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Oil/Water Separators

Oil/Water Separators were developed by Master Fluid Solutions to extend coolant life and to reduce the harmful effects of tramp oil contamination on water-miscible fluids such as poor tool life and finishes, corrosion, dermatitis, and fluid rancidity.

Number of products in category is 2

Machine Talk: A Handy Guide to a Clean Machine

Master Coalescer Jr™

High-performance, low-maintenance coalescer removes tramp oil while machine is running

Master Coalescer Jr™

Committed today for a greener tomorrow.

Master Coalescer Jr packs the punch to add up to BIG savings.

A low-cost, smaller yet effective, tramp oil separator: Master Coalescer Jr.™ Compact and affordable, Master Coalescer Jr processes machine tool coolants to remove tramp oils and fines and provide clean, reusable coolant – paying for itself with extended coolant and tool life, improved machinability, and reduced maintenance.

Extremely efficient, "Junior" offers:

  • Compact design to work with CNC machines with small, hard-to-access coolant sumps
  • Maximum tramp oil removal while machine is running
  • Minimal maintenance
  • Simplified operation; less operator involvement
  • Portability allows shared use on several machine tool sumps


  • Up to 1 GPM flow rate, no adjustments to make
  • Pre-pump strainer
  • Electric 120 volt diaphragm pump – primes to 48"
  • Easily removable media pack with 132 square feet of coalescing surface area
  • Valve to easily drain and clean tank
  • Internal adjustable tramp oil discharge valve
  • Adjustable leveling pads
  • New floating skimmer – only 3" diameter – works in sumps as shallow as 11/2" deep to collect oils and soiled fluid

    SCROUNGER® Jr Oil Skimmer

    Effectively Remove Oil from Coolants and Washing Solutions

    SCROUNGER<sup>®</sup> Jr Oil Skimmer

    Tramp oil is a major source of problems associated with water miscible cutting and grinding fluids.

    Tramp oil contributes to the growth and formation of:

    • coolant-destroying bacteria
    • undesirable residues on machine tools and workpieces
    • smoke and oil mist in shop atmospheres

    These problems result in:

    • shortened coolant life
    • poor material removal rates
    • poor surface finish and size control
    • decreased tool and wheel life

    Numerous devices ("floating ropes," wheels, and belts) have been developed over the years to remove "free floating" tramp oil from the surface of coolant. While they have all worked to one degree or another, they generally have been either "troublesome," high maintenance, relatively ineffective, or able to operate only on limited liquid level fluctuations.

    As a "belt-type" skimmer, these units are effective in removing floating oil from widely fluctuating liquid levels of coolants or parts washing solutions. The SCROUNGER features a revolutionary new oleophilic belt and a totally new concept of stripping the separated oil from the belt. The SCROUNGER Jr. uses the same "oil loving" belt, but uses a more compact scraper blade to strip the separated oil from the belt.


    • 115 volt, single phase, 50/60 Hz
    • heavy-duty, impedence-protected, fan-cooled drive motor with hardened shaft and needle bearings (220 volt, single phase, 50 Hz also available)
    • open, accessible oil-collecting tray with a convenient drain connector
    • "oil loving" oleophilic belt (purchased separately)
    • heavy-duty steel construction, with industrial-grade enamel paint


    • fast, simple belt changing
    • low maintenance
    • lower hang roller that will not fall off in the machine sump even in turbulent conditions


    • dewatering tray
    • portable kit
    • special length belts available on special order
    • special belt materials available for high temperature or pH applications on special order

    SCROUNGER Jr Belts

    • all belts 1" [25mm] wide
    • 24" [610mm]
    • 32" [815mm]
    • 44" [1120mm]