Garner Denver Elmo Rietschle Side Channel Vacuum Pump is reliable and delivers 20,000 operating hours between services and is virtually maintenance free. Frequency converters are used to control machine output and speed, which is advantageous in applications with variable operating loads. Machines that work with variable speed drive features improve suction and high differential pressures. Our side Channel Vacuum Pumps reduce energy consumption, improve reliability and uptime, eliminate pollution and provide cost savings solutions for a wide variety of applications.