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Transformer oil dehydration machines are specialized, typically vacuum-based, industrial systems that remove moisture, dissolved gases, and solid contaminants from insulating oil to prevent dielectric breakdown in power equipment. They are essential for maintenance in power generation, Petrochemical, and renewable energy sectors, often reducing moisture levels from over 100 ppm to less than 5 ppm. These units typically utilize heating, vacuum, and multi-stage filtration to restore oil to international standards like IEC 60296, with flow rates varying from 300LPH up to over 12,000LPH.
Types of Transformer Oil Dehydration Machines
- Vacuum Transformer Oil Dehydration Machines: The most common type, utilizing low-pressure vacuum chambers to evaporate water from oil at low temperatures.
- Double-Stage Vacuum Purifiers: These systems feature two vacuum chambers for deep purification and are recommended for high-voltage transformers (>110KV) or severely contaminated oil.
- Portable & Mobile Oil Purifiers: Skid-mounted or trailer-mounted units used for on-site, in-field oil treatment, such as the 2500 LPH to 12000 LPH models listed by oilfiltermachines.com.
- Centrifugal Oil Purifiers: Utilize high-speed spinning force to remove particulates and water, often used for quick cleaning of medium-sized transformers.
- Coalescer and Separator Systems: These systems combine smaller water droplets into larger ones for settling, effective in industrial settings with high water contamination.
Key Features and Performance
- High Water Removal: Modern systems can remove 5 to 15 liters of water per hour.
- Filtration Precision: Many machines filter solid contaminants down to 1–5 microns.
- Automation: Advanced models include automatic temperature control, fluid level sensors, and foam suppression systems to allow unattended operation.
- Oil Regeneration: Some specialized systems include Fuller's Earth filters to reduce acidity and improve color, though this process may remove beneficial additive inhibitors.
Common Technical Specifications
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Web results
Hi-Vac Vacuum Dehydrator Oil Purifiers (HHV Series)
HENEK Manufacturing Inc.
https://www.henekmfg.com › equipment-rentals › product
HENEK Manufacturing Inc.
https://www.henekmfg.com › equipment-rentals › product
Our HHV Series of hi-vac oil purifiers provide high performance purification of insulating oils through dehydration, degasification and filtration processes.Read more
9000L/hr Reliable Transformer Oil Dehydration Machine
assenpe.com
https://www.assenpe.com › 9000-lph-type-transformer-...
assenpe.com
https://www.assenpe.com › 9000-lph-type-transformer-...
DVTP transformer oil dehydration machine is equipped with two-stage vacuum pumping speed and advanced dewatering and degassing system.Read more
4000L/H High Vacuum Transformer Oil Filtration Machine
Acore Filtration Co. Ltd.
https://www.acoreoilpurifier.com › 4000l-h-high-vacuu...
Acore Filtration Co. Ltd.
https://www.acoreoilpurifier.com › 4000l-h-high-vacuu...
DVTP Double Stages High Vacuum Transformer Oil Purification Machine (Oil Purifier) adopts double stages dehydration, degassing chambers and three stages ...Read more
Transformer Oil Purification Systems and Hi-Vacuum ...
High Purity Northwest
https://highpuritynorthwest.com › our-systems › mobile-...
High Purity Northwest
https://highpuritynorthwest.com › our-systems › mobile-...
Our transformer oil filtration and purification systems are designed to thoroughly degas, dehydrate, and filter to quickly restore the dielectric strength ...Read more
6000 LPH Double-stage Vacuum Transformer Oil Dehydration ...
fuootech-oilsolution.com
https://www.fuootech-oilsolution.com › 6000-LPH-Dou...
fuootech-oilsolution.com
https://www.fuootech-oilsolution.com › 6000-LPH-Dou...
As a necessary maintenance equipment for power transformers, it can effectively remove free and soluble water, gases and particulate matters contained in the ...Read more
What transformer oil test equipment is used in substations?
fluidex.us
https://www.fluidex.us › faq › topic › what-transformer...
fluidex.us
https://www.fluidex.us › faq › topic › what-transformer...
Feb 6, 2026 — For filtration and drying, mobile oil processing skids with vacuum dehydration and filtration are used. The exact toolbox depends on asset ...Read more
Transformer Oil Purification System
Vacudyne
https://vacudyne.com › transformer-oil-purifier
Vacudyne
https://vacudyne.com › transformer-oil-purifier
Transformer Oil Purification Machines. Eliminate harmful contaminants from insulating oils and keep your operations running at peak efficiency.Read more
How to selecte the dehydration of transformer oil plant(600LPH)
assenpe.com
https://www.assenpe.com › the-dehydration-of-transfor...
assenpe.com
https://www.assenpe.com › the-dehydration-of-transfor...
May 6, 2023 — This vacuum oil dehydration machine can be used for oil filtration, vacuum drying, and oil injection of transformer equipment. The transformer ...Read more
10 GPM TRANSFORMER OIL PURIFIER
SC Industrial Sales
https://scindustrialsales.com › Rental Equipment
SC Industrial Sales
https://scindustrialsales.com › Rental Equipment
Rent or buy the 10 GPM transformer oil purifier for degassing and dehydrating transformer oil. NEMA 7 rated for safety. Contact us today!
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