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Time：2025-10-13 13:49:23 Reading volume：
Learn the key types of transformer oil filtration systems — from single-stage vacuum units to full regeneration plants — and how each improves transformer reliability.
Basic dehydration and gas removal.
Use: Routine maintenance of small/medium transformers (≤110 kV).
Advantage: Compact, economical, easy operation.
Deep purification through two vacuum chambers.
Use: Large or high-voltage transformers (≥110 kV).
Advantage: Removes moisture ≤3 ppm restores dielectric strength.
Uses centrifugal force to separate free water and solids.
Use: Industrial or marine oil systems.
Advantage: Fast water removal, no filter elements.
Oil passes through adsorbents such as Fuller’s earth or silica gel.
Use: Aged or deteriorated transformer oil.
Advantage: Removes acids and color bodies, restores oil quality.
Continuous circulation while the transformer remains energized.
Use: Critical substations or remote transformers.
Advantage: Maintains long-term oil cleanliness without shutdown.
Integrates vacuum, filtration, and regeneration functions.
Use: Comprehensive treatment or waste-oil recovery.
Advantage: Produces near-new oil quality, fully automated.
Summary Table
| Type | Main Function | Typical Use |
| -------------------------- | ------------------------| --------------------------- |
| Single-Stage Vacuum | Basic dehydration | ≤110 kV transformers |
| Double-Stage Vacuum | Deep purification | ≥110 kV transformers |
| Centrifugal | Separate free water | Industrial oil |
| Adsorption | Regeneration | Aged oil |
| Online | Continuous filtration | In-service units |
| Combined | Full treatment | Waste-oil recycling |
Sino-NSH provides professional transformer oil filtration and regeneration systems worldwide.
