ML Series Progressive Cavity Metering and Dosing Pumps

ML Series of Progressive Cavity Metering and Dosing pumps

The Liberty Process ML series of Low Flow Progressive Cavity Metering and Dosing Pumps from Liberty Process Equipment offers a high quality pump option for higher pressures at a very competitive price. The ML series is based on the very popular Liberty series of standard flanged progressive cavity pumps. The Pumps are available with standard ANSI suction flanges and with NPT female threaded discharge connections.

The ML series is available in a variety of stage lengths so you can tailor your pump to your exact needs in terms of flow and pressure. The ML series offers a cost effective option and is an ideal pumping solution for metering pump applications and offers several important advantages over other types of metering pumps.

The modular design of the ML Series of Progressive Cavity Metering and Dosing Pump is a hardened pinned-joint drive assembly with a body available in steel or stainless steel and internal wetted components in either stainless steel or hardened tool steel with hard chrome plating for long-life and durability in abrasive pumping applications. Other, non-contacting internal parts are made of carbon steel.

Rotors and Stators for the ML Series are available in 2, 3, and 6 stages representing 120, 150, 225, and 450 PSI discharge pressures with stators available in Buna Nitrile, Viton, EPDM and Natural Rubber. The standard seal design is a set of packing with a lantern ring and flush connectors. Mechanical Seal options are readily available.

Liberty Series - ML Metering Pumps - Technical Data

Flow Rate 0 - 100 GPM
Pressure 120 - 450 PSI
Seal Options Packing or Mechanical Seal
Base Options Steel or Stainless Steel
Rotors Stainless Steel, Chrome Plated Tool Steel
Stators Buna/Viton® / EPDM

Pump Features

  • Modular Design
  • Maintenance Free
  • Easy Assembly/Disassembly
  • Simple Pin-Joint Design
  • Low Shear
  • Non-Pulsating

Industry Uses

ML Series Pump Lines

2ML1 Metering Pumps

The 2ML1 size Progressive Cavity Metering Pump is rated for 0.056 gallons per minute per 100 RPM. Standard connections are 3/4" discharge & 1" suction.

Range 0 - 0.58 GPM
Pressure 0 - 120 PSI

2ML8 Metering Pumps

The 2ML8 size Progressive Cavity Metering Pump is rated for 11.7 gallons per minute per 100 RPM. Standard connections are 6" & 4".

Range 25 - 100 GPM
Pressure 0 - 150 PSI

3ML1 Metering Pumps

The 3ML1 size Progressive Cavity Metering Pump is rated for 0.056 gallons per minute per 100 RPM. Standard connections are 3/4" & 1".

Range 0 - 0.58 GPM
Pressure 0 - 180 PSI

6ML1 Metering Pumps

The 6ML1 size Progressive Cavity Metering Pump is rated for 0.056 gallons per minute per 100 RPM. Standard connections are 3/4" & 1".

Range 0 - 0.58 GPM
Pressure 0 - 360 PSI

6ML2 Metering Pumps

The 6ML2 size Progressive Cavity Metering Pump is rated for 0.026 gallons per minute per 100 RPM. Standard connections are 1-1/2" & 3/4".

Range 0.50 - 3.0 GPM
Pressure PRESSURE0 - 360 PSI

6ML3 Metering Pumps

The 6ML3 size Progressive Cavity Metering Pump is rated for .86 gallons per minute per 100 RPM. Standard connections are 2-1/2" & 1-1/4".

Range 1.7 - 10.0 GPM
Pressure 0 - 450 PSI

6ML4 Metering Pumps

The 6ML4 size Progressive Cavity Metering Pump is rated for 2.02 gallons per minute per 100 RPM. Standard connections are 2-1/2" & 3".

Range 1.8 - 24 GPM
Pressure 0 - 450 PSI

Pumps and pump parts offered for sale by Liberty Process Equipment, Inc. are made in the United States, Germany, India, Spain, Argentina and Brazil.

*Liberty Process Equipment, Inc. is not affiliated with nor distributor for Seepex®, Allweiler®, Moyno®, Tarby®, Netzsch®, or Continental Inc.® All referenced product names, brands, models, or part numbers is solely for identification purposes. Seepex® is a registered trademark of Seepex®. Moyno® and Tarby® are registered trademarks of Robins and Myers® and NOV®, Netzsch® Incorporated is a registered trademark of the Netzsch® Group, Allweiler® is a registered trademark of Colfax® Corporations Continental® Pumps is a Trademark of Continental® Ultra Pumps.