From Thermo Fisher Scientific - Thermo Scientific Baths, Circulators & Chillers

Rotary vane Positive Displacement (PD) pumps may be the most commonly used pumps in re-circulating chillers today. Performance and low cost have made them the favored pumps for a variety of applications. Turbine (TU) pumps are also used in re-circulating chillers, however, due to their higher initial cost often times PD pumps are selected over TU pumps where flow and pressure requirements can be met by a PD pump.

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Topics of Interest

Positive displacement pumps (PD pumps) were created to meter or transfer hard-to-handle fluids like corrosive, viscous, shear sensitive, or abrasive slurries at various speeds without pressure-induced...

Many factors must be considered before choosing the proper pump for a specific application. Incorporating all these considerations into the pump selection process can seem daunting. Many technologies...

Unlike their diaphragm, vane, gear and lobe counterparts, peristaltic pumps have no valves, seals or glands - the cause of most blockages, leaks and contamination issues. As a result, peristaltic...

CHAPTER LIST Chapter 18: Performance of Positive Displacement Pumps Chapter 19: Pumps for Sewage Collection Systems Chapter 20: Pumps for Sewage Treatment Plants Chapter 21: Storm Water...

3.1 Objectives After reading this chapter, the student will be able to: Distinguish between positive and non-positive displacement pumps Understand the principle of operation of gear, vane...