SES323 - Cable Oil
SES323 Cable Oil Purifier

This compact versatile cable oil conditioning system prepares insulating fluids for use in high voltage cables.

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The SES323 is a dielectric oil conditioning and regeneration system specifically designed for filling and maintaining high power cable insulating/cooling fluids. The SES323 conditions dielectric fluid for use by removing dissolved water, gas and particulate. An optional adsorbent treatment phase is also provided to correct the total acid number and color if necessary.

The standard configuration provides both straight through single pass processing and multi-pass processing using the integrated 55 gallon stainless steel reservoir.

SES323 Highlights

Conditions Mineral & Synthetic Dielectric Cable Fluids

  Straight Through Single Pass Processing

Multi-Pass Batch Processing

  Viscosities up to 2000 SSU

Built-in 100% Safety Spill Retention

130 CFM Vacuum Capacity

External Vacuum Connection Available


SES320C Combined 1000x1000

Cable Oils and Other Specialty Dielectric Fluids

SES323 is used as a cable dielectric fluid conditioning system to prepare mineral-based and synthetic cable dielectric fluids for high voltage cable service. Fluid insulating properties are improved to acceptable levels by removing dissolved water, dissolved gas, and solid matter contamination. If necessary, polar contaminants can also be removed using the process loop optional activated alumina cartridge filter. The discharge pressure is adjustable to 175 PSI to handle challenging cable-filling requirements.

The SES323 system is specifically designed to accommodate a wide range of cable dielectric fluids including the more viscous fluids such as DF500.

Dual Processing Modes - (Panel Selectable)

The SES323 has enough vacuum, heating, storage capacity to permit both batch and single pass processing.   In batch mode an internal 304 SS storage tank is used to provide multiple passes through the process loop.  Batch quantities can range from 10 to 60 gallons.  Single-pass mode requires the batch reservoir to be empty and operates at a reduced flow rate to provide straight-through processing. Batch and single pass processing modes switch selectable from the control panel.

Adsorbent Treatment Phase

An adsorbent treatment stage is provided to remove acids, color bodies, sludge components and other polar contaminants if necessary. A bypass circuit is provided. Use of the adsorbent treatment stage is optional. The housing accepts standard flat gasket sealed Fullers Earth and Activated Alumina cartridges.    

Accurate Fail Safe Oil Temperature Control

The SES320B heating system uses high surface area heating elements to provide gentile low watt density indirect oil heating.  A digital PID temperature controller is used to provide accurate panel adjustable temperature control. Flow and high-temperature system interlocks are provided for worry-free fail-safe operation. 

Stand Alone Vacuum System 

Need a vacuum system?  Whether it's for everyday use or emergency use the SES320B has an isolated external connection allowing it to be used as a stand-alone 130 CFM vacuum system capable of achieving pressures as low as 0.1 torr.  A panel mounted full-scale digital vacuum gauge is provided to monitor the vacuum system pressure.

Built-in 100% Safety Spill Retention

 The SES320B skid is designed to contain minor drips and major spills. The skid integrated tank provides 100% containment of any potential system spill.  Including the entire volume of the 65-gallon batch tank. 

Treatment Stages
  • Oil Heating
    • The fluid is gently heated to reduce the viscosity in preparation for the vacuum dehydration and option adsorbent treatment stages.
  • Polar Contaminant Adsorption (optional)
    • The heated fluid then passes through an optional (bypass included) adsorbent media process that removes acids, color bodies and other polar contaminants.
  • Filtration (3μ β200)
    • The next treatment phase uses long life, low pressure drop, pleated synthetic filter media to remove 99.9% of all particulate > than 3 microns.
  • Vacuum Dehydration & Degasification
    • Vacuum and high efficiency thin film low temperature evaporation is used to remove dissolved water and dissolved gasses.
  • Filtration (0.5μ β75)
    • A polishing filter completes the process.
    • Pleated synthetic filter media is used to remove 98.7% of all particulate > than 0.5 microns.
  • Results
    • The conditioned oil is now ready for use.
    • Discharge flow rate and pressure are adjustable to accommodate cable requirements.
Processing Rate
Batch Mode

180 GPH (680 LPH)

65 Gallon Capacity

Single Pass Mode 60 GPH (226 LPH)
Processed oil quality
Dielectric Strength
(ASTM-D1816-84A 2mm gap
> 60 kV - (Dielectric Fluids)
Moisture Content  Typically 1 - 10 ppm
Total Gas Content  <  0.25%
Particulate Content

0.5μ @ β75

Polar Contamination 

(Optional treatment stage)

Effect on oil properties
will vary with the application
purification process
Watt Density 11.5 Watts/in2
Temperature Range (Adjustable) 120 F° ( 49 C°) to 190 F° ( 88 C°)
Vacuum Limits 0.1 Torr
Vacuum Capacity 130 CFM @ 0.5 Torr
Suction Lift 12 ft
Discharge Pressure Adjustable 40 - 175 PSI

English 55” W x 55” D x 73” H
Metric 140 cm W x 140 cm D x 185 cm H
Inlet 1.25 FNPT
Discharge 0.75 FNPT
Vacuum  2" MCAM
Power Requirements
480V/3PH/60HZ 25 A
240V/2PH/60HZ 50 A
230V/1PH/60HZ 80 A
60 A @ 6 kW
English 2850 lbs (Dry)
3294 lbs (Full Batch)
Metric 1293 kg (Dry)
1494 kg (Full Batch)

Processing Modes

  • Batch Only
  • Batch with Single Pass

Operating Voltage

  • 240 V / Single Phase / 60 Hz
  • 240 V / Three Phase / 60 Hz
  • 480 V / Three Phase / 60 Hz

Available Add-ons

  • Dirty Filter Alarms
  • Switch & Pilot LIght Control Interface with Relay Logic
  • Outlet Moisture & Temperature Monitor
  • Contamination Monitor
  • 50' Power Cable
  • Skid Lifting Lugs
  • Skid Tow Motor Pockets
  • Oil Suction Hose (25 ft / 7.62m)
  • Oil Discharge Hose (25 ft / 7.62m)
  • Vacuum Hose (25 ft / 7.62m)

The SES320C can be stationary skid-mounted or packaged in an easy-to-tow cargo trailer for mobile applications.

  • 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.