ELIMFILTERS Canonical Knowledge · Approved
DEWATIS Oil Dehydration and Water Removal
Engineering Reference · Industrial & Process
Platform: FLUREXIS™
Technology: DEWATIS™
Engineering Relationships
- DEWATIS™ addresses water contamination in hydraulic and lubricating oils.
- Free, emulsified and dissolved water can require different removal mechanisms.
- Vacuum dehydration is a mass-transfer treatment that can address free and dissolved water when the fluid and application are suitable.
- Oil chemistry, viscosity, temperature, water loading and recirculation conditions affect treatment duty.
- Water ingress must be identified because treatment alone does not prevent recurrence.
- Moisture results should be compared using representative sampling and an appropriate test method.
- DEWATIS™ maps to TC-OIL-01 within FLUREXIS™.
Components
- Water-removal or dehydration unit
- Vacuum chamber or other validated separation stage where applicable
- Recirculation pump and offline loop
- Particulate prefilter or polishing filter where required
- Moisture monitoring and representative sampling points
Problems
- Free water
- Stable emulsion
- Dissolved moisture
- Water re-entry
- Entrained gas accompanying moisture
- Fluid instability after treatment
Failure Modes
- Treatment mechanism does not match water state
- Water ingress exceeds removal capability
- Recirculation or treatment time is insufficient
- Viscosity or temperature outside qualified range
- Contamination interferes with separation
- Sampling does not represent system condition
Symptoms
- Water level does not decline as expected
- Moisture rebounds quickly
- Emulsion persists
- Fluid remains cloudy or unstable
- Corrosion or lubrication concerns continue
- Repeated dehydration cycles are required
Root Causes
- Condensation
- Cooler leak
- Seal or process ingress
- Washdown contamination
- Reservoir breathing or storage exposure
- Incorrect treatment mechanism or sizing
Diagnostic Methods
- Identify whether water is free, emulsified or dissolved.
- Confirm oil chemistry, viscosity and temperature.
- Quantify water under representative sampling conditions.
- Inspect likely ingress sources.
- Review reservoir volume, offline flow and treatment time.
- Check coexisting solids or gas contamination.
Corrective Actions
- Correct the water ingress source.
- Select the removal mechanism appropriate to water state and oil chemistry.
- Requalify conditioning flow and treatment time.
- Add particulate prefiltration when solids interfere with treatment.
- Verify post-treatment moisture under comparable sampling conditions.
Maintenance Procedures
- Trend moisture under consistent sampling and temperature conditions.
- Inspect seals, coolers, breathers and common ingress points.
- Maintain vacuum, drains, separators and conditioning filters according to the validated unit design.
- Investigate rapid moisture rebound before extending treatment time.
- Confirm oil compatibility after any process or fluid change.
Operating Conditions
- Oil chemistry
- Water state
- Moisture loading
- Viscosity
- Temperature
- Reservoir volume
- Recirculation flow
- Water ingress rate
- Required final moisture condition
Shared Engineering
- Flow Rate
- Contaminant Loading
- Service Life
- Installation
- Failure Analysis