Sealless Magnetic Drive Pumps for Industrial Applications

Chemical transfers. Precision temperature controls. Cleaning solutions. Industrial settings involve myriad operations that require the safe handling of harsh, toxic or corrosive fluids. Not every piece of equipment is up to these tasks. Robust solutions are necessary to ensure safety, reliability, and efficiency. To meet these demands, Finish Thompson offers a complete line of sealless magnetic drive pumps and drum and barrel pumps that are designed to withstand the harshest environments.

Typical Applications

  • Provide flow and pressure to chillers and heat exchangers
  • Recirculate cleaning solutions to clean metal before painting, powder coating or plating
  • Secondary containment in chemical sump applications
  • Transfer chemicals and rinse waters from sumps
  • Transfer fluids from drums and IBCs (totes)
  • Transfer from bulk storage to process
  • Unloading of rail cars and tanker trucks


Finish Thompson Mag Drive Pumps Prove Ideal for Chemical Transfer

“I wanted a pump that didn’t leak, and the Finish Thompson pump fit the ticket,” explains Bruce Gray, Southern States Cooperative Plant Manager.

“I wanted a pump that didn’t leak, and the Finish Thompson pump fit the ticket,” explains Bruce Gray, Southern States Cooperative Plant Manager.

Gray has good reason for leak concerns. He’s using the Finish Thompson pump to transfer phosphoric acid. “The pump is outside on the railroad track, and I need the right pump to prevent environmental pollution,” Gray notes.

As one of the largest farm supply and service cooperatives in the country, Southern States Cooperative provides a variety of farm inputs, including fertilizer. The phosphoric acid that is unloaded from rail cars by a Finish Thompson ULTRAChem® pump is used in the production of this fertilizer.

ULTRAChem Pump Offers Triple Play

Why is the ULTRAChem Series mag drive pump ideal for this application?

“The pump offers three benefits,” reports the local distributor who supplies the Finish Thompson pumps for Southern States. “The first is the pump’s design for chemical resistance. If you’re pumping a harsh chemical, like phosphoric acid, the ULTRAChem pump has the liner to protect the pump from corrosion. The second benefit is the mag drive. It doesn’t have a mechanical seal that will wear out. There is a complete barrier between the wet end of the pump and the drive of the motor. The outer drive magnet couples with the interior, eliminating the need for a mechanical seal.

“The third benefit,” the distributor explains, “is the ANSI design. As an ANSI-dimensional pump, it is designed to fit universally to other products without changing any piping.”

The second benefit – the magnetic drive – offered the most appeal for the Southern States application. “We went with Finish Thompson because of this technology,” reported the distributor. “The pump they were using had a mechanical seal, and eventually, the fluid will leak out just from normal use. This isn’t the case with the magnetic drive.”

Will Weathers, Finish Thompson Regional Manager, adds, “If you use a pump with a mechanical seal, you’ll have to continually replace it. The seals may wear out a couple of times a year. Depending on the chemical application, this replacement could involve the use of hazmat suits and several hours of down time. The magnetic drive of our pumps offers a long-term, safer solution. The ANSI standard adds further appeal, as it makes installation easier.”

The distributor agrees, “Southern States has been using the UC438 pump for nearly four years, and they have had no issues whatsoever with it. They’ve also added a Finish Thompson power monitor to protect the pump from running dry. If there is a loss of fluid elsewhere, or the valve gets shut down while the pump is running, the M20 power monitor will shut off the pump to protect it from overheating.”

“Finish Thompson has been very responsive whenever I need anything,” Gray says. The distributor reports similar experiences, noting, “As a whole, Finish Thompson is one of the best for service, responsiveness, and delivery. I feel very confident with their product line and their support.”

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Pump Details

Magnetically coupled, sealless centrifugal pumps. While NOT manufactured from FDA compliant materials, Finish Thompson DB Series and SP Series pumps are designed from the ground up to pump corrosive chemicals.

  • No mechanical seal – Powerful rare earth magnetic drive system eliminates the troublesome mechanical seal.
  • Corrosion resistant – Engineered for the most aggressive liquids, manufactured from polypropylene or PVDF.
  • Run dry ability – Makes them less prone to operator error or system upset.
  • Self-priming option – SP Series pumps can lift fluid from as deep as 25 feet (7.6 meters) below the pump or can pull liquid out of the top of a tank eliminating through-the-sidewall bulkhead fittings.


  • Multi-stage design – to produce much higher heads at lower flow rates than similarly sized single-stage pumps.
  • Performance – Heads up to 300 feet (91.5 meters) are possible, with a minimum flow rate of one gpm (0.23 m3/hr) and a maximum flow rate of 69 gpm (15.7 m3/hr).
  • No mechanical seal – Powerful rare earth magnetic drive system eliminates the troublesome mechanical seal.

Engineered for extreme reliability in the most extreme chemical processing applications, Finish Thompson’s ULTRAChem® pumps are magnetically driven, ANSI dimensional pumps. They are constructed from tough ductile iron with ETFE lining for superior corrosion resistance.

  • Sealless design – Powerful neodymium magnets drive the impeller through a carbon-filled ETFE lined barrier for dependable, leak-free operation.
  • Fully supported shaft and self-aligning dual bushings – designed for optimum alignment to prevent premature wear.
  • Complete encapsulation of inner drive magnets in ETFE – for ultimate corrosion protection.

Finish Thompson drum pumps are extremely versatile and are not just for use in in drums. A wide range of tube lengths allow them to be used in drums, barrels, totes, IBCs (intermediate bulk containers) and other container sizes.

  • PP, PVDF or 316SS tubes – Select based on your application
  • Built-in hose and cord clips – Specific models
  • ODP (open drip proof), TEFC and air motor drive options – lithium ion battery powered motor on select models

  • PF Series

      • High performance sealless pump
      • Unique double suction impeller provides high flow rates and high discharge pressure
      • Viscosity up to 2,000 cP
      • Acids, bases, plating solutions, water treatment chemicals, cleaners<


  • EF Series

    • An ideal replacement for hand pumps
    • Integral strainer (EFP/EFV only)
    • Built-in hose, cord clips (EFP/EFV only)
    • Light acids and bases, plating solutions, sodium hypochlorite, cleaners, coolants