Products for use in Hazardous Areas

Automating an industrial process is a complex problem when combustible vapors or dust are present in the work environment.

Two commonly used methods are Explosion Proof (EP) and Purged and Pressurized (PT). Explosion Proof devices are intended to withstand and contain an expected explosion, Purged and Pressurized systems are intended to prevent an explosion from occurring. While Explosion Proof is more widely known the Purged and Pressurized technique is more flexible and universally recognized.

The National Fire Protection Association publishes "Purged and Pressurized Enclosures for Electrical Equipment in Hazardous Locations", (NFPA496), which describes the application of positive pressure with dry air or nitrogen to convert the interior of a motor to a non-hazardous area. A copy of the standard is available from the NFPA, (call 800/344-3555). Additional information is included in the National Electric Code, also written by the NFPA.

For applications and information, the following article may be of interest:
Using Purge and Pressurization to Prevent Explosions

Empire Magnetics makes no claim as to the suitability of pressurized motors for any particular application. These products are not rated or warranted as Explosion Proof Motors, nor does Empire Magnetics assume any liability for their use in proximity to volatile materials. Responsibility for motor use lies solely with the user.

Each unit includes a ten foot cable. Cables up to 100 feet in length may be ordered. NPT cable penetration allows connection of conduit. Use of pressurized conduit is recommended. Motors are otherwise supplied with air fittings.

Hazardous Area Stepper Motors
Hazardous Area Stepper Motors

Empire Magnetics' Stepper and Brushless Servo Motors are sealed and equipped with air fittings for pressurization. With an optional temperature sensor, these Hazardous area motors can be easily designed into a system that meets NFPA requirements for Class I, Class II and Class III hazardous locations. In a typical installation - such as spray painting, printing, flour mills, fuel processing, alcohol production, chemical processing or rocket fuel machining - the motor is remotely located in a hazardous area.

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Frequently Asked Questions (FAQ) About Hazardous Area Installations

Learn about Hazardous Area Motor Applications

Typical applications: