FRIESS vacuum oil purifiers and VOD oil-dehydration systems remove free, emulsified and dissolved water, gases and particles from hydraulic, lubricating, turbine and transformer oils. They can reduce residual water content to below 50 ppm, extending oil life and helping prevent equipment failures.
Water accumulated in oil generally occurs in two forms: free water and emulsified water.
Emulsified water is bound within the oil because the fluid can hold a certain amount of moisture in suspension. Once water is emulsified, ordinary mechanical separation can no longer remove it reliably. A vacuum oil-dehydration system is then the dependable solution for deep drying.
Rental option: To help you verify the performance of a FRIESS VOD vacuum oil purifier under your own operating conditions, rental trials are available.
Free water appears only after the oil is saturated and can no longer bind additional moisture. It then settles at the bottom of the tank and may be carried through the system as small droplets when the pump circulates the oil. These unbound droplets can be removed by suitable filtration or separation methods.
Advantages at a glance:
Deep oil dehydration using vacuum technology, reducing residual water content to below 50 ppm.
FRIESS VOD vacuum oil purifiers are designed for applications including:
Free water exists as droplets and can often be removed by settling or conventional filtration. Emulsified water is bound within the oil and cannot be removed by ordinary filters; vacuum dehydration is required. FRIESS VOD systems handle both conditions.
A conventional filter removes solid particles but cannot remove water dissolved in the oil. A vacuum oil purifier heats the oil under vacuum so that moisture evaporates and is separated, allowing emulsified water to be removed and residual water content to be reduced to below 50 ppm.
Typical indicators include cloudy or milky oil, an oil-analysis result above 500 ppm water, unusual system noise or unstable pressure, and corrosion on metal components.
Treatment time depends on the oil volume and degree of contamination. As a guide, approximately 1,000 litres of moderately contaminated hydraulic oil normally require 8–24 hours.
Yes. FRIESS offers rental trials so the performance can be verified before purchase. Up to two months of rental fees may be credited toward the final purchase price.
The water evaporated during vacuum dehydration is condensed and collected. It is clean water without oil contamination and can be discharged in accordance with local requirements.
In addition to reducing operating costs, FRIESS oil skimmers, electrostatic oil cleaners, magnetic filters, coolant purification systems, oil-water separators and vacuum oil purifiers provide many further benefits.
We will be pleased to explain how these solutions can improve your process.
