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Hazardous fencing above Polar King unit

Keeping safe in hazardous locations

Safety comes first at Polar King, which is why we build standard explosion proof refrigerators and freezers or create custom units to fit your specific needs. Our explosion-proof units have spark-proof interior and exterior surfaces with no internal electrical components to prevent ignition in hazardous environments.

Further, all exterior components meet OSHA and National Fire Protection Association (NFPA) standards for safely storing volatile materials. Our explosion-proof refrigerators and freezers also comply with Chapter 5 of the National Electric Code.

Standard features for explosion-proof refrigerators and freezers

  • Contents are separated from electrical components to prevent explosions inside or outside the unit as per Chapter 5 of the National Electric Code
  • Units rated for class 1, 2 and 3, division 1 and 2 and zones 0, 1 and 2
  • Models available in a variety of sizes and configurations
  • 12-year complete structural warranty
  • Industry-leading energy efficiency

How our explosion proof refrigerators and freezers rate

We offer class 1, 2, and 3, division 1 and 2 and zone 0, 1 and 2 ratings for both the interior and exterior explosion proof refrigerator and freezer of the walk-in module. All of our flammable proof refrigerator and freezer units can offer gas detection system (LEL) and/or an integrated 500-gallon containment sump.

Classes

Classes define the type of explosive or ignitable substances which are present in the atmosphere. Our explosion proof refrigerators and freezers are rated for the following North American classes:

  • Class 1
    Flammable gases or vapors are present in the air in quantities sufficient to produce explosive or ignitable mixtures. Class 1 locations include petroleum facilities, dry cleaning plants, and spray-painting operations.
  • Class 3
    Ignitable fibers or flyings are present, but not likely to be in suspension in sufficient quantities to produce ignitable mixtures. Group classifications are not applied to this class. Class 3 locations include cotton gins and wood product factories.

Divisions

Divisions define the likelihood of the hazardous materials being present in a flammable concentration. Our explosion proof refrigerators and freezers are rated for the following North American divisions:

  • Division 1
    Ignitable concentrations of hazards are present during normal conditions and/or hazard is caused by frequent maintenance and repair work or equipment failure.
  • Division 2
    The substance referred to by class is present only in abnormal conditions, such as a container failure or system breakdown. Ignitable concentrations of hazards are handled, processed, or used but are normally in closed containers or closed systems. Hazards can only escape through accidental rupture or breakdown of their containers or systems.

Zones

Zones define the length of time hazardous explosive or ignitable substances are present in the atmosphere. Our explosion proof refrigerators and freezers are rated for the following North American zones:

  • Zone 0
    Hazardous, explosive, or ignitable substances are present continuously or for long periods of time.
  • Zone 1
    Hazardous, explosive or ignitable substances are likely to be present or are frequently — but not continuously — present under normal operating conditions.
  • Zone 2
    Hazardous, explosive, or ignitable substances are present only under abnormal conditions or only for short periods of time.

Options and accessories for flammable proof refrigerators and freezers

  • Gas detection system (LEL)
  • Integrated 500-gallon containment sump
  • Shelving
  • Ramps
  • Door view windows
  • Security hasp locks
  • Stainless steel kick plates
  • Digital thermometers
  • Temperature data recorders
  • Exterior lighting
  • And much more!
A Polar King portable walk-in freezer with a red fire extinguisher on the back
Inside of a Polar King portable cooler unit

Have a unique application? We’ve got the solutions you’re looking for!

From fully functional kitchens and modular buildings to refrigerated vans and clean room panels, Polar King has a track record of success in special use projects. When you need something out of the ordinary, we can help make it happen.

Contact us