Liquiflo chemical processing pumps are designed for heavy duty industrial use, with features and options that make them an ideal choice for a wide range of applications.  Edelmann & Associates, Inc. offers our customers the line of Liquiflo gear pumps and centrifugal pumps across Minnesota, western Wisconsin, North Dakota, and South Dakota

Liquiflo pumps are made from high-alloy materials such as 316 Stainless Steel, Alloy-C, Alloy-20 and Titanium.  By offering a large selection of corrosion-resistant internal materials and multiple sealing options – such as mechanical seals and magnetic-drives – Liquiflo pumps are capable of pumping a wide range of chemicals – including acids, caustics, solvents and polymers – over a wide range of conditions. They are often compared to Oberdorfer pumps.

Liquiflo Chemical Processing Pumps primary pump types are summarized below.

For personalized assistance with sizing and selection, please fill out the form on the right>>>

Liquiflo Chemical Pumps Selection

Liquiflo Gear Pumps

Liquiflo gear pumps are positive displacement pumps that are:

  • self-priming
  • non-pulsating flow
  • lower NPSH (net positive suction head) requirements
  • ideal for metering applications
  • ideal for pumping nonabrasive, viscous liquids at high differential pressures. 
  • ideal for handling countless types of chemicals
  • highly reliable in high-viscosity, high-pressure and high-temperature applications

Liquiflo has expanded their gear pump applications into low-viscosity fluids by adding options for non-metallic, self-lubricating and wear-resistant components.

Why gear pumps over diaphragm, metering, progressive cavity, peristaltic?
Liquiflo gear pumps are a preferred alternative to other pump types, such as Diaphragm pumps, Progressive Cavity pumps, Peristaltic pumps and Piston metering pumps.  Gear pumps are an alternative to Diaphragm pumps because they do not pulse or require an expensive air source to operate. For metering pump applications, they do not require pulsation dampeners or other ancillary equipment. In continuous duty applications, they generally last longer than Diaphragm, Progressive Cavity or Peristaltic pumps, which require frequent part replacement, such as diaphragms, stators, rotors or hoses.  Liquiflo gear pumps have a simple principle of operation which makes them easy to install and maintain.

Liquiflo gear pumps feature flow rates up to 55 gpm, with differential pressure up to 350 psi, and they can accommodate fluids with viscosities from 0.3 to 100,000+ cP. Constructed from stainless steel, various alloys, or titanium, Liquiflo pumps are built with corrosion resistant internal materials and are available in mechanically sealed or mag drive configurations. We also carry complete pump repair kits, cartridges, and offer options such as temperature control jackets, gear reducers, variable speed drives, air motors, and more.

  • Flows up to 55 gpm
  • Differential Pressures up to 350 psi
  • Viscosities from 0.3 to 100,000+ cP
  • Corrosion-resistant Internal Materials
  • Sealed or Mag Drive
  • Threaded or Flanged Ports
  • Close-coupled or Long-coupled
  • Compatible with NEMA Motors
  • Base Plate Mounting
  • Repair Kits & Replacement Cartridges
  • 316 SS, Alloy-C, Alloy-20 or Titanium Construction
  • Options (Temperature Control Jackets, Gear Reducers, Variable Speed Drives, Air Motors )

Liquiflo Centrifugal Pumps

Centrifugal pumps deliver pulse-less flow rates higher than typical positive displacement pumps. Liquiflo manufactures two series of centrifugal pumps to cover a wide range of chemical applications:  The Centry® Series and the Endura® Series.

Liquiflo’s Centry® Pumps are Sealed and Magnetically-Coupled (MC) centrifugal pumps engineered and manufactured for equipment reliability. These pumps are specifically designed to handle the lower flow applications that create maintenance problems for standard ANSI pumps operating at less than BEP. The Centry Series pumps can handle flows up to 160 GPM and heads up to 100 ft. They are available in 316 Stainless Steel or Alloy-C* constructions, and with threaded or flanged port configurations.

Liquiflo’s Endura® Pumps are Group I & Group II ANSI-Dimensional Magnetically-Coupled (MC) centrifugal pumps. These pumps were designed to meet the demands of the chemical processing industry. They also handle many other demanding pump applications, such as dry-running, pumping slurries or high-temperature demands. The Endura Series pumps cover flows up to 770 GPM and heads up to 420 ft. They are available in 316 Stainless Steel or Alloy-C* constructions, and with flanged port configurations.


  • Flows up to 770 gpm
  • Heads up to 420'
  • 316 SS or Alloy-C Construction
  • Sealed or Mag Drive
  • Threaded or Flanged Ports
  • Close-coupled or Long-coupled
  • Compatible with NEMA Motors
  • Base Plate Mounting

What Pump Seal Type is the Best for my Application?

Liquiflo-double-mechanical-seal-typesLiquiflo Pumps come in many different seal configurations.

  • Magnetically Coupled
  • Single Mechanical Seal – Internally Mounted
  • Single Mechanical Seal – Externally Mounted
  • Double Mechanical Seal
  • Packing Seal

Magnetically-Coupled Pumps have no dynamic seals to leak replace.  They utilize an outer coupling attached to the motor shaft and an inner coupling within a containment shell attached to the pump shaft.  The synchronous magnets rotate the pump shaft with the motor, and all the liquid stays sealed within the containment shell.  Mag-Drive pumps provide a simple and secure solution to sealing toxic, noxious, crystallizing or other hazardous fluids.

The Single Mechanical Seal Internally Mounted arrangement is the standard and is by far the most common configuration used when pumping any type of chemical where leakage needs to be kept to a minimum. This seal type can tolerate limited amounts of abrasive particles. The maximum fluid viscosity recommended is 5000 CPS.

The External Mechanical Seal arrangement is used when system pressures are below atmospheric pressure (vacuum). This is because the atmospheric pressure will assist in holding the seal faces together. This seal arrangement isolates the mechanical seal from the fluid being pumped which can be an advantage when pumping chemicals that are not compatible with the seal body. The maximum fluid viscosity recommended is 5000 CPS.

The Double Mechanical Seal arrangement relies on a lubricating system to cool the seal faces. The lubricating barrier liquid washes the seal faces and must be safe and compatible with the pumpage. Accordingly, double seals are common for crystallizing or abrasive liquids as the seal faces are only exposed to the flush liquid. Double seals must be pressurized so that the seal chamber has about 15 PSI higher pressure than the pump discharge pressure.

Although Packing is still used, it is not very common in the processing industry. It is still considered to be an acceptable solution when pumping safe liquids or where the seal drainage can be captured. Flocculants, water, and caustics are common examples of fluids which use this type of seal. Teflon is the standard packing material. Grafoil packing is used for high-temperature applications. A leakage rate of 8-10 drops per minute is required to lubricate the packing-shaft interface.

Download the Seal Types Guide


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