Pentair Unit Awarded Patent for Submersible Pump Motor Innovation

21.02.2001

ST. PAUL, Minn., Feb. 20 /PRNewswire/ -- Pentair (NYSE: PNR) announced

today that its Fairbanks Morse unit has received a government patent for a

newly developed submersible pump motor with a unique cooling method that

allows it to operate continuously out of the water without overheating.

Traditional submersible pumps use the fluid in which they are immersed as

a coolant. The new Fairbanks Morse closed-loop system contains a cooling

medium that is constantly circulated around the motor. The new system,

granted patent number #6,121,698 by the U.S. Patent and Trademark Office,

contains a circulating impeller, a heat exchange plate, a jacket surrounding

the motor housing, and an expansion chamber that maintains a constant

pressure.

"Pumps with the new motor can be mounted in dry areas for ease of

observation and maintenance, although these areas often are prone to

flooding," said James H. Sexton, director of development engineering for

Fairbanks Morse. "The built-in submersible feature allows the pumping unit to

continue to function during the flooding, thus providing continuous

environmental protection."

Based in Kansas City, Kan., Fairbanks Morse is one of several pump brands

aligned under the Pentair Pump Group. Since 1995, Pentair has expanded beyond

its original pump business to become a premier, diversified water equipment

company that delivered compound annual growth of 45 percent in sales and

55 percent in profits from 1995 through 2000.

Pentair ( http://www.pentair.com ) is a St. Paul-based manufacturer whose

core businesses compete in Tools, Water Technologies, and enclosures markets.

The company employs 13,000 people in more than 50 locations around the world.

For more information, contact Mark Cain of Pentair, Inc., 651-639-5278.

Source: Pentair plc.

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