New thermoplastic polymer composites for pumps

Launched by EGC, the material looks to address the maintenance, upgrade and repair needs of pumps.

EGC Critical Components, a Texas-based manufacturer of high-performance thermoplastic performance-critical components, has launched its dures brand of materials, which is a new family of proprietary thermoplastic polymer composites developed specifically for the manufacture of bushings, bearings and wear rings in pumps handling a wide range of liquids, including those that contain solid matter.

The new material, produced exclusively by EGC, is in stock and immediately available to address the maintenance, upgrade and repair needs of pumps operating in a wide range of performance demanding environments including refineries, chemical plants and pipelines. In the refinery environment, EGC estimates that approximately 60% of pumps currently in operation can benefit from this material.

The dures family of polymer solutions for pump applications includes four products with unique performance characteristics: dures 150, dures 250, dures A451 and dures XPC2. dures 150 and 250 are the most recent additions to this family of composite formulations. They were developed to meet the need for outstanding chemical, thermal shock and impact and abrasive resistance, with a temperature range of 150F and 250F.

dures A451, produced from chop carbon fiber and reinforced compression molded PEEK, is used in the manufacture of bushings, bearings and wear rings with excellent chemical resistance, non galling and non seizing properties. However, it is not suited for abrasive applications or operating temperatures above 275F. In comparison, dures XPC2, formulated from continuous carbon fiber with PEEK base polymer, is recommended and approved for operating temperatures up to 550F making it most appropriate for use in boiler feed and process pumps. dures A451 and XPC2 have been successfully used by industry for decades.

"Pump operators using dures materials can now set much tighter equipment clearances, enhancing efficiency and savings in lifecycle costs," said Michael Boylan, general manager for EGC. "Also, because we have a laboratory and testing facility on the same campus as our manufacturing center, we have full control over the design, specification, quality and performance of materials. For applications where the slightest variance can produce unacceptable results, this ensures the highest standards are always met."