Sealless Magnetic Drive Pumps for Printed Circuit Boards & Electronics Applications

When it comes to electronics, manufacturers must meet stringent standards. The slightest imperfections can render their products worthless. To ensure value, manufacturers must choose equipment that adds accuracy and reliability to their systems. With a diverse line of precision sealless magnetic drive pumps and drum pumps, Finish Thompson is ready to equip electronics manufacturers for success.

Typical Applications

  • Filter solutions to keep them clean
  • Provide pressure and flow to spray bars
  • Provide high flow at low pressure for flood bars
  • Pump DI water for cleaning & other processes
  • Eliminate microbubbles to improve board quality
  • Transfer chemicals and rinse waters from sumps
  • Transfer new chemicals from drums and IBCs (totes)

Pump Details

DB Series, SP Series

Magnetically coupled, sealless centrifugal pumps. Finish Thompson DB Series and SP Series pumps are designed from the ground up to pump corrosive chemicals for printed circuit boards and electronics manufacturing.

  • 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 optionSP 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.

MSDB Series


  • 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.

UC Series

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.

VKC Series

Vertical magnetic drive sealless centrifugal pumps, VKC Series pumps from Finish Thompson offer excellent corrosion resistance and magnetic drive reliability. Multiple impeller diameters and column lengths offer enhanced hydraulic selection and application flexibility.

  • True sealless vertical pump design magnetic drive – eliminates the need for wetted shaft bearings.
  • Sealed airtight column – helps prevent shaft and motor corrosion and reduces environmental emissions.
  • No back impeller – single impeller prevents aeration and eliminates microbubbles in fluid being pumped.
PFS series drum pump

Drum Pumps

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 – On select 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, water treatment chemicals, cleaners, sanitary

EF Series

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

A Case in Point

circuit board manufacturer case study
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Circuit Board Manufacturer Specs Finish Thompson Sealless Magnetic Drive Pumps for Reliability and Versatility

When you’re manufacturing custom circuit boards for demanding aerospace, defense, medical and telecom industry applications, you need cutting-edge solutions. As a global leader in printed circuit board manufacturing, Summit Interconnect is known for its stringent standards for product quality and reliability. Their innovative methods deliver some of the most advanced circuit board designs on the market.

How does Summit Interconnect maintain their leading reputation? By using only the best system components in their manufacturing processes.

“They were looking for pumps that would last,” recalls the local distributor. “I presented the Finish Thompson ULTRAChem® magnetic sealless pump series, and now they’ve been running for over 17 years.”

“Finish Thompson is well regarded in the industry,” he continues. “I could confidently recommend them because I know their products meet the requirements of demanding applications.”

Heavy-Duty Solution for Heavy-Duty Production

Summit Interconnect installed the Finish Thompson ULTRAChem (UC) Series pumps for their plating bath application. The sealless magnetic drive pumps are used in an automated machine that runs 24/7 to create circuit boards.

These centrifugal chemical pumps allow their systems to circulate and agitate the fluids used in the manufacturing process. This constant motion is necessary for the proper adherence of plating chemicals, so any down time due to pump failure can be costly.

“UC Series pumps are a great solution for this application, because they meet the customer’s reliability requirements. They don’t have to constantly run a preventative maintenance program on these pumps,” explains Rich McDevitt, Western Regional Manager for Finish Thompson. “There’s no upkeep. They can run 24/7.”

A second UC Series advantage is its ETFE lining. The superior chemical resistance and corrosion resistance of the lining is much tougher than on other types of centrifugal chemical pumps.

“For these types of applications, some manufacturers use a lighter-duty pump, but Summit Interconnect wanted something tougher,” notes McDevitt. “That’s exactly what they got.”

The distributor adds, “The cleaning tanks all have different chemicals, and some of the applications involve high temperatures. The Finish Thompson ULTRAChem sealless magnetic drive pumps are designed for versatile use, including different chemistries and high temperatures, so they were a good solution to offer when Summit was first setting up this line.”

That was 2002, and the pumps are still running.

Download this case study

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