A reader asks if a longer bend radius will help reduce elbow wear in a pneumatic conveying system that transports abrasive materials.
Elbows in this reader’s pneumatic conveying system need replacing on a weekly basis, with those at the line’s end and the silo’s top — both a safety hazard to access — needing the most frequent replacement. Columnist Mike Bradley explains that a longer bend radius can help alleviate part of the problem, as can reducing air velocity, installing wear-resistant linings, and installing certain bend geometries such as blind tees and specialty elbows.