Rotary Valve Rotor Clearance Guide

Rotor clearance is one of the most important factors in rotary valve sealing. Too large a gap increases leakage; too small a gap can cause scraping, jamming or heat-related expansion problems.

Why Clearance Matters

• It controls air leakage across the rotor
• It affects powder retention and pocket filling
• It changes with wear, temperature and material buildup

Selection Factors

• Abrasive materials may need wear-resistant surfaces
• High temperature operation needs expansion allowance
• Pneumatic conveying needs better airlock performance than simple gravity discharge

Maintenance Signals

• Rising air consumption
• Reduced discharge stability
• Scraping marks, abnormal sound or metal dust

FAQ

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