Ultra-High Vacuum Evaporators Employing Getter-Ion Pumps

Rolling Contact Fatigue in Ultra High Vacuum

Membrane-associated Ion Pumps

From the $Department of Pediatrics/Biochemistry, Vanderbilt University, Nashville, Tennessee 37232, the **Department of Molecular Biology, Vanderbilt University, Nashville, Tennessee 37235, the 11 Veterans Administration Medical Center, Boise, Idaho 83702, the Department of Medicine, University of Washington, Seattle, Washington 98185, and the IIRoswell Park Memorial Institute, Buffalo, New Yor...

Sputter-ion Pumps

The following paper outlines the working principles of sputter-ion pumps. The pumping mechanisms for reactive and inert gas species, as well as argon instability are explained. The operating pressure range, special designs for integrated linear pumps in accelerators and operational aspects are discussed.

NASH Vacuum Pumps for Wastewater Treatment Plants

Many larger wastewater treatment plants use Anaerobic Digestion, a bacterial process that is carried out in the absence of oxygen. Compared to the conventional activated sludge process, Anaerobic Digestion is more energy efficient, reduces dewatered biosolids by 7-12 times (as compared to conventional processes) and produces useful methane gas (biogas). Gardner Denver Nash liquid ring pumps and...

Sizing Vacuum Pumps for Cleaning Milking Systems

Early pipeline milking systems were commonly flooded during cleaning. Flood cleaning is practical for systems with small diameter milklines, short pipelines and few milking units. Flood cleaning becomes impractical as milkline diameter and length and the number of milking units is increased. Excessive water volume is required and the flow velocities and corresponding mechanical cleaning action ...