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American AP-56 Series

Long-Coupled Wobble Stator Pumps and Parts

The American AP-56 Long-Coupled Wobble Pump offers flows from 0-24 GPM and pressures up to 50 psi. The simple design of the wobble stator and just one universal joint give you the inherent advantages of a progressive cavity pump of low pulsation and shear, solids handling, and pumping viscous liquids at an affordable price.

In addition, the pump is available with a standard mechanical seal or can be upgraded to a hard-face mechanical seal for abrasion resistance. We also offer optional gland packing. The American pump series is also offered in a close-coupled design for mounting on a baseplate with a standard motor.

View Pump Curves, Drawings & Performance

Find out more about the specifications of the American Series AP56 Pump on our Liberty Process website.

Aftermarket American Series AP-56 PC Pump Parts

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AP-56 Wobble Pump Motors/Baseplates

Motors and mounting baseplates for full pump packages are available based upon your requirements. Please contact us today to discuss your options.

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AP-56 Wobble Pump Stators

Standard Buna Nitrile stators with options in Viton and EPDM. Other stator materials are available. Contact us for details.

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AP-56 Wobble Pump Rotors

The long-coupled version is available with a standard 304 stainless steel hard-chrome plated rotor for long service life.

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AP-56 Wobble Pump Parts

Replacement pump parts as well as rebuild services for wobble stator pumps are available. Parts are available online, for rebuild services please contact us.


*Neither Progressivecavityparts.com nor its parent companies nor their replacement aftermarket progressive cavity pump parts are representative, affiliated or associated with Moyno®, Tarby®, Netzsch®, Continental®, Seepex®, Roper® or Allweiler® or their respective parent corporations. All part numbers, product lines and/or descriptions are for reference purposes only.

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AP56 Wobble Stator Pump AP56 Wobble Stator Pump-Stainless Steel American Series AP56/APM56 F Pump Stator -Viton
AP56 Wobble Stator Pump
Sold Individually $1,164.00
AP56 Wobble Stator Pump-Stainless Steel
Sold Individually $2,449.00
AP56/APM56 Pump Stator
Sold Individually $574.00
w/Threaded Connections - 0-24 GPM w/Threaded Connections -  0-24 GPM Viton
American Series AP56/APM56 Threaded Wobble Stator Pump Rotor American Series AP56/APM56 CDQ Suction Case - Cast Iron American Series AP56/APM56 SSQ Suction Case - Stainless Steel
AP56/APM56 Threaded Pump Rotor
Sold Individually $267.00
AP56/APM56 Suction Case
Sold Individually $337.00
AP56/APM56 Suction Case
Sold Individually $555.00
Chrome Plated Stainless Steel Cast Iron Stainless Steel
American Series AP56/APM56 CDB Pump Stator American Series AP56/APM56 Standard Mechanical Pump Seal American Series AP56/APM56 Hard Face Mechanical Pump Seal
AP56/APM56 Pump Stator - EPDM
Sold Individually $155.00
AP56/APM56 Mechanical Pump Seal
Sold Individually $63.00
AP56/APM56 Hard Face Pump Seal
Sold Individually $150.00
EPDM Carbon/Ceramic with Buna Elastomers Silicon Carbide/Silicon Carbide with Buna Elastomers
AP56/APM56 Mechanical Pump Seal American Series APM56/AP56  SSF Threaded Flex Joint American Series AP56/APM56 Threaded Flex Joint - Stainless Steel and Buna Nitrile
AP56/APM56 Mechanical Pump Seal
Sold Individually $73.00
APM56/AP56 Threaded Flex Joint
Sold Individually $338.00
AP56/APM56 Threaded Flex Joint
Sold Individually $244.00
Carbon/Ceramic with Viton Elastomers Stainless Steel and Viton Stainless Steel and Buna Nitrile
American Series AP56 SSQ Wobble Stator Pump Threaded Drive Shaft American Series AP56 Bearing - Steel American Series AP56 CSQM Bearing Housing
AP56 Threaded Drive Shaft
Sold Individually $220.00
AP56 Bearing
Sold Individually $165.00
AP56 Bearing Housing
Sold Individually $327.00
Stainless Steel Steel Cast Iron
American Series AP56 SSQ Bearing Housing American Series AP56/APM56 Drain Plug American Series AP56/APM56 Drain Plug
AP56 Bearing Housing
Sold Individually $835.00
AP56/APM56 Drain Plug
Sold Individually $10.00
AP56/APM56 Drain Plug
Sold Individually $16.00
Stainless Steel Steel Stainless Steel
American Series AP56 Retaining Ring
AP56 Retaining Ring
Sold Individually $14.00
Steel