29 March 2012
29 March 2012
Createc has devised a revolutionary set of Creacomp PT (Pump Type) composite materials that combine Victrex PEEK polymer with carbon fibre.
According to Victrex, these composites have been successfully used to replace metals in the manufacture of parts subject to intense wear in pumps, resulting in enhanced process reliability, greater energy efficiency and a consequent cost savings.
Victrex explain that most heavy industrial pumps are designed and fitted with sets of replaceable components subject to wear (e.g. bushings, case and impeller wear rings). These wear parts are designed to support and stabilise the pump rotor and offer protection to the shaft, impellers and pump casing by absorbing wear and abuse. In addition to these roles, wear rings act as internal seals and, to prevent frictional contact, maintain a gap between the impeller and pump casing. They say it is essential to keep this gap or clearance at an optimum value to improve efficiency.
Victrex say that testing by Createc has revealed a significant gain in energy efficiency and cost savings when composite manufactured wear rings are used. The gain in efficiency of a typical multistage process pump is 4-5% when clearance is reduced by 50%. A test of an upgraded six-stage process pump revealed an improvement in efficiency from 82.5% to 87%, reducing the cost of electrical power consumption by $105,000 per year. As a result, pump manufacturers are increasingly using Victrex PEEK polymer-based thermoplastic composites such as Creacomp for wear part components to improve efficiency and save energy costs.
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