Vacuum oil-purifier series for dehydration, degasification and filtering of insulating oil
Drying and degassing transformer oil without repeated passes takes a high-vacuum purifier that removes water, dissolved gases and particles in a single run through the vacuum chamber. The AEHV does it with glass-fibre accelerator cartridges: with oil at 27 °C or more, water falls from 50 ppm to below 5 ppm and dissolved air from about 12 % of saturation to below 0.25 %, with a 0.5 µm after-filter, across nine models from 200 to 12 000 l/h that run unattended, even on energized equipment.
AEHV key data
- Treatment performance: the AEHV reduces water from 50 ppm to below 5 ppm and dissolved air from about 12 % of saturation to below 0.25 % in a single pass, at a minimum oil temperature of 27 °C.
- Filtration: standard 0.5 µm after-filter, optional 5 µm pre-filter and optional Fullers Earth filters (E575A series) for oxidation products, varnishes, paints and acids.
- Range: nine models, from AEHV 200 to AEHV 12000, with flows from 200 to 12 000 l/h, suggested oil treatment masses from 850 to 60 000 kg and total power from 6 to 225 kW.
- Vacuum: vacuum pump of 25 to 600 m³/h, or 150 to 4 500 m³/h with the 'VB' Roots booster option; the accelerator cartridges expose the oil to the vacuum over 3-10 µm glass fibres.
- Heating: low watt density heaters from 3 kW (AEHV 200) to 192 kW (AEHV 12000) for a 25 °C rise, with outlet heater and diesel or gas boiler as options.
- Control: PLC control, IP52 central control panel, oil level and foam controllers, TEFC motors and unattended operation suitable for energized equipment.
- Power supply: from 110 V single-phase to 575 V three-phase, at 50 or 60 Hz according to the model code.
- Mounting: skid, cargo trailer, open-sided container or semi-trailer up to 16 m, with EEx or NEMA 7 explosion-proof execution and a full stainless steel option.
Advantages
One pass instead of several
Accelerator cartridges in the vacuum chamber coalesce free water, expose a thin oil film to the vacuum over millions of 3-10 µm glass fibres and release gases quickly — where spray-and-baffle designs needed several passes.
Measured performance
From 27 °C of oil temperature, water falls from 50 ppm to below 5 ppm and dissolved air from about 12 % of saturation to below 0.25 %, with a standard 0.5 µm after-filter.
A size for every job
Nine models cover 200 to 12 000 l/h, with suggested oil treatment masses from 850 to 60 000 kg and Roots booster options up to 4 500 m³/h of vacuum capacity.
Designed to work alone
The series is designed for unattended operation and is suitable for work on energized equipment; complete monitoring equipment is available.
Beyond water and gas
Optional Fullers Earth filters remove oil oxidation products, thermal degradation products, dissolved varnishes, paints and acids.
Applications
- Degasification of transformer oil in extra-high-voltage transmission.
- Manufacture of electrical apparatus.
- Cable oils, including polybutenes.
- Oils for radar and electronic equipment, vacuum-pump sealing oils, brake fluids and refrigeration oils, including phosphate esters and silicones.
About the product
Each AEHV is built to order — skid, cargo-trailer, container or semi-trailer mounting up to 16 m — and accepts options such as extra heater capacity, an outlet heater, a diesel or gas boiler, an on-board generator, a Fullers Earth system (E575A series), an inline dielectric tester or RGA, a touchscreen MMI, remote monitoring with wireless emergency dial-out, TOLMS oil-level monitoring, explosion-proof EEx or NEMA 7 execution and a full stainless steel option.
Technical specifications
| Dehydration | Water from 50 ppm to below 5 ppm at 27 °C or more |
| Degasification | Dissolved air from about 12 % of saturation to below 0.25 % |
| Filtration | Standard after-filter of 0.5 µm |
| Oil flow | 200 to 12 000 l/h in nine models |
| Vacuum pump | 25 to 600 m³/h; 150 to 4 500 m³/h with Roots booster ('VB') |
| Total power | 6 to 225 kW depending on the model |
| Suggested oil treatment mass | 850 to 60 000 kg |
| Dimensions | From 1120 × 960 × 1580 mm to 4000 × 2000 × 2200 mm |
| Weight | 685 to 5000 kg |
| Operation | Unattended; suitable for energized equipment |
| Heater (25 °C rise) | 3 to 192 kW depending on the model |
| Standard configuration | PLC control; IP52 control panel; oil level and foam controllers; TEFC motors |
| Electrical input | 110 V single-phase to 575 V three-phase, 50 or 60 Hz, according to the model code |
Frequently asked questions
How much heating power does each AEHV have?
From 3 kW on the AEHV 200 to 192 kW on the AEHV 12000, sized for a 25 °C rise in oil temperature; the AEHV dehydration performance, from 50 ppm to below 5 ppm of water, is reached with oil at 27 °C or more. Extra heater capacity, an outlet heater and a diesel or gas boiler are available as options.
What does the AEHV include as standard, and which instruments can be added?
As standard, the AEHV comes with PLC control, an IP52 central control panel, oil level and foam controllers, TEFC motors, mechanical seal oil pumps, welded steel piping and a 0.5 µm after-filter. Options include a 5 µm pre-filter, an electronic flow meter or totaliser, an outlet or inlet-and-outlet hygrometer, a vacuum controller and Viton gaskets.
How is the right model chosen?
By oil volume and required throughput: the nine models cover 200 to 12 000 l/h, with suggested oil treatment masses from 850 to 60 000 kg.
Does it work on an energized transformer?
Yes. The series is designed for unattended operation and is suitable for work on energized equipment, with complete monitoring available.
What do the accelerator cartridges do?
They coalesce free water before evaporation, expose the oil film to the vacuum, speed up gas release and act as a fine filter; they are disposable and easy to replace.
Can it remove acids and varnishes as well?
Yes, with the optional Fullers Earth filters, which remove oxidation products, thermal degradation products, dissolved varnishes, paints and acids.
How is it transported?
To suit the site: skid, cargo trailer, open-side container or aluminium semi-trailer up to 16 m, among other configurations.
