Technology Sourcebook
www.foodengineeringmag.com/articles/94764-drum-motor

Drum motor
November 3, 2015
Used for driving modular or extruded belts, the Van Der Graaf all-stainless steel drum motor has a vented option that allows the motor to work with zero pressure inside the drum and eliminates the internal pressure that can develop there.
Van Der Graaf Corp.; 888-326-1476; www.vandergraaf.com