The Robinair VacuMaster High Performance Vacuum Pumps, Nos. 15115, 15310 and 15510, are engineered for air conditioning and refrigeration service and is built for fast, thorough evacuation. The one-stage rotary vane design provides powerful, quiet, high vacuum capability and ensures moisture removal, while the high pumping capacity reduces evacuation time. The intake screen prevents foreign matter from entering the pumping chamber, and an internal exhaust filter separates oil vapor from the exhaust flow. Aluminum housing and rotary vanes keep the pump weight low, making it easy to carry.