ATEX EXPLOSION-PROOF MOTORS
In our Campogalliano plant we manufacture ATEX-certified three-phase asynchronous motors, suitable for Zones 22 and 2 - categories 3G/3D, intended for environments with the presence of potentially explosive dust or gases.
Seipee ATEX motors meet European safety standards for explosive atmospheres, ensuring maximum reliability even in high-risk environments.
They are the ideal solution for installations and applications where it is critical to prevent fires or explosions caused by combustible gases, vapors or dust.
As with all other product families, we offer mechanical and electrical customizations to tailor the motor to the customer's specific needs, ensuring rapid deliveries and consistent and competent after-sales service.
ATEX Zone 22 - Zone 2 3G/3D
The term ATEX (ATmosphères EXplosibles) refers to a potentially explosive atmosphere, i.e., a mixture of air, gases, vapors, or dust that, under certain temperature and pressure conditions, can give rise to an explosion.
The explosion-proof electric motors - or more simply ATEX motors - are designed to operate in these environments, ensuring safety and compliance with the two European directives governing equipment intended for explosive atmospheres.
Seipee ATEX motors are suitable for installation in the following areas:
◉ II 3G - EX nA II C T4 Gc
◉ II 3D - EX tc III C T135°C Dc IP65
◉ II 3G - EX nA II C T3 Gc
The first step in selecting a motor is to correctly determine the hazardous area.
When an electric motor is to be installed in a location where hazardous materials are likely to be present, it is the responsibility of the end user to define the appropriate class, category and group.
◉ Zone 2 (gas): occasional presence of gas-based explosive atmosphere.
◉ Zone 22 (dust): occasional presence of explosive atmosphere due to combustible dust.
ATEX distinguishes gases into four main groups:
◉ Group I (mines): methane.
◉ Group II, divided into:
- IIA → less easily flammable gases (e.g. propane)
- IIB → moderately flammable gases (e.g., ethylene)
- IIC → highly flammable gases (e.g., hydrogen, acetylene)
A device certified for IIC can also be used in areas requiring IIA and IIB.
The IEC 60079-0 standard introduces Group III, which is dedicated to explosive dust atmospheres.
Dusts are divided into three main categories, based on their characteristics:
◉ IIIA → combustible dusts of a fibrous nature (e.g., woodworking, paper, textiles).
◉ IIIB → non-conductive dusts (e.g., flour, wheat, sugar, plastic powders).
◉ IIIC → conductive dusts (e.g. coal, graphite, metal dust, sulfur).
This classification allows the selection of the most suitable ATEX motor depending on the type of dust in the environment, minimizing the risk of ignition and explosion.
CERTIFICATIONS
