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Justice LJ4 Series Progressive Cavity Pump

Progressive Cavity Hopper Parts & Pumps

The Justice Series Open Hopper Progressive Cavity Pump is an ideal low-flow pumping solution for viscous solutions with high solids contents such as high-viscosity foodstuffs, food waste and other non-easily pumped materials with solids content. The Justice Series offers a heavy-duty auger in a gravity-fed hopper mated to a rotor and stator for the most difficult pumping applications available today.

The LJ4 series of progressive cavity hopper pump parts are supplied as 100% drop in aftermarket parts for your Moyno® J4-Frame and Tarby® TJ4 Frame pumps. Parts such as Rotors, Stators, Connecting Rods, Seals, Gasketery and more are all available as quality aftermarket replacement pump parts for your existing pump assembly.

Flow rates of 2.02 GPM per 100 Revolutions (5 GPM to 9 GPM) at up to 225 PSI are standard through the range of the series. The Justice Series offers a design of a heavy-duty auger mated to a rotor and stator for the most difficult pumping applications.

The large rectangular feed hopper design easily accommodates your pumping medium while the non-pulsating design of the product produces a low-shear flow that conveys your medium along effortlessly. Solids in suspension of up to 50% are accommodated by the Auger design.

LJ4 Progressive Cavity Pump Drive Assembly

The pump units modular design with simple hardened pinned joint drive assembly makes it an ideal cost-effective choice. The standard seal design is a set of gland packing with a Lantern Ring and flush connections. Mechanical seal options are readily available.

View Pump Curves, Drawings & Performance

Find out more about the specifications of the Justice Series LJ4 Pump on our Liberty Process website.

Aftermarket Justice Series LJ4 PC Pump Parts

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LJ4 Motors/Baseplates

LJ4 Series Pump Casings and Supports in Cast Iron, Steel and Stainless Steel are available for your pumping requirements. Pumps can be assembled with a variety of materials for a customized pumping solution for you. Please contact us today to discuss your options.

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LJ4 Stators

Stators are available in many elastomer materials such as Buna, natural rubber, EPDM and Viton.

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LJ4 Rotors

Rotors are typically hardened tool steel or 316 stainless steel with a hard chrome plating specification and are available in 1, 2, and 3 stages for applications with 75, 150, and 225 PSI discharge pressures. All other wetted parts are either carbon steel or 316 stainless steel.

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LJ4 Parts / Kits

The Liberty LJ4 Progressive Cavity Pump parts are direct aftermarket replacements that dimensionally interchange with the Moyno® J4 Series, and the Tarby® TJ4 Series.* 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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2LJ4 Progressive Cavity Hopper Pump -  Steel Auger 1LL4 PC Pump Stator 2LL4 PC Pump Stator
2LJ4 Progressive Cavity Hopper Pump
Sold Individually $6,296.00
1LL4 PC Pump Stator
Sold Individually $195.00
2LL4 PC Pump Stator
Sold Individually $295.00
2LJ4 Progressive Cavity Hopper Pump 1LL4 PC Pump Stator Buna Nitrile with Steel Casing
3LL4 Pump Stator 2LL4 PC Pump Stator 3LL4 PC Pump Stator
3LL4 Pump Stator
Sold Individually $394.00
2LL4 PC Pump Stator
Sold Individually $558.00
3LL4 PC Pump Stator
Sold Individually $394.00
Buna Nitrile with Steel Casing Buna Nitrile with Stainless Steel Casing Natural Rubber with Steel Casing
2LL4 PC Pump Stator 1LL4 PC Pump Stator-Stainless Steel 1LL4 PC Pump Stator- Stainless Steel
2LL4 PC Pump Stator
Sold Individually $295.00
1LL4 PC Pump Stator-Stainless Steel
Sold Individually $314.00
1LL4 PC Pump Stator- Stainless Steel
Sold Individually $314.00
Natural Rubber with Steel Casing EPDM Rubber with Stainless Steel Casing Buna Nitrile with Stainless Steel Casing
1LL4 PC Pump Stator 2LL4 PC Pump Stator 3LL4 PC Pump Stator
1LL4 PC Pump Stator
Sold Individually $538.00
2LL4 PC Pump Stator
Sold Individually $848.00
3LL4 PC Pump Stator
Sold Individually $1,230.00
Viton with Steel Casing Viton with Steel Casing Viton with Steel Casing
2LL4  PC Pump Stator-Stainless Steel 3LL4 PC Pump Stator 2LL4 PC Pump Stator-Stainless Steel
2LL4 PC Pump Stator-Stainless Steel
Sold Individually $1,400.00
3LL4 PC Pump Stator
Sold Individually $738.00
2LL4 PC Pump Stator-Stainless Steel
Sold Individually $600.00
Viton with Stainless Steel Casing Buna Nitrile with Stainless Steel Casing EPDM with Stainless Steel Casing
1LL4 PC Pump Rotor 1LL4 PC Pump Rotor-Stainless Steel 2LL4 PC Pump Rotor
1LL4 PC Pump Rotor
Sold Individually $323.00
1LL4 PC Pump Rotor-Stainless Steel
Sold Individually $567.00
2LL4 PC Pump Rotor
Sold Individually $567.00
Chrome Plated Steel Chrome Plated Stainless Steel Chrome Plated Steel
2LL4 PC Pump Rotor-Stainless Steel 3LL4 PC Pump Rotor 3LL4 PC Pump Rotor-Stainless Steel
2LL4 PC Pump Rotor-Stainless Steel
Sold Individually $920.00
3LL4 PC Pump Rotor
Sold Individually $796.00
3LL4 PC Pump Rotor-Stainless Steel
Sold Individually $1,186.00
Chrome Plated Stainless Steel Chrome Plated Steel Chrome Plated Stainless Steel
LL4 PC Pump Shaft Pin LL4 PC Pump Shaft Pin-Stainless Steel LL4 Pump Rotor Pin-Stainless Steel
LL4 PC Pump Shaft Pin
Sold Individually $18.00
LL4 Pump Rotor Pin-Stainless Steel
Sold Individually $26.00
Steel Stainless Steel Stainless Steel
LL4 PC Pump Rotor Pin LL4 Stator Support Foot - Cast Iron LL4 Drive Pin Retaining Screw
LL4 PC Pump Rotor Pin
Sold Individually $18.00
LL4 Stator Support Foot
Sold Individually $102.00
Steel Cast Iron Stainless Steel
LL4 PC Pump Thrust Bearing LL4 PC Pump Radial Bearing LL4 PC Pump Bearing Spacer
LL4 PC Pump Thrust Bearing
Sold Individually $142.00
LL4 PC Pump Radial Bearing
Sold Individually $85.00
LL4 PC Pump Bearing Spacer
Sold Individually $34.00
Steel Steel Steel