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Time：2025-05-08 10:56:45 Reading volume：
The following are the models and technical features of special oil filters for purifying insulating oil (such as transformer oil, switch oil, etc.), covering efficient solutions of mainstream brands at home and abroad:
1. International brand
- Alfa Laval (Sweden) - Oil Purification Systems
- Model: OPU 40
- Processing capacity: 4000L/h
- Ultimate vacuum: ≤1mbar
- Moisture treatment: ≤5ppm (when the initial ≤100ppm)
- Features: integrated heating (70℃), three-stage vacuum separation, in line with IEC 60422 standards.
- Pall Corporation (USA) - Ellipse series
- Model: Ellipse 200
- Processing capacity: 200L/min
- Filtration accuracy: β≥200 (particles ≤3μm)
- Function: electrostatic adsorption + vacuum dehydration, suitable for ultra-high voltage DC transformer oil.
2. Domestic brands
- Chongqing Tongrui - ZYD series
- Model: ZYD-100
- Processing capacity: 100L/min
- Breakdown voltage increase: ≥70kV (initial ≥30kV)
- Features: double-stage vacuum + molecular sieve adsorption, CE certified.
- China National Machinery Industry Corporation (CMEC) - GZJ series
- Model: GZJ-6000
- Processing capacity: 6000L/h
- Energy consumption: ≤25kW·h/m³
- Application: On-site maintenance of UHV substations.
2. Centrifugal oil filter (high efficiency particle removal/free water)
- Westfalia Separator (Germany) - OSA 60
- Processing capacity: 6000L/h
- Separation factor: Z=12,000
- Application: Large transformer oil particle control (NAS 1638 Class 5).
- GlobeCore (Ukraine) - CMM-4T
- Processing capacity: 4000L/h
- Integrated functions: centrifugal + vacuum + heating, mobile design.
3. Electrostatic oil filter (ultrafine particles/colloid treatment)
- Nikkiso (Japan) - ESU series
- Model: ESU-100
- Processing accuracy: 0.1μm particle removal rate ≥99%
- Application: GIS equipment insulation oil purification.
- Hitech Oil Purification (Germany) - OPU Compact
- Process: centrifugal → vacuum → adsorption → precision filtration
- Output indicators:
- Moisture ≤3ppm
- Gas content ≤0.1%
- Acid value ≤0.01mg KOH/g
| Model | Type | Core function | Processing capacity | Applicable scenarios | Price range (10,000 US dollars) |
|--------------------|------------|----------------------------|----------|-----------------------|------------------|
| Alfa Laval OPU 40 | Vacuum oil filter | Deep dehydration and degassing | 4000L/h | Transformer above 500kV | 15-25 |
| Pall Ellipse 200 | Electrostatic + vacuum | Ultrafine particle removal | 200L/min | HVDC converter station | 8-12 |
| Tongrui ZYD-100 | Two-stage vacuum | Economical insulating oil regeneration | 100L/min | Small and medium-sized distribution transformers | 1.5-3 |
| Westfalia OSA 60 | Centrifugal | Large flow particle/water separation | 6000L/h | Centralized treatment of power plant oil depot | 20-35 |
1. Insulation performance recovery:
- Breakdown voltage: ≥60kV (standard oil cup, ASTM D877)
2. Moisture control:
- New oil standard: ≤10ppm (IEC 60296)
- Regeneration target: ≤15ppm (operating oil)
3. Particle size:
- UHV requirements: ≤NAS 1638 Class 4
- Pretreatment: coarse filtration (≤10μm) to protect equipment.
- Temperature control: heating to 50-65℃ (too high to accelerate oxidation).
- Maintenance:
- ｒｅｐｌａｃｅ vacuum pump oil every 500 hours.
- ｒｅｐｌａｃｅ filter element immediately when the pressure difference > 0.3MPa.
- State Grid Converter Station:
- Equipment: Alfa Laval OPU 40 + Pall Ellipse 200
- Effect: Oil dielectric loss reduced from 4% to 0.5% (90℃).
- European Wind Farm:
- Equipment: GlobeCore CMM-4T Mobile Unit
- Cycle: Treatment every 2 years to extend oil life to 10 years.
Selection requires a comprehensive evaluation based on oil volume, pollution type (water/particles/gas) and budget. For harsh scenarios such as nuclear power, ATEX explosion-proof certified models (such as Pall Ellipse) are preferred.
