Exproof Motor
Explosion-proof (exproof) electric motors for explosive gas and dust atmospheres: low-power, 1,500 rpm models and selection criteria.
Products (1)
Brands: Miksan
What is an exproof motor?
Exproof (explosion-proof) motors are electric motors specially designed for safe use in environments containing flammable gases, vapors, or dust that carry a risk of explosion. The motor casing and terminal box are manufactured to prevent any internal spark or heat from igniting the explosive mixture in the surrounding atmosphere. Primary applications include chemical and paint plants, fuel stations, refineries, flour and feed mills, mines, and solvent stores.
How is an exproof motor selected?
The zone classification of the environment is the key factor when selecting an exproof motor. For gases, zones 0, 1, and 2; for dusts, zones 20, 21, and 22 are defined in the workplace explosion-protection document. The motor's protection type, equipment group, and temperature class must match the properties of the flammable substance present. Power, speed, voltage, and mounting configuration are determined by the driven machine, as with standard motors. The model in this category is low-power and rated at 1,500 rpm.
Installation and maintenance
Connections to exproof motors must be made using explosion-proof cable glands and connection components by competent personnel. The gasket and bolts of the terminal box cover must be fitted completely; drilling or welding on the casing that would compromise the explosion protection must not be carried out. Maintenance and repairs must be performed in accordance with the manufacturer's instructions. Dust accumulating on the motor surface can cause overheating and must be cleaned regularly.
Applications
- Flammable liquid and solvent pumps
- Mixers in paint and chemical plants
- Exproof fans and aspirators
- Dust and grain conveying systems
- Conveyors in explosive environments
Frequently asked questions
Can a standard motor be used in an explosive environment?
No. Only exproof motors of the appropriate class must be used in explosive environments.
How do I find out my zone classification?
It is stated in your workplace's explosion protection document. If none exists, a qualified expert must be commissioned to prepare one.
Is maintenance of an exproof motor different?
Maintenance must be carried out in accordance with the manufacturer's instructions in a manner that does not compromise the explosion protection.
What does temperature class mean?
It indicates the maximum surface temperature the motor can reach. This must be lower than the ignition temperature of the substances present in the environment.
Are exproof fans available?
Yes; you can browse the exproof fans category.
What should I do if I need a different power rating?
You can provide the required power and class information and request a quote.
Why is the nameplate of an exproof motor important?
The nameplate contains the markings that indicate in which zones and under which conditions the motor may be used. This information must be kept legible and intact.