Modern Pumping Today December 2024 - 29

T
op pump manufacturers
specialize in motor cooling
technologies that enhance
performance and durability.
These systems are intended to
perform in various applications,
such as sewage and wastewater
management, and are built to
require minimal maintenance.
Tsurumi Pump's robust motor
cooling engineering is at the heart
of its products' reliability and
longevity. The company's distinct
designs enable users to address
specific applications and conditions,
ensuring maximum performance.
Tsurumi offers four main motor
cooling design methods: side
channel, flow thru, water jacket,
and a closed-loop cooling jacket
design with internal recirculation.
All play a critical role in preventing
overheating and maintaining
optimal temperatures that support
motor performance and durability.
" Effective motor cooling is
essential for all submersible pumps
to prevent catastrophic damage, "
says Pat Donahue, applications
engineer at Tsurumi. " When motor
temperatures exceed the ratings
of critical components such as
seals, gaskets, and O-rings, the risk
of failure increases significantly.
Tsurumi provides a range of motor
cooling solutions tailored to meet
the diverse needs of the various
pump markets we serve. "
JACKET DESIGNS
One of Tsurumi's most impressive
motor cooling methods is its
patented closed-loop cooling jacket
design with internal recirculation.
This system uses a glycol-water
mix that flows across the motor
surface, providing efficient cooling
while preventing contamination
from wastewater. Key advantages
of this technology include effective
temperature control to prevent
overheating and reduce thermal
stress on components, resulting in
extended pump life.
" The closed jacket cooling
method is particularly beneficial
WWW.MPTMAG.COM
in sewage and wastewater
applications, where solid-laden
water can clog traditional cooling
methods, " Donahue explains.
" The Avant MQ's design ensures
reliable cooling without the risk
of blockages. Maintenance for the
cooling jacket is minimal, requiring
coolant changes only when
mechanical seals need replacement
or after specific repairs. "
Another cooling method is
Tsurumi's water jacket design,
which incorporates a water jacket
surrounding the motor casing. A
portion of the water is allowed to
flow completely around the motor
on its way to the side discharge.
This design feature enables the
unit to operate at low water levels
for extended periods of time. This
method is used in several of the
company's most popular models,
including GPN, GSZ, and BK.
SIDE CHANNEL AND
FLOW THROUGH
While cooling jacket designs offer
unique benefits, Tsurumi's side
channel and flow-thru motor cooling
methods are equally reliable,
and both are widely used in the
manufacturer's pumps.
Side channel cooling directs
pumped water to flow around the
motor, absorbing heat generated
by the motor before being
discharged from the pump's side.
This method ensures continuous
cooling, maintaining the motor's
optimal operating temperature
and preventing overheating. Even
in run-dry conditions, air will be
forced through the channel, thereby
cooling the motor.
The flow-through cooling design
includes both an inner and outer
motor casing. This allows water to
flow completely around the motor
before reaching the top centerline
discharge. This design enables
the unit to function at low water
levels for long periods and allows
for a reduced overall diameter of
the pump, making it suitable for
installation in tight spaces.
MPT
Tsurumi (America), Inc., a division
of Tsurumi Manufacturing, was
founded in 1979. Headquartered
in Glendale Heights, Illinois,
Tsurumi (America), Inc. has
bases in Quebec, Canada; El
Paso, Texas; and Salt Lake City.
Globally, Tsurumi is active in
forty-five countries and has
been an innovator in the pump
industry since 1924. Tsurumi
(America) is a provider of
leading pumping technology in
construction, civil engineering,
mining, industrial wastewater,
domestic wastewater, sewage
treatment, flood control, and
scenery creation fields. All
Tsurumi products are backed
by independent, third-party
verification. Beyond leading
pump technology, Tsurumi
(America) is recognized for its
robust distribution network
and one of the largest on-hand
inventories in North America.
For more information, visit
www.tsurumipump.com.
EFFICIENT HEAT
MANAGEMENT
Both cooling methods, along with
Tsurumi's cooling jacket designs,
ensure efficient heat management
and consistent pump performance,
even in demanding environments.
" Tsurumi's cooling styles
generally allow pumps to operate
effectively at lower levels than
similar models without jackets, "
Donahue adds. " With the
growing popularity of sewage
and wastewater dry pit lift station
applications, where the pump is
in a separate chamber from the
wastewater, maintenance is more
accessible. Obviously, there is
no water in a dry pit, so cooling
must come from methods such as
cooling jackets. "
DECEMBER 2024 | 29
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Modern Pumping Today December 2024

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