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Our explosion-proof servo motors are designed to meet the specific needs of various industries. They are suitable for potentially explosive and hazardous environments, such as the production, processing, transportation, and storage of flammable materials in chemical and petrochemical plants. Furthermore, they are used in oil and gas production processes, mining, and other applications, including the food industry, where exposure to atmospheric oxygen may create explosive gases, vapors, and mists. Oil and Gas Industry Oil and natural gas processed in the petrochemical industry are inherently flammable. This creates a constant risk of explosions and fires, posing a threat to both equipment and personnel. Explosion-proof servomotors ensure safe operation in such conditions, minimizing the risk of accidents. Chemical and Pharmaceutical Industries Volatile organic compounds (VOCs) are used in the pharmaceutical industry, particularly in drug synthesis and extraction facilities, as well as in chemical laboratories. Their vapors, when mixed with air, can reach explosive concentrations. In the presence of open flames, high temperatures, or electric arcs, there is a risk of fire or explosion. Explosion-proof servomotors ensure safety in such areas, preventing potential disasters. Coatings Production Automated coatings production lines generate flammable mists and volatile components when spraying powders or paints. Without proper spark protection or if the motor surface overheats, this can lead to a fire or explosion. Explosion-proof servomotors are designed to operate in these environments, ensuring safety and reliability. Dust-Proof Environments Explosion-proof servo motors are also suitable for environments containing explosive dust, such as magnesium, aluminum, and aluminum bronze. These dusts can burn even in low-oxygen air and, when suspended, can cause long-distance explosions. The motor’s special design prevents combustion, ensuring safe operation in such environments. MOSEN explosion-proof servo motors are a reliable solution for operating under extreme conditions, ensuring safe and efficient operation across various industries.

Classification of Dust Zones According to the ATEX Standard Dust clouds in hazardous areas (at concentrations above the minimum explosive concentration) are divided into three zones according to emission class (according to EN 60079-10-2:2009). Zone 20 The 20 marking indicates the continuous presence of combustible dust in quantities sufficient to form an explosive mixture with air. In these zones, the ignition and detonation potential is particularly high. Typically, the operation of electrical equipment in these zones is prohibited, or the equipment is moved outside of Zone 20 to less hazardous zones 21 or 22. Thus, Zone 20 is an area with a continuous presence of dust, where the use of electrical equipment is prohibited. Molson supplies explosion-proof servomotors for Zones 21 and 22. Zone 21 The II 2GD Ex d IIB T4 marking indicates that motors are intended for use in areas where combustible dust may form in quantities sufficient to form an explosive mixture with air, but not in quantities equivalent to those in Zone 20. The ignition and detonation potential is also high here. Zone 22 The II 3 GD Ex nA IIC T3 marking indicates that an explosive atmosphere in the form of a combustible dust cloud is unlikely to occur under normal operating conditions. If it does occur, it will only last for a short time. Factors Affecting Dust Explosiveness The delineation of hazardous areas is often complex due to the numerous factors that need to be considered. Key factors include: Physical properties of combustible materials—composition, particle size, volatility. Concentration of gases, vapors, mists, and liquids in the surrounding environment. Nature of emission sources—intensity and duration. Ventilation conditions—availability and effectiveness of ventilation systems. Measures to prevent the spread of gases, vapors, and mists. Factors affecting the volatility of combustible materials. Safety data for the production site….

Explosion-proof servomotors for gas and dust environments have different requirements, determined by their explosion protection class and protection level. In the field of explosion protection, IEC (International Electrotechnical Commission) standards are widely used, which include classifications for gas (Gas Group) and dust (Dust Group) environments. Explosion-Proof Servo Motors for Gas Environments These motors are designed for operation in environments containing explosive gases. They undergo special testing and feature design features that prevent sparks or overheating, which could lead to an explosion. Dust Environment Requirements Dust environments have their own unique characteristics. When suspended, dust particles can form explosive mixtures with air. Therefore, servo motors used in such environments must meet strict explosion protection requirements and have the appropriate protection class. Dust zone classification is typically based on the flammability, explosion hazard, and other characteristics of the dust. Standard IEC 60079-0 defines dust groups and categories, as well as the corresponding protection levels. If your equipment will be used in a dusty environment, it is important to select servo motors certified for such environments and with a protection class that meets the requirements of your environment. Key Factors When Selecting Servo Motors for Dust Environments Explosion Protection Class:Dust is classified into groups and categories based on its flammability and explosiveness. Ensure that the selected servo motor has the appropriate explosion protection class, such as ExII 2D or ExII 3D. Ingress Protection (IP):The servo motor should have a high degree of protection against dust ingress, such as IP6X, which ensures complete protection against solid particles. Enclosure Materials:Choose motors made of corrosion-resistant materials that are resistant to dust. This will ensure the longevity and reliability of the equipment. Temperature Class:Dust environments can experience elevated temperatures, so it is important that the servo motor has the appropriate temperature class. Certification:Ensure that the equipment complies…

To understand the difference between explosion-proof and standard servomotors, it’s important to understand their design and application. Standard servomotors can generate sparks during operation, making them unsafe for use in environments where flammable or explosive substances are present. For example, in coal mines, petrochemical plants, or the chemical industry, even a small spark can have catastrophic consequences. Explosion-proof servomotors solve this problem because their design eliminates the possibility of sparks, making them indispensable in hazardous environments. Key Features of Explosion-Proof Servomotors Explosion-Proof Motor Design Explosion-proof servomotors are equipped with a special explosion-proof junction box and bushing, preventing the possibility of fire. The motor housing is made of high-strength, corrosion-resistant, explosion-resistant materials. Ingress Protection (IP) Explosion-proof servomotors have a minimum IP55 rating, but can also be IP64 or IP65. Normal servomotors typically have IP23, IP44, IP54, IP55, or IP56 ratings. Explosion-Proof Marking The housing of an explosion-proof servomotor is marked with a marking indicating the explosion protection type, equipment category, gas group, and temperature class. For example, Ex d IIB T4. This marking indicates the motor’s suitability for use in environments with flammable gases or dust. Casing Materials The casing of explosion-proof motors is made of materials with a limited content of light metals, such as aluminum, titanium, and magnesium. The magnesium content must not exceed 6%, and the combined titanium and magnesium content must not exceed 15%. Safety Clearances and Temperature Classes Explosion-proof servomotors are tested for maximum safety clearances (A, B, C) and temperature classes (T1–T6). The permissible motor surface temperature ranges from 85°C to 450°C, depending on the class. Temperature Sensors A PTC thermistor is built into the motor stator, which signals overheating, preventing accidents. Cost of Explosion-Proof Servomotors The price of explosion-proof servomotors is significantly higher than that of standard motors and can range from several thousand…