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OilPure Vacuum Jet Dehydration

Vacuum Jet Dehydration technology , developed by OilPure Technologies, Inc., is designed to remove dissolved and free water from industrial lubricating oils. This is the latest technology in water dehydration from lubricating oil which can provide a lower cost capacity of removing water down to 10 ppm in hydraulic oil, turbine oil, quenching oil, cutting oil, and other oils etc.

Vacuum Jet Dehydrator utilizes the atmospheric air to absorb dissolved water from oil.  Oil & dissolved water mixture is heated to 145 °F to 160 °F by an immersion heater and pressurized through OilPure's proprietary jet eductor.  This causes atmospheric air to mix with oil.


  • Removes dissolved and free water from over 10,000 ppm (1%) down to less than 50 ppm (0.005%).
  • Removes dissolved water from 350 cc up to 3 quarts per hour.
  • Low cost water dehydration (40% to 70% less cost than conventional vacuum distillation)
  • Low oil heating temperature from 145 °F  to 160 °F
  • Capable of dehydrating high viscosity oil from 3,000 SUS.
  • Maintenance free operation. No expensive vacuum pump replacement cost.


Air and oil mixing action turns fluid into aerosol in a special designed  cyclonic separating tank.  At the right temperature any air (even humid air) will absorb moisture from the oil and cause water to change from liquid state in the oil into a vapor state.  The cyclonic forced air will carry dissolved water to the steam above and allow dried oil to fall to the bottom.


OilPure VS Conventional Vacuum Distillation

Conventional vacuum distillation works on the principle that water boils at 170 °F under 29 inch Hg. vacuum, rather than 212 °F at atmospheric sea level. Dissolved water vaporizes from the vacuum chamber and is drawn into the condenser which turns vapor into water droplets. Vacuum distillation uses an expensive, high maintenance vacuum pump to draw moisture vapor from wet oil.

Water Removal Tests Between
OilPure Vacuum Jet Dehydration and Conventional Vacuum Distillation

Water Removal Tests
OilPure Vacuum Jet Dehydrator *
Conventional Vacuum Distillation
Water content before dehydration
10,000 ppm
10,000 ppm
First pass of dehydration 
4,500 ppm
8,000 ppm
Second pass of dehydration
1,500 ppm
5,000 ppm
Third pass of dehydration
120 ppm
2,000 ppm
Forth pass of dehydration
40 ppm
150 ppm
Fifth pass of dehydration
10 ppm
30 ppm
Sixth pass of dehydration
8 ppm
5 ppm

Note * Test results obtained by OilPure lab based on the 70 oil samples tested.


Advantages of OilPure Vacuum Jet Dehydration over Vacuum Distillation

  • Vacuum jet dehydration can remove twice the amount of water from 10,000 ppm down to 100 ppm in the third pass, as compared to vacuum distillation. Vacuum Jet dehydration uses the cyclonic pressurized air force to increase the output of water vapor while the vacuum distillation uses a vacuum pump to draw vapor out of vacuum chamber.
  • Cost is about 1/2 or 2/3  less than that of a conventional vacuum distillation unit.

Oil Applications

Hydraulic oil, quenching oil, lube oils, vacuum oil, cutting oil, turbine oil, transmission oil, grinding oil, honing oil, phosphate ester, rust preventing oil, rolling oil etc.


There three different types of Vacuum Jet Dehydrators:

  • Dedicated Water Dehydration Unit to continuously remove dissolved and free water while your equipment is running. This system works well when water content is up to 3% to 5% in the oil reservoir.


  • Automatic Water Drainage Dehydration System to continuously remove dissolved water by vacuum jet and free water is automatically drained with water sensor device. This system can remove both free water and dissolved water while your equipment is running. This system works well when water content is higher that 5% to 75% in oil reservoir or when water keeps continuously leaking into your equipment lubricating system.


  • Completed Water Removal System The equipment will be shut down for 10 to 15 minutes so oil and water can be completely removed from oil reservoir. The clean oil is replacing in the oil reservoir. This will allow the dirty oil to be dehydrated and filtered which is stored in the clean oil tank for the next clean oil replacing.


Ther are 3 groups of Vacuum Jet Dehydrator.

  • Small Vacuum Jet Dehydrator  Both VJ-50 and VJ-100 uses the single phase power source such as 110V-1ph or 220V-1ph because it uses less heat to warm the oil to 145 °F for dehydration.

Model: VJ-50 for oil reservoir size up to 50 gallons with 300 cc or 10 oz of water * removal per hour and 3 GPM flow capacity.

Model: VJ-100 for oil reservoir size up to 100 gallons with 600 cc or 20 oz of water * removal per hour and 5 GPM flow capacity.

Medium Vacuum Jet Dehydrator

Model: VJ-150 for oil reservoir size up to 300 gallons with 1 liter or 1 quart of water * removal per hour and 7 GPM flow capacity.

Model: VJ-300 for oil reservoir size up to 600 gallons with 2 liters or 2 quarts of water * removal per hour and 10 GPM flow capacity.

Large Vacuum Jet Dehydrator

Model: VJ-450 for oil reservoir size up to 900 gallons with 3 liters or 3 quarts of water * removal per hour and 15 GPM flow capacity.

Model: VJ-600 for oil reservoir size up to 1200 gallons with 4 liters or 4 quarts of water * removal per hour and 20 GPM flow capacity.

* Note: This estimated water removal rate will be vary depending on oil viscosity and degree of water emulsification .

How to figure out Vacuum Jet Dehydrator size ?

OilPure does not use oil flow rate to determine filter size as commonly uses in conventional vacuum distillation. Typical vacuum distillation always uses oil flow rate to determine the size of water removal. 
Oil Pure Vacuum Jet Dehydrator uses the oil reservoir size and the estimated water ingression rate to determine the proper vacuum jet dehydrator model.

For an example :  For hydraulic oil reservoir size 50 gallons with 3% water content (or 1.5 gallons), we recommend to use vacuum jet dehydrator model: VJ-50 which has about 1/3 quart of water removal per hour capacity. 
So the dried clean oil turnover rate is in every 24 hours (1.5 gal divided by 1/3 qt per hr = 18 hrs x 30% safety factor = about 24 hrs).