• WE MANUFACTURE
    LONG LIFE PUMPS.

    WE'RE TALKING DECADES.

    Tri-Rotor 200A solid head pump
    easily handling molasses in a
    Brooklyn, NY plant

  • WE MANUFACTURE
    LONG LIFE PUMPS.

    WE'RE TALKING DECADES.

    Tri-Rotor 80BV variable volume head
    pump operating on crude oil in a deep
    well in Oklahoma

  • WE MANUFACTURE
    LONG LIFE PUMPS.

    WE'RE TALKING DECADES.

    Tri-Rotor 100CX bypass head pump
    pumping viscous corn syrup at a plant in
    Chicago, IL

  • WE MANUFACTURE
    LONG LIFE PUMPS.

    WE'RE TALKING DECADES.

    Tri-Rotor 20DV variable volume head
    metering pump fully mounted and ready to
    move edible oils

  • WE MANUFACTURE
    LONG LIFE PUMPS.

    WE'RE TALKING DECADES.

    Tri-Rotor 80BX bypass head pump
    transferring paint at a paint manufacturer's
    plant in St. Louis, MO

Tri-Rotor® is the inventor of the positive displacement rotary piston pump and we’ve been manufacturing this unique pump for over 85 years. We serve an extensive variety of Markets and Applications with our broad pump line. We custom engineer each pump to your application to ensure the absolute best result. We meticulously build and test every pump by hand and take great pride in our quality and workmanship.

Latest News

The Tri-Rotor 220TV Pump is Ideal for Liquids with Changing Viscosity. Read More >

Model 220TV
variable volume control head pump

Variable Volume Control Head Pumps

Unique to Tri-Rotor, you can infinitely adjust your flow rate with our “V-Head” models, even while the pump is running!

bypass head pump

Bypass Head Pumps

With oversized internal pressure relief valves, Tri-Rotor “X-Head” pumps can bypass full flow volume

solid head pump

Solid Head Pumps

Rugged performance for general fluid transfer


complete pump and motor mount

Complete Pump & Motor Mounted Units

Tri-Rotor designs and builds complex pumping systems to your requirements

man repairing a pump

Pump Service & Repair

Complete inspection and repair of your Tri-Rotor pump at our Connecticut facility

broken apart pump showing parts

Pump Replacement Parts

OEM spare parts for maintenance of your Tri-Rotor pump


Our pumps are available in cast iron and bronze, achieve flow rates up to 240 GPM, and can pump the thickest fluids you can imagine. Well known for its’ long life, the Tri-Rotor rotary piston pump offers many advantages over other positive displacement and centrifugal pump designs such as internal gear pumps, external gear pumps, rotary vane pumps, and rotary lobe pumps.

Features and Benefits of the Tri-Rotor Pumping Principle

  • Simple Operation…just three moving parts
  • Adjustable Flow Options…without need to change motor speed
  • Handles All Viscosities…from 40 to 5,000,000 SSU
  • Energy Efficient…two double-acting pistons & overlapping strokes
  • Low Shear…gentle displacement per revolution
  • Low Noise…liquid-tight internal parts are not in contact
  • Self-Priming…when pump is above liquid level
  • Long Service Life…minimum maintenance required

Please Contact Us for more information about our products and services. If you’re ready for a Quick Quote, we can help with that as well. We can also help you design your pump system. Please fill out our Pump Systems & Analysis Sheet and we can get started.