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Today's
business climate demands reliability, cost effectiveness,
flexibility & technical support. When specifying
and purchasing pump bearings, Thordon is the proven
choice for value and performance for both OEM and
maintenance water lubricated pump bearing applications.
Originally developed over 30 years ago for use as
a high performance pump bearing. Thordon is an electrometric
polymer alloy that provides exceptional wear life.
Today available worldwide, all Thordon bearings
are manufactured to ISO 9001 Quality System requirements
ensuring high quality and consistency |
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Thordon
SXL:
The
preferred choice for dry start-up operation,
SXL offers a lower dry coefficient of friction
and better wear life and
abrasive resistance compared to XL. Thordon SXL
bearings have
been successfully used in many deep well pumps
where start-up
dry running periods in excess of one minute are
experienced.
SXL bearings are available in a wide range of
sizes in both grooved
and ungrooved configurations.
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Thordon
XL:
The standard grade for Thordon
pump bearing
applications, XL offers a good balance between
long life, low dry coefficient of friction, reasonable
abrasion resistance and cost
effectivity. Limited dry running capability -
10 to 15 seconds - is
possible and optimum performance is achieved operating
in relatively
clean non-abrasive fluids. Thordon XL bearings
are available in a wide range of sizes in both
grooved and un-grooved configurations.
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Thordon
Composite:
Specifically
formulated to provide outstanding wear life in
abrasive operating conditions, Composite often
outlets other bearings by a factor of several
times. Extremely cost effective in abrasive conditions,
Thordon Composite exhibits a dry coefficient of
friction lower than rubber. Composite bearings
are available in a wide range of sizes in grooved
configurations only.
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Thordon-Metal
Backed Bearings:
Thordon
bearings can be produced by polymerizing any of
the three Thordon grades into a metallic housing.
Use of a Thordon lining in a metallic housing
produces a stiffer bearing that requires significantly
less running clearance than other non-metallic
bearings. Originally developed to meet the needs
of the nuclear power industry, this design is
now specified in many other applications.
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Application
Information :
Fluid compatibility : Thordon
bearing can be used in a wide range of chemicals
including oil, and mild acid or caustic solution
(ph5-10). Thordon's corrosion resistance is superior
to metallic bearing materials commonly used in
pumps.
Temperature :
Thordon has a maximum operating
temperature of 60°C (140°F) in water.
Running Clearances :
The running clearances for
Thordon pump bearings vary and are determined
by the grade of Thordon specified, the design
of the bearing, the operating conditions and the
method of installation. Varying the installation
method and the design of the bearing are the most
direct ways to influence running clearances. When
tight impeller clearances are required, a Thordon-metal
backed design is recommended.
Impeller Wear Rings :
Thordon SXL lined
wear rings provide extended wear life and prevent
metal to metal contact eliminating flat spotting
of the impeller.
Controlled-Flow Bearings
: In certain
applications a design that controls or directs
the flow of water through the bearing is desirable.
When forced cooling water is being used, a restriction
of the lubrication grooves at the top of the bearing.
Abrasives are flushed from the bearing much more
effectively compared to un-directed flow. A restriction
may also be used to control the amount of water
flowing past a bearing to an external seal. For
full technical information and support is contact
Shaw Engineering Corporation.
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