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30 GPM Internal Bypass Relief Valve Close Coupled Pump – Tri-Rotor Model 20CPX

  • Tri-Rotor Bypass Head Pump Model 20CPX
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Tri-Rotor Pump model 20CPX, along with model 20DX, is the smallest in the family of Tri-Rotor bypass head pumps that incorporate an internal relief valve and provide constant flow rates.  This pump is designed to protect discharge piping and equipment from excessive pressures.  The pump serves a wide range of industrial markets and applications including oil, diesel fuel, and chemical transfer.  

This close coupled double “C-flanged” mounted pump will provide years of trouble-free operation.  By properly bolting the motor feet, this unit requires no base plate and is self-aligning.

The pump is designed with side suction and top discharge threaded ports and is available in both clockwise (CW) and counterclockwise (CCW) rotations for pump installation flexibility.  Materials of construction for the 20CPX model include Iron Fitted, All Iron, Bronze Fitted, or All Bronze configurations.  

Specifications of the Tri-Rotor Bypass Head Pump Model 20CPX:

  • Flow rate:  4 to 30 GPM
  • Viscosity range:  4 to 21,625 cPs (40 to 100,000 SSU)
  • Inlet and Discharge Port size:  1-½” NPT Ports (std.) or 1-¼” NPT Ports
  • Operating temperature range:  -40 °F to 650 °F
  • Maximum operating pressure:  100 PSI
  • Pump displacement per revolution:  0.0176 gal/rev
  • Pump speed range:  240 to 1800 RPM
  • Solids passage available:  0.023 in.
Do you know your system parameters and would like us to quote the best pump model?  Please fill out the Pump Systems & Analysis Sheet.

Configure Your 20CPX Bypass Head Pump

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Tri-Rotor offers an interesting option for its’ 20CPX bypass head design: a Reduced Stroke Pump Head.  With this option, the pump can be designed to target a specific flow rate at a percentage of full flow.

Other Options for the Bypass Head Pump Model 20CPX:

  • Other Materials of Construction options:
    • Shaft:  Steel (std.), Stainless Steel, or Hardened Stainless Steel
    • Piston:  Iron (std.), Bronze, or Steel
    • Bypass Head Gasket options:
      • Standard  {to 250 °F (121 °C)}
      • Heat Resistant  {to 650 °F (345 °C)}
  • Shaft length:  “CFM” (3-15/16”)
  • Shaft seal:  Type 68 Mechanical Seal – Viton  {-40 °F to 300 °F (-40 °C to 150 °C)}
  • Bypass Head Spring options:
    • Standard  {to 60 PSI}
    • Heavy Duty  {to 100 PSI}
    • Heavy Duty Hi Temp  {to 100 PSI}
  • Shuttle design:  Formed Shuttle only
  • Relieved Rotor Group (for higher viscosities: >10,000 SSU/2,150 cPs)
  • Sanitary Preparation of pump internal components for food applications
  • Lubrication:  None required (lubricated for life)
  • Exterior Protection:  Orange Paint (std.), Black Paint, White Lacquer, or 316SS Epoxy Coating
The bare weight of the pump is approximately 19 lbs.  The estimated shipping weight is 24 lbs.

Besides offering just a bare pump only for the Model 20CPX, Tri-Rotor offers a complete mounted pump system, including motor drive assembly and mounting.  Replacement parts for all Series 20CP pumps can be found here.