The ExdIIBT4 explosion-proof motor use an explosion-proof housing, which is the core protective component of the explosion-proof pump. It is integrally die-cast without any seams. Even if sparks or minor explosions occur inside the motor due to a malfunction, the housing can withstand the explosive pressure and prevent flames from escaping to ignite external flammable and explosive materials.
The junction box is an explosion proof wiring device. An explosion-proof seal resistant to oil and high temperatures is installed between the box body and the cover to prevent sparks from escaping due to poor electrical connections. The material of the box body is the same as that of the motor housing, capable of withstanding the same explosion pressure. Additionally, the reserved cable entry device must be equipped with an explosion-proof sealing sleeve to prevent gaps between the cable and the box body.
The winding is the 'power source' of the explosion-proof motor, and its insulation performance directly affects explosion-proof safety. It uses Class 155 temperature-resistant copper wire (or higher grade temperature-resistant wire), treated with vacuum varnish impregnation (with H-class insulating varnish, temperature resistance ≥180°C), forming a dense insulation layer to prevent winding short circuits or sparks caused by ground breakdown.
Bearings are the "operating core" of ExdIIBT4 explosion-proof motor and must avoid generating excessive heat due to friction, which could cause danger. Therefore, high-temperature resistant ceramic or alloy bearings are selected, with a high-temperature limit of over 200°C, far exceeding the 135°C surface temperature limit required for ExdIIBT4/ExdIICT4 ratings. Meanwhile, the fit precision between the bearing, shaft, and bearing housing must reach IT5 grade to reduce the friction coefficient during operation and minimize heat generation. High-temperature grease is used for internal bearing lubrication to ensure stable lubrication performance during long-term operation, preventing friction increase and temperature rise due to lubrication failure, which could compromise explosion-proof performance.
In the field of oil transportation, ExdIIBT4 explosion-proof motor motors are mainly used for the transportation of crude oil gathering, refined oil transfer, and media delivery in refining processes. When transporting oil, pipelines and storage tanks let out volatile alkanes-basically stuff that blows up if it hits a spark. Regular motors? They risk blowing up in a second. But this motor? It can handle it easily.
Whether it's -40℃ cold or 60℃ hot, it runs steadily. Plus, it works with equipment like centrifugal pumps and gear pumps. Whether you're moving crude oil, gasoline, or diesel, it meets all the needs-it keeps the oil transport system running nonstop, with fewer shutdowns and breakdowns.
The core advantages of our company'sexplosion-proof motors are as follows:ATEX Certification: The products comply with the EU ATEX 2014/34/EU directive requirements and have obtained Ex db IIC T4 Gb, Ex db IIB T4 Gb, and Ex tD A21 IP65 T135℃ certifications, allowing direct access to the EU and international markets that recognize this standard.
·Sealing Performance: The housing has a protection rating of up to IP65, and the junction box uses a double-seal structure, preventing dust and liquids from entering the motor. It is suitable for the humid and dusty working environment of the petroleum industry, extending the motor's service life to over 8,000 hours.
·Winding Coil: Made of Class 155 temperature-resistant copper wire and treated with vacuum impregnation (insulation class H). The winding arrangement error is ≤0.1mm, reducing current loss by 5%~8%. Not just tough, it's energy-saving too. It meets the IE3 efficiency standard, and it also cuts down on winding heat-taking explosion-proof safety up a notch.
In short, the motor meets industrial-grade requirements considering explosion-proof performance and stable operation aspect. It can be used safely in hazardous work sites like oil, chemical, and metallurgical etc situations.
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