explosive material.
  • Fluid bed dryers/coolers – Combustible process material requires an effective explosion suppression system.
  • Flash dryers – Explosion suppression protection is needed because of the danger created by combustible dust.
  • Milling systems – Combination of combustible dust and ignition hazard from moving parts necessitates an explosion suppression system.

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