S-Type External Pneumatic Ball Vibrators develop frequencies of up to 35,000 RPM and they are used wherever powdery materials have to be moved. S-type Ball Vibrators are installed on bins to prevent bridging or rat holing, and for the improvement of material flow on chutes, screens and vibrating tables. S-type Ball Vibrators consist of an anodized aluminum body inside which a steel ball rotates on a specially hardened and ground steel ring. For operation a 2/2-way-valve and filtered compressed air are required. Maintenance-free; operating temperature from 32°F to 390°F; oil-free operation possible; high centrifugal force; low air consumption; standard ATEX II3D certified.