CMM-4,0LT Transformer Oil Purification Unit

СММ-4,0LT unit is designed for thermal vacuum drying and filtration of industrial oils used in lubrication, sealing, hydraulic control systems of gas turbine and gas pumping units, gas engine compressors, and in transformers. In addition to oil purification, CMM-4,0LT may be used for heating and drying the oil-filled electrical devices.

Principle of operation

The oil driven by vacuum passes through a coarse filter with the filtration fineness of 200 microns after which it gets inside a vacuum tank where a heater is located. Rising from bottom to top, the oil heats up and gets into the other part of the chamber through a special channeled lid coming directly to special fillers. Next, the oil flows down the fillers, while the moisture vapor and gases are removed from the oil by vacuum. Then, the oil is pumped out from the tank bottom through two fine filters to the unit outlet. The filtration fineness of the filters can be selected at 5, 3, 1, or 0.3 microns.

Design features

The heater is located inside the vacuum tank which made it possible to reduce the unit dimensions and to diminish the heat losses while heating the oil.

The oil is sucked into the vacuum chamber due to the underpressure generated by a two-stage vacuum system consisting of a backing pump and a booster pump. A new layout has been applied to the rest of the unit components. All of these innovations have given good results in terms of the small equipment size.

Parameter

Value

1. Capacity, m3/h (gpm), not less than
– in the thermal vacuum drying and filtration mode

4.0 (17,6)

2.* Processed oil parameters (in several passes):
– total gas content, %, not more than

1,5

– oil moisture mass content, g/t (ppm), not more than

10

– industrial purity class of ISO 4406

-/14/12

3. Max output oil temperature, ºС (ºF)

55 (131)

4. Output pressure, bar (psi)

3 (43,5)

5. Oil heater power, kW, not more than

40

6. Max power requirement, kW, not more than

46

7. Electric current parameters
– voltage, V

380

– AC with frequency, Hz

50

– number of phases

3

8. Dimensions, mm (in), not more than
– length

1100 (43)

– width

780 (31)

– height

1470 (58)

9. Weight, kg, not more than

450 (992)

Note:

* At initial parameters of oil:

  • volumetric gas content — not more than 10.5%;
  • moisture mass content — not more than 0.005% (50 ppm);
  • temperature — not lower than 0ºС (32ºF)
  • when the oil passes through the unit multiple times.

  • сompactness;
  • mobility;
  • ease of control;
  • used to purify industrial oils of various types: turbine, hydraulic, compressor, etc.

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