Vacuum Transformer Oil Purifiers – Maintaining Transformer Health

What is a Vacuum Transformer Oil Purifier?

A vacuum transformer oil purifier is a specialized equipment designed to remove impurities and contaminants from transformer oil. These impurities, such as water, air, and solid particles, can degrade the oil’s dielectric strength, leading to reduced transformer efficiency and increased risk of electrical breakdown. By effectively purifying the oil, these machines help to extend the lifespan of transformers and improve their overall performance.

Common Uses of Vacuum Transformer Oil Purifiers

• On-site Oil Filtration and Replenishment: These purifiers are used to filter and replenish oil in transformers, oil-filled voltage/current transformers, and high-voltage oil circuit breakers directly at the site.
• Hot Oil Circulation for Drying: Particularly effective for drying oil-filled electrical components like current and voltage transformers.
• Vacuum Injection and Degassing: Suitable for vacuum injection of oil into sealed systems, ensuring no air contamination.
• Regeneration of Lightly Degraded Oil: The equipment can restore the properties of slightly aged oil, making it compliant with industry standards.
• Wide Industry Applications: Commonly used in power plants, substations, metallurgical facilities, petrochemical industries, transportation, and railways.

Key Features of Vacuum Transformer Oil Purifiers

Modern vacuum transformer oil purifiers are equipped with:

• Compact, Portable Design: Facilitates easy mobility and operation.
• Efficient Dehydration and Degassing: Technologies such as large-area 3D flash evaporation improve the removal of water and gases.
• High-Precision Filtration: Multi-stage systems remove even microscopic impurities, ensuring clean oil.
• Automated Safety Features: Includes pressure alarms, overload protection, and temperature control for safe, uninterrupted operation.
• Advanced Heating Systems: Uniform and rapid heating prevents oil degradation.

Working Principle of Vacuum Transformer Oil Purifiers

The operation of a vacuum transformer oil purifier is based on the differences in boiling points between oil and water. Its process includes the following stages:

• Rough Filtration: Oil is initially passed through coarse filters to remove large particles.
• Heating: The oil is heated to temperatures between 45–65°C, facilitating the evaporation of water.
• Vacuum Separation: A vacuum pump reduces the pressure, causing water and gases to vaporize. These are condensed and removed in a separate chamber.
• Fine Filtration: The purified oil is subjected to precision filtration, removing any remaining impurities before being discharged.

How to Choose the Right Vacuum Transformer Oil Purifier

Selecting the right vacuum transformer oil purifier or high vacuum oil purifier is critical to achieving efficient oil purification. Here’s a detailed guide:

1. Determine Requirements

• Assess the volume of oil that needs purification.
• For oil volumes under 1 ton, a machine with a flow rate of 30L/min is sufficient. For larger systems, such as oil tanks over 20 tons, opt for machines with a flow rate of 200L/min or higher.

2. Evaluate Essential Features

• Dehydration and Degassing Efficiency: Machines using 3D flash evaporation provide faster and more thorough removal of contaminants.
• Filtering Precision: Multistage filtration with durable materials ensures a high degree of cleanliness.
• Automation Level: Features like automatic pressure alarms and overload protection make the operation safer and easier.
• Heating Performance: A high-efficiency heating system ensures uniform temperature control, minimizing oil degradation.
• Additional Functions: Some purifiers also support vacuum pumping and oil injection, providing extra versatility.

3. Consider Optional Configurations

• PLC Control and Touch Screens: Enables advanced monitoring and operation.
• High-Quality Components: Opt for imported filters and pumps for enhanced durability.
• Adjustable Flow Rates: Variable frequency drives allow customization to specific needs.

4. Structural Considerations

• Mobility Options: Choose from mobile, stationary, or semi-trailer models depending on your operational requirements.
• Environmental Adaptations: Options like fully enclosed or canopy-protected units are available for outdoor use.

Yuneng ZJA Double-Stage Transformer Oil Purification Machines

One of the leading solutions in this field is the Yuneng ZJA series of double-stage transformer oil filtration machines. These high vacuum oil purifiers are equipped with state-of-the-art features:

Item	Parameter		Type Unit	ZJA1.8KY	ZJA3KY	ZJA6KY	ZJA9KY	ZJA12KY	ZJA18KY
Technical Parameter	Flow Rate		L/H	1800	3000	6000	9000	12000	18000
	Working Vacuity		Pa	≤80
	Working Pressure		Mpa	≤0.35
	Temperature Range		oC	45-65
	Power Supply			50Hz    380V    3-Phase 4-Wire  (or as requested)
	Total Power		KW	16	36	70	100	150	200
	Inlet/Outlet Diameter		DN	20/20	25/25	32/32	40/40	50/50	65/65
	Size	Length	cm	160	180	220	250	280	345
		Width	cm	125	145	160	195	215	260
		Height	cm	200	220	245	270	300	300
	Weight		Kg	650	900	1200	1600	2200	3000

Maintaining transformer oil quality is crucial for the performance and safety of electrical equipment. A vacuum transformer oil purifier, particularly a high vacuum oil purifier, is an indispensable tool in achieving this. By removing water, gases, and impurities, these machines extend the life of transformer oil and enhance system reliability.

When choosing the right purifier, consider factors like oil volume, machine features, and operational needs. Products like the Yuneng ZJA series demonstrate how advanced technology can meet industry demands efficiently. Investing in a high-quality vacuum transformer oil purifier is a step toward safeguarding the integrity of electrical systems and ensuring long-term cost efficiency.