Andover Protection Systems, LLC designs and builds all of its products specifically for harsh conditions, whether intended for hazardous-duty (explosive/flammable) or for ordinary (non-explosive/non-hazardous) environments. As a result, all units have the following features to make them more durable and reliable than light-industrial and commercial-grade units:

Easy and safe wiring

Adaptable design to fit users’ configuration

Many electrical configurations available

In some applications, APS compressors can eliminate the need for a separate NEMA 7 boxes because the enclosures have enough space to house thermostats or other controls)

Compatible with most refrigerants (HFCs, HCFCs, CFCs, CO2, propane (R290) and isobutane (R600a))

Models for low, medium and high-temperature applications

Installed in dozens of countries around the world

Make construction and installation of air-conditioning and refrigerating systems faster, easier and less expensive while increasing the flexibility of the designs.  (In fact, in many cases the APS compressors are so compact that the OEM can use essentially the same design as it would for ordinary (non-hazardous) versions of their chiller or other product.)

Why use APS compressors?

No other compressors are tested and expressly recognized by Underwriters Laboratories (UL) as safe for use in either Division/Zone 1 or Division/Zone 2 locations in any class or group.

APS does not change the operation or performance of the compressors, just makes them safer.

When you assemble a complete product, APS’ proven designs and UL’s recognitions assure that the compressor is safe for the indicated environments.  Therefore, the compressor of the unit will not have to be tested independently to verify its safety, thereby reducing the costs of UL’s and other Nationally-Recognized Testing Laboratories’ (NRTLs) investigating and listing of your products.

Standard electrical enclosures have 3 1 /2 ” (8.9 cm) internal diameters to facilitate wiring, and even rewiring, because a technician can fit his/her hand inside to reach the compressors’ terminals and work on the wiring.

The enclosures protect electrical connections in corrosive, wet, and other harsh environments.

APS protects all its compressors with resistant coatings to assure long life in corrosive environments.

If you have any questions or comments, please let us know. If you have a specific application in mind, please complete our Compressor Project Inquiry Form or our Air Cleaning Blower Project Inquiry Form. We look forward to responding to you as quickly as possible.

  • For an overview of APS’s Hazardous-Duty Refrigeration and Air-Conditioning Compressors, Click here.
  • If you have a specific application in mind, please complete our Project Data Form for Hazardous-Duty Compressors. An engineer will then prepare a proposal with our recommended solution.
  • If you have questions about how hazardous/explosive areas are classified, Click here.
  • For an overview of APS’s Air-Cleaning BlowersTM (ACBs) that blow and clean air in hazardous areas, Click here.
  • All APS products retain their UL recognitions in all applications when modified for hazardous (“explosion-proof”) environments. Click here
  • If you have more general questions or comments, please use our Contact APS Form.