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
affectivity. 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.

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.

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.

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.

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. Full technical information and support is available from your Thordon Distributor or Thordon Bearings Inc.