High Vacuum Transformer Oil Filtration Equipment

PureTech High Vacuum Transformer Oil Filtration Equipment is designed to perform the functions of power transformer oil filtration, dehydration and degassing.

In order to better handle electrical stresses, an high vacuum transformer oil filtration equipment is used to reduce moisture content, gas content as well as impurities content. Thereby, the dielectric strength of used transformer oil can be maintained or recovered, meanwhile the speed of transformer oil aging is reduced.

For new transformer oil being filled into power transformers, transformer oil filtration procedure is still essential. Due to the storage environment and transportation, it inevitably get mixed up with air, moisture and impurities, must be filtrated and dehydrated before filling into transformers.

Transformer Oil Filtration Performance

• Moisture content shall be decreased to below 5 ppm according to IEC 60814 or ASTM D1533 standards.

• Gas content shall be reduced down to below 0.1% according to the IEC 60567 or ASTM D2945 standard.

• Three stages of filter cartridges to reduce the particles over 1 micron in the oil.

• Dielectric strength of transformer oil shall be improved above 75KV.

Transformer Oil Filtration Procedure

1. Connect the oil hose and power supply.

2. Start vacuum pump system, there will be negative pressure formed inside the transformer oil filtration equipment. Transformer oil to be filtrated will be sucked into the oil filtration unit.

(Optional oil inlet pump can be used for long distance oil pumping)

3. Transformer oil will firstly pass through the 1^st primary filter to remove large-size mechanical particles from oil, this can protect the oil pump from being damaged by the impurities.

4. After 1st stage filtration, the transformer oil will be heated by an electrical heater. Transformer oil will be heated to a set temperature (usually 60 ℃), a thermostat will ensure uniform heating and avoid local overheating.

5. Heated transformer oil will flow into the vacuum degassing chamber for vacuum dehydration and degassing. The specially designed  "T"-shape vacuum chamber maximize the evaportation area of transformer oil. Transformer oil is spewed out at high speed through several small nozzles, forming oil mist inside the vacuum chamber.

6. After vacuum dehydration and degassing, the transformer oil is pumping out through an oil outlet pump.

7. The 2^nd and 3^rd fine filters will remove the small particles and impurities from transformer oil, to keep the cleanliness of oil. The filter fineness can reach up to 1 micron.

8. Moisture and gases separated from transformer oil will be cooled into a liquid state or discharged.

9. The purified transformer oil will be pumped out of the transformer oil filtration equipment.

10. Online oil testing instruments are recommended for real-time monitoring of the oil characteristics and oil filtration process.

6.

Transformer Oil Filtration Technical Parameters

Machine Parameter	Item		Unit	DVOP-30	DVOP-50	DVOP-75	DVOP-100	DVOP-150	DVOP-200	DVOP-300
	Flow rate		liters/hour	1800	3000	4500	6000	9000	12000	18000
	Vacuum degree		Mpa	(-0.08) ~ (-0.099)
	Working pressure		Mpa	≤ 0.3
	Temperature range		℃	40 ~ 80
	Power supply			380Volts, 50Hz, 3Phase (Note: Power supply can be customized according to your local power.)
	Heating power		kw	24	30	48	60	90	120	130
	Total power		kw	26	34	54	68	100	135	146
	Inlet/outlet diameter		mm	32	32	44	44	50	58	65
	Size	Length	mm	1250	1350	1550	1800	2000	2100	2300
		Width	mm	900	1000	1150	1400	1750	1850	2000
		Height	mm	1450	1500	1700	1750	1800	2250	2300
	Weight		kg	500	600	800	1100	1300	1900	2300
Oil index after purification	Breakdown voltage		kV	≥75 (Spherical electrodes)
	Water content		ppm	≤5
	Gas content		%	≤0.1
	Filtering accuracy		micron	1

* Please inquire us for other flow rates or types.

* The machine size and weight will change slightly due to different configurations.The machine size and weight will change slightly due to different configurations.

• Optional Parts provided for selection:

a) Fully automatic operation of the unit with PLC control, controlled by easy user interface. Touch panel for easy operation placed on the electrical cabinet.

b) Digital oil flow meter (oil flow counter) to display both the total flow and instantaneous flow.

c) Digital moisture content meter (hygrometer) to keep testing the ppm of electrical transformer oil.

d) Transformer evacuation function can be integrated into this oil filtration plant if required.

e) Mobile trailer and weather-proof canopy is recommended for outdoor service.

f) Other specific requirements if you have, we accept tailored options.

Successful Projects on Transformer Oil Filtration

Our After-Sales Service for You

• 12 months of quality guarantee.

• Lifelong maintenance and spare parts supply.

• Free training on operation, maintenance and troubleshooting at PureTech factory.

• Puretech engineers go to customer site for commissioning and training (payable service).

• Design accept user's customization.