CPI materials for pump wear parts (CPI Materials 182 & 183) are proprietary polymer alloys designed for pump bushing wear rings, guide bushings and thrust washers in liquid pumps.

The these exclusive polymers are intended to reduce diametral clearance on pump wear parts without the risk of damage to metal components. The properties of these materials are designed to help avoid catastrophic pump failures caused by dry-run start up or excessive vibration.

Materials for Pump Wear Parts Brochure (English)

Materials for Pump Wear Parts Brochure (English) A4


  • Dry running tolerance
  • Protection of pump shaft 
  • Reduced clearance minimize re-circulation 
  • Easy to machine, no treatment required 
  • Non-galling and non-seizing properties 
  • Low friction coefficient means long running life 
  • According to API 610 
  • Excellent chemical compatibility

Mixers and Agitators

Due to premature wear of many PTFE based bearings, CPI materials for pump wear parts are ideally suited for use in agitator and mixer bearings due to its chemical and frictional resistance, combined with excellent dimensional stability and improved running performance.

Problem Solving Solutions

CPI materials for pump wear parts have a low coefficient of thermal expansion and provide excellent resistance to chemical attack as well as protection against impacts, thermal shocks, and hydrolysis. Applications using CPI materials significantly increase hydraulics, improving pump performance with reduction in energy consumption and reduced wear, which is reflected in maintenance and operating costs.

Applications of CPI Materials for Pump Wear Parts

CPI materials for pump wear parts have been successfully installed and operate in line shaft bearings, impeller wear rings, thrust washers on vertical pumps - (single or multi-stage) barrel pumps, API, bearings on Archimedes screws and horizontal pumps.