What is the filtration rate per liter of transformer oil?

The filtration rate of transformer oil is usually expressed in filtration accuracy (in microns, μm) rather than "filtration rate per liter". The standard filtration accuracy depends on the degree of oil contamination and the performance of the filtration equipment. The following are the key parameters:

1. Filtration accuracy range

- General treatment: 1~10 μm (removal of particulate impurities, moisture, etc.).

- High-precision treatment: can reach below 0.5 μm (such as vacuum oil filter or special working conditions).

2. Factors affecting oil filtration efficiency

- Equipment type: centrifugal oil filter, plate and frame pressure oil filter, vacuum oil filter, etc. have different efficiencies.

Oil quality: The initial water content and particulate matter content (such as NAS grade) affect the processing speed.

- Flow rate: usually expressed in liters/hour (L/h) or cubic meters/hour (m³/h), for example, the flow rate of a small oil filter may be 1,000 L/h.

3. Practical application reference

- If the question refers to "how many liters filtered per hour", it needs to be calculated based on the nominal flow rate of the equipment (e.g. 1,000 L/h means filtering 1,000 liters per hour).

- If it refers to "cleanliness after filtration", it is necessary to refer to ISO 4406 or NAS 1638 standards, for example, the treated oil can reach NAS Class 6 (limit of particles per 100 ml).

Recommendation: Provide more specific requirements (such as equipment model, target cleanliness, or flow rate) to provide accurate data. Transformer oil filtration needs to be comprehensively evaluated in combination with indicators such as moisture content and gas content.