Vacuum Oil Purifier – Low-Temperature Dehydration and Degassing for Industrial Oil Regeneration

Product Overview

Vacuum oil purifier is a professional oil treatment system designed for aged, emulsified, 

and contaminated industrial oils including lubricating oil, hydraulic oil, and transformer oil. 

Unlike conventional filter machines that only remove solid particles, this equipment uses

 low-temperature vacuum distillation technology to extract emulsified water, dissolved water,

micro-bubbles, and oxidation sludge from oil. It restores oil viscosity, dielectric strength, 

and cleanliness — regenerating the oil rather than simply filtering it. As a key auxiliary equipment,

 it helps industrial facilities reduce new oil purchases and prevent production losses caused

 by out-of-spec oil quality.

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Working Principle

The vacuum oil purifier performs deep cleaning through a systematic multi-stage process:

First stage – Pre-filtration: Contaminated oil passes through a precision pre-filter that removes

 large particles, rust, and mechanical debris, protecting the downstream vacuum system from 

abrasive damage.

Second stage – Heating and vacuum separation: The pre-filtered oil enters a heating chamber

 and then flows into the vacuum separation vessel. Under stable negative pressure, the boiling

 point of water decreases, allowing moisture and gases to evaporate at low temperatures without

 degrading oil additives or causing thermal cracking.

Third stage – Fine filtration: After dehydration and degassing, the oil passes through fine filter 

elements to remove remaining sub-micron suspended contaminants.

Final stage – Clean oil output: Purified oil is discharged for reuse, while separated water and 

gases are independently exhausted.

The entire process is purely physical, requiring no chemical additives and producing no 

secondary contamination.

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Core Advantages

Feature Benefit

Deep dehydration and degassing Removes emulsified and dissolved water that ordinary filters

 cannot handle; solves oil emulsification, foaming, and insulation loss

Low-temperature operation Prevents thermal cracking and oxidation; extends oil service life by 

more than three times

Continuous online or offline operation Operates 24/7; connects to storage tanks or circulating 

pipelines for automatic duty

Intelligent monitoring Tracks oil temperature, vacuum level, and contamination status in real time;

 supports unattended operation

Energy-efficient and robust Compact design, stable performance, 

low power draw; suitable for heavy industrial use

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Technical Parameters

Parameter Specification

Applicable fluids Hydraulic oil, turbine oil, transformer oil, lubricating oil

Flow capacity Multiple ratings available (customizable)

Operating temperature Low-temperature design (additive-safe)

Vacuum level Stable negative pressure maintained throughout process

Filtration stages Pre-filtration + vacuum separation + fine filtration

Construction Industrial pressure vessel design

Optional features Explosion-proof configuration, automatic drainage, data logging, remote 

monitoring

All parameters can be adjusted per site conditions. Custom flow ratings, 

mounting types (mobile or fixed), and control modes are available.

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Application Scope

Industry Applications

Power generation Transformer oil purification and insulation restoration; turbine oil maintenance

Heavy industry & manufacturing Hydraulic oil and lubricating oil circulation; sludge and emulsion 

removal

Metallurgy & chemical Oil regeneration for continuous process equipment

Construction & mining Emergency oil treatment and regular maintenance for mobile equipment

Waste oil recovery Full-scale oil regeneration projects

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Customization Options

We offer tailored solutions based on the customer's actual contamination level, daily throughput, 

and site conditions:

· Flow capacity: selectable from standard ratings

· Explosion-proof rating: optional for hazardous areas

· Control system: manual / semi-auto / fully automatic with remote monitoring

· Mounting: stationary skid or mobile trailer type

· Additional systems: differential pressure alarms, online oil quality sensors, data acquisition

All supporting filter elements and spare parts are available for long-term maintenance support.

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Frequently Asked Questions

Q1: What types of oil can this equipment handle?

A1: It is suitable for transformer oil, turbine oil, hydraulic oil, lubricating oil, and most other 

industrial mineral oils.

Q2: Can the vacuum purifier completely resolve oil emulsification?

A2: Yes. The vacuum separation process effectively removes both emulsified water and dissolved 

water, eliminating milky appearance and restoring oil clarity and properties.

Q3: Does the purification process damage oil additives?

A3: No. Low-temperature vacuum distillation is a purely physical process. It removes volatile 

contaminants only, leaving base oil and additive components intact.

Q4: How long does it take to process a batch of oil?

A4: Processing time depends on oil volume, contamination level, and unit flow rate.

 Typically, standard hydraulic oil can be circulated 2–3 times to reach target cleanliness 

and water content.

Q5: How often should the filter elements be replaced?

A5: Replacement frequency depends on incoming contamination load. Generally, pre-filter 

elements are changed more frequently (when differential pressure rises above 0.1–0.15 MPa), 

while fine filter elements follow the same rule. A built-in pressure gauge provides a visual indicator.

Q6: Can the unit operate continuously without supervision?

A6: Yes. With intelligent monitoring and alarms, the system can run unattended for extended 

periods. It automatically stops or alerts on abnormal temperature, pressure, or vacuum conditions.

Q7: What utilities are required for installation?

A7: Standard electrical power, a clean water supply for cooling (for certain models),

 and a vent connection for extracted gases/vapors.

Q8: What documentation is provided?

A8: Each unit ships with a factory test report, operating manual, electrical schematics, 

and compliance certificates (CE or local equivalent as applicable). EN 10204 material 

certificates for pressure components are available upon request.

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Solutions Overview

Our vacuum oil purifiers offer stable performance, high purification efficiency,

 and low operating costs — providing a complete industrial oil regeneration and maintenance 

solution. Whether you need routine circulating purification, emergency oil restoration, 

or large-scale waste oil regeneration, we can recommend the right configuration and support 

you through installation, commissioning, and ongoing maintenance.

Contact our technical team for equipment datasheets, case studies, and project-specific 

quotations.

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Summary

The vacuum oil purifier is a low-temperature physical separation system that removes water, 

gas, and solid contaminants from industrial oils — extending oil life, protecting equipment, 

and reducing operating costs. Available in multiple flow ratings with full customization options,

 it is designed for continuous use in power plants, manufacturing facilities, and heavy industry 

applications.