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The oil coalescing system separates waste oil from aqueous parts washer cleaning solution. Removes oil to a lower concentration than disc oil skimmers. Uses simple well known physics principals to separate oil from the aqueous parts washer solution. Unique floating suction head  removes free-floating oils from the parts washer surface discharging oil/solution into coalescing chamber. Diffuser spreads and slows flow through the chamber as the coalescing media attracts and agglomerates small droplets until they are large globules and buoyant enough to float to the surface. A weir skimmer removes accumulated oil from the surface and drains to a container next to the aqueous parts washer for disposal. Bottom drain allows removal of any accumulated solids that sink. Cleaned effluent is returned to the aqueous parts washer reservoir. Coalescing efficiency is improved during periods when washer solutions are cooler such as non-production hours. Non-emulsifying parts washing cleaners take maximum advantage of coalescer technology.

Benefits of the oil coalescer:

  • Remove oil while aqueous parts washer is cleaning
  • Maximum oil removal system
  • Reduce labor and chemical costs for parts washing
  • Reduce the volume of treated aqueous wastewater
  • Simplify the overall cleanup process of the parts washer.
  • Reduce clean out of aqueous parts washer by up to 60%


  • Continuous closed loop recycling system – skim and remove free oil during parts washing
  • Tough steel coalescing Media is washable for reuse.
  • Solids accumulation zone with drain.
  • Adjustable oil skimmer
  • Inlet diffuser for improved separation of wash water
  • Compatible with parts washing chemicals
  • High Temperature (195°F) resistant
  • Floating weir pulls solution from aqueous parts washer surface for maximum separation
  • Leaves no visible oil sheen and collects solids
  • Pre-engineered, prepackaged and fully integrated with StingRay Aqueous Parts Washer
  • Stainless steel Air Operated Diaphragm circulation pump - 5gpm
  • Remove oil to 20 ppm, 30-micron size

StingRay Parts Washers

HD Retractable Turntable Models
In-line Lift Door
Aircraft Wheel Washer Systems