Transformer Oil Filtration Machine – FLD 8.8D

• Description

  The FLD 8.8D oil filtration machine is recognized for treatment of dielectric oil with a mass  moisture content of 50 ppm and a volumetric dissolved gas content of approx. 10 % before being treated.

  Parameters of the treated oil after one pass through the machine:

  • Maximum temperature – 80 °C;
  • moisture content — between 10 and 5 ppm;
  • dissolved gas content – approximately 0.1 % (or less) by volume;
  • breakdown voltage — above 75 kV.

  Under the same conditions, oil with a moisture content of 20 ppm will leave the system, indicating 3 (or less) ppm after one pass.

  The above values are achieved with oils having a 10–2 mbar distillation curve at a temperature of 80 °C.

  Principle of operation

  The dielectric fluid enters the system through an inlet mesh filter, and then flows through an inlet oil pump into an oil heating assembly, where it is heated by immersion heaters. After fine filtration by cartridge filters, the dielectric fluid is sprayed into a vacuum chamber on a basket of Raschig rings. Finally, after the contaminants are removed, the purified fluid leaves the system through an outlet oil pump.

• Specification

  No.	Parameter	Value
  1	Nominal capacity for oil treatment, gpm (L/h)	8.8 (2,000)
  2	Maximum total heating power, kW	31
  3	Maximum total power, kW	36
  4	Number of heater sections	2
  5	Maximum power of one heating element, kW	1.7
  6	Filtration (through cartridges in rated operating mode), µm	≤1
  7	Number of filtration stages	2
  8	Number of cartridges per stage	1 (one)
  9	Filter clogging control	Pressure indicators
  10	Operating vacuum, psi (MPa)	-8.7 ̴ 14.35 (-0.06 ̴ 0.099)
  11	Operating pressure, psi (MPa)	≤72.5 (≤0.5)
  12	Temperature range, ºF (ºС)	68 ̴ 176 (20 ̴ 80)
  13	Power supply parameters	Any options upon customer’s request
  14	Dimensions (without a trailer), in (mm)
  	– length	102 (2,600)
  	– height	49 (1,250)
  	– width	59 (1,500)
  15	Weight (without a trailer), lbs (kg)	2,205 (1,000)

• Advantages

  The Fluidex vacuum oil purifier offers several key advantages. First and foremost, it increases the dielectric strength of transformer oil to at least 75 kV, ensuring superior insulation performance and reliability. Furthermore, the system facilitates the simultaneous drying of transformers while treating the oil, thereby enhancing the overall efficiency of maintenance activities. This equipment is also effective in the initial filling of electrical apparatus with insulating oil, providing a clean and contaminant-free medium for optimal functioning. It also allows for  evacuation of transformers and other electrical equipment, ensuring the removal of moisture and air to prevent dielectric breakdowns. The system is designed for simple operation and maintenance, ensuring ease of use and long-term cost effectiveness.

• Application

  The FLD 8.8D oil purifiers with a two-stage vacuum system can be applied in the power sector and other industries for filtration, dehydration, and deep degassing of the following types of dielectric fluids:

  • transformer oils;
  • silicone oils;
  • Midel 7131 dielectric fluids;
  • FR3 fluids.

  Additionally, the FLD 8.8D oil purifiers can be used for heating of transformer oil, filling the oil into a transformer under vacuum, or for vacuumizing of transformers.