Key Benefits

  • Reduced maintenance problems and expenses
  • Much cleaner fluid
  • Efficiency for many different jobs

Remove abrasive particles from your pump seals with Doxie Cyclones

Your pumps wear down over time. One of the key contributing factors to this wear and tear is abrasive particles within the liquid coursing through a pump. These particles can cause clogs and internal damage to the pump. Canned pump bearings and mechanical seals are often damaged, resulting in costly maintenance and extended downtime.

When you can reduce the number of parts within your equipment, you have fewer things that can break, and therefore less maintenance. Doxie Cyclones use only centrifugal force to spin abrasive particles from the liquid which flows on to the bearings or the dynamic seals on rotating shafts. The Doxie Cyclone separator has no moving parts, which means no maintenance since there’s nothing to adjust. High separation efficiency provides superior grit removal.

Doxie Cyclones eliminate your pump seal and bearing problems

Reduced maintenance problems and expenses
Any time you experience clogs, leaks or pump malfunctions, you face downtime and maintenance expenses. Doxie Cyclones clean away abrasive particles to protect critical parts like pump seals and bearings.
Much cleaner fluid

Clean fluid is key. Doxie Cyclones help you maintain it using only centrifugal force.

Efficiency for many different jobs
Doxie Cyclones are available in three different models, each tailored to specific maximum operating temperatures, operating pressure drops and maximum working pressures.

Simple, innovative design makes Doxie Cyclones intuitive and effective

How the Doxie Cyclone works

Feed from the pump discharge is piped into the Doxie inlet which enters tangential to the cyclone cone. Much like a whirlpool, the liquid then rotates at a high velocity.


Sand, dirt and other very fine particles are thrown to the wall of the cyclone and pass downward and out the Doxie underflow discharge.


Cleaned liquid spins into the center of the cyclone and is forced upward and out the Doxie overflow discharge. This clean stream is then routed through tubing to the place of usage - the mating surfaces of the shaft seal or to the bearings.


The pump supplies all the pressure drop energy necessary to provide the separation.

Selecting the right Doxie Cyclone for your needs

  1. Designate the flow required. This is often the flow required for a mechanical seal. Since the Doxie cyclone splits the flow 60% to the overflow and 40% to the underflow, divide the mechanical seal flow (GPM) by .60 and this will give the Doxie feed flow required. The Doxie® overflow flushes and cools the mechanical seal.
  2. Establish the size of particles to be removed. The Doxie Type A and 5, (10 mm diam.) are used to remove particles in the range of 3-8 microns in diameter. The Type P Doxie (25 mm diam.) is used to remove particles in the range of 10-15 microns. These size ranges are based on solids having a 2.7 specific gravity suspended in water
  3. See the charts below for more specific information

Three Doxie Cyclone models to serve you

The Doxie® is available in different models to fill your unique needs.

Doxie 5

  • Six 10 mm cyclones manifolded in a common pressurized housing (patented).
  • Clog-proof design, adjustable capacity and self-contained strainer.
  • Available in 316 SS, maximum working pressure 2000 psi up to a maximum operating temperature of 400°F.

Doxie Type A

  • Single 10 mm cyclone machined from a single block of 316 SS.
  • Also available in other alloys.
  • Maximum working pressure 2000 psi up to a maximum operating temperature of 400°F.

Doxie Type P

  • Single 25 mm cyclone made of nylon or corrosion-resistant Kynar® construction.
  • Low cost, rugged separator.
  • Maximum working pressure 200 psi at 200°F and 600 psi at ambient temperature.


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