transformer oil purification
transformer oil purification machine
transformer oil purification system
transformer oil purification plant
transformer oil purification plant manufacture
Yuneng transformer oil purification
Yuneng transformer oil purification machine
transformer oil purification
transformer oil purification machine
transformer oil purification system
transformer oil purification plant
transformer oil purification plant manufacture
Yuneng transformer oil purification
Yuneng transformer oil purification machine

High Efficiency Double Stage Vacuum Transformer Oil Purification Machine

  1. Vacuum transformer oil purification machine is widely used in electric power, petroleum, chemical and railway fields. When installing and maintaining various large transformer equipment, it can also be used for hot oil circulation drying and oil purification. The transformer oil purification system is suitable for the purification of insulating oil from 110kV to 1000kV voltage.
  2. Compared with the single-stage oil purifier, this machine has additional roots pump pressure system, two high vacuum separation systems and a three-dimensional fast flash evaporation system. It can dehydrate, degas, remove acetylene, remove free carbon, etc. The treated oil has a higher breakdown voltage. This is not only an oil purifier, but also a stand-alone vacuum unit for drying transformer equipment.

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Why is the transformer oil purification machine essential?

  • Transformer oil is the main insulation and cooling medium of oil-immersed transformers. Its dielectric strength and chemical composition directly affect the performance of the transformer. If the oil contains a small amount of moisture and impurities, it will reduce the insulation strength; and the oil is in contact with oxygen, it is easy to oxidize and deteriorate at high temperatures. Therefore, the transformer oil purification machine should be carried out when the transformer is installed.
  • To prevent the deterioration of the oil quality and the impact on the safe operation, the regular oil distribution samples for normal operation should be tested and analyzed, and the oil should be processed according to the analysis results. The inspection cycle of oil chemical supervision for distribution operation is specified to be at least once every three years.


Production Introduction

  • The usage of Yuneng's ZJA transformer oil purification machine improves the dielectric prosperities of your transformer insulation by reconditioning the oil under vacuum dehydration, degasification and filtration.
  • The transformer oil purification plant is used for oil treatmentvacuum oil injection and cyclic hot oil drying in the installation and maintenance of big transformers.
  • It features a high working vacuum, fast oil filtering and sound oil quality protection.


Technical Specification of Transformer Oil Purification Machine

Item Parameter Type Unit ZJA1.8KY ZJA3KY ZJA6KY ZJA9KY ZJA12KY ZJA18KY
Technical parameters Flow capacity L/hr 1800 3000 6000 9000 12000 18000
Ultimate vacuum Pa ≤5
Working vacuum Pa ≤80
Working pressure Mpa ≤0.5
Working oil temperature 45~65
Working noise dB(A) ≤70
Working power kw 380V, 50HZ, 3 phase, 4 wires (or as per request)
Heating power kw 12 30 60 90 120 180
Total electric power kw 15 33 67 102 135 200
Size Length 140 160 187 210 260 260
Width 115 131 125 155 175 175
Height 195 212 220 250 250 250
Inlet and outlet dimension DN 20/20 25/25 32/32 40/40 50/50 65/65
Weight kg 500 600 1200 1600 2200 2600

* The machine size, the weight will change slightly due to different configurations.


Oil Index after Purification

Transformer oil contains 50ppm of water and dielectric strength at 30kV can be improved to the following property:

Residual water content: ≤5ppm

Residual gas content: ≤0.3%

Dielectric strength: ≥ 70kV((spherical pole 2.5mm gap) 

Removable particle size in oil: 1um

Acetylene content: none

Note: Water content, gas content and dielectric content are measured according to relevant GB, DL or IEC, ASTM standards.


Optional Items

  • Outdoor all-weather enclosure
  • Two axles trailer-mounted type
  • Explosion-proof type
  • PLC intelligent control with touch screen operation and operation status dynamic display
  • Inline water content sensor, particle counter, gas content sensor, flow meter, etc
  • Acid reduction system
  • Remote monitoring
  • Customizable design, material and components


Product Images


Founded in 1997,  Chongqing Yuneng Oil-Filter Manufacturing Co., Ltd. is a new and high-tech joint-stock enterprise specialized in R&D, manufacturing, and marketing of turn-key projects in oil purification, water and gas filtration, and other reclamation products. If you have any questions or needs about Yuneng oil purifier, please feel free to contact us.

Project Photos



1. 20,000L/h Transformer Oil Purifier at TBEA Shengyang Factory. 

2. 4320m³/h Vacuum Pumping Unit at the Site of ±800kV Converter Station.

3. 200m³/h Dry Air Generator at the Site of 800kV Qingzhou Converter Station.

4. 1020L/h Precision Oil Purifier and Oiling Machine for Australia Client.

5. 60m³/h SF6 Gas Recovery at the Site of Guangzhou Converter Station.

6. 3 Units of 12000L/h Transformer Oil Purifiers in Pakistan.


Packaging & Shipping

To be packed in iron case or wooden case (s) for long distance (ocean/air) transportation.  



After-Sales Service

● One year guarantee for product quality(People damaged parts are charged).     

● Lifelong maintenance and spare parts supply.

● Free design of fixtures as customers required.

● Free training for machines installation and operation of the staff at factory.