The following are the main types of equipment used to filter transformer oil, each designed for different purification needs (such as water removal, impurity removal, and degassing):

1. Vacuum Oil Filter (Most Commonly Used)

- Function: Efficient dehydration, degassing, and impurity filtration

- Applicable Oils: Transformer Oil (Insulating Oil), Turbine Oil, etc.

- Features:

- Removes moisture and gases through vacuum evaporation and precision filtration

- Filtration accuracy of 1-5 microns

- Typical Models: ZJB Series, LY Series

2. Plate and Frame Oil Filter

- Function: Primarily filters solid particles and mechanical impurities

- Applicable Scenario: Initial purification of transformer oil or heavily contaminated oil

- Features:

- Simple structure and low cost

- Requires frequent filter paper/cloth replacement

- Filtration accuracy of 10-30 microns

3. Centrifugal Oil Filter

- Function: Separates moisture and mechanical impurities

- Applicable for: Transformer oil with high water content

- Features:

- Uses centrifugal force to separate impurities, eliminating the need for a filter element

- However, its effectiveness against dissolved water and gases is limited

4. Coalescing and Separating Oil Filter

- Function: Deep dehydration (free water, emulsified water)

- Applicable for: Severely emulsified transformer oil

- Features:

- Uses a coalescing material to coalesce and separate small water droplets

- Often used in conjunction with a vacuum oil filter

5. Electrostatic Oil Filter

- Function: Removes tiny particles (submicron level)

- Applicable for: Precision purification of ultra-high voltage transformer oil

- Features:

- Uses an electrostatic field to adsorb particles

- However, it is ineffective against water

6. Multi-Function All-in-One

- Function: Combines vacuum, filtration, and heating functions

- Typical Models:

- Two-Stage Vacuum Oil Filter (Dehydration + Degassing + Filtration)

- Regeneration Oil Purifier (Purifies Aged Oil and Restores Acidity)

Selection Recommendations

- Mild contamination: Plate and frame oil filter or standard vacuum oil filter

- Severe water/gas content: Two-stage vacuum oil filter

- Emulsified oil: Coalescing separation + vacuum combination

- Ultra-high precision: Electrostatic oil filter (requires integration with other equipment)

For specific model recommendations, please provide the oil condition (water content, impurities, etc.) and flow rate requirements.