Fullers Earth Systems

The SES522 Adsorbent Treatment Systems (Fullers Earth) remove polar contaminants such as acids, oxidation by-products, and color bodies from dielectric oils and numerous other fluids.

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The SES522 Adsorbent Treatment Systems (Fullers Earth) remove polar contaminants such as acids, oxidation by-products, and color bodies from numerous fluids. The bulk media  systems can be used for stand-alone treatment or in conjunction with the SES320 conditioning system to regenerate badly degraded ISO class III insulating fluids and with multiple passes, "desludge" badly contaminated transformers. The SES522 systems are available in three tower sizes as well as in dual and single tower configurations.

SES522 Highlights

Removes Acids, Color Bodies, and Sludge

Duplex Tower Configuration Optional 

 Allows for Parallel or Series Flow Processing

Flow Rates up to 40GPM (9085 LPH)

  Easy Vacuum Assisted Media Replacement

Fluid Pre-Heating Systems Optional 


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 Insulating Oil Properties Restored

  • Total Acid Number (TAN)
  • Negative Neutralization Value 
  • Negative Interfacial Tension (IFT)
  • Color
  • Dissipation Factor
  • Eliminates Sludge and Oxidation Byproducts
  • Oxidation Stability * 

* Note: Polar additives, such as oxidation inhibitors, can be removed during adsorbent treatment processing.  Additive restoration requires an optional additive mixing and injection system.

Fullers Earth Graph


Max Tower Flow Rate 10 GPM | 38 LPM 25 GPM | 95 LPM 35 GPM | 133 LPM
Optimum Oil Viscosity 40 SSU 40 SSU 40 SSU
Pressure Drop (@ 40 SSU @ Max Flow Rate)

20 PSI

20 PSI 20 PSI
Dual or Single Processing Towers Either Either Either
Skid Mounted Yes Yes Yes

Housing Rating

100 PSI 100 PSI 100 PSI
Socket Weld Isolation Valves Provided Provided Provided
SPENT MeDia Extraction
Tilt for Media Extraction Manual Hydraulic Assisted Hydraulic Assisted
Vacuum Assisted New Media Fill High Speed High Speed High Speed
Vacuum Source Optional Optional Optional
Spent Media Oil Blow Down Tank Provided Provided Provided
Air Compressor Optional Optional Optional
FLow patterns for optional Dual processing towers
Either Tower Yes Yes Yes
Parallel through Both Towers Yes Yes Yes
Series through Both Towers Yes Yes Yes

Customization Options for the SESCO SES522 Fullers Earth Systems

  • 250, 500, or 800 lbs Tower Capacities
  • Flow Capacities up 2400 GPH 
  • Single & Dual Tower Systems
  • Stationary Vertical & Mobile Tilt Media Removal
  • Integrated Oil Storage for Extracted "Blowdown" & "Makeup" Oil
  • Media Fill Vacuum Source
  • Inhibitor Mixing & Injection System


  • Skid Mounting
    Built-to-order skid-mounted equipment can normally be built to meet customer footprint and access requirements.  Consult SESCO with special requests.
  • Cargo Trailer Mounting
    All cargo trailers are specifically engineered to accommodate equipment load, weight distribution, to provide optimum towing conditions. Cargo trailer weight capacities (GVRW) range from 4,000 to 16,000 Lbs. SESCO will provide the cargo trailer size and weight capacity options available for the system being quoted.