Transcription of POSITIVE DISPLACEMENT PUMPS-PERFORMANCE …
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POSITIVE DISPLACEMENT PUMPS-PERFORMANCE …
POSITIVE DISPLACEMENT PUMPS-PERFORMANCE AND APPLICATION. by David B. Parker Manager, R&D Testing Warren pumps Incorporated Warren, Massachusetts from Proceedings of 11th International Pump Users Symposium. Copyright 1994. All rights reserved. Reprinted with permission of the Turbomachinery Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77840-3123. POSITIVE DISPLACEMENT pumps - performance AND APPLICATION. by David B. Parker Manager, R&D Testing Warren pumps Incorporated Division of IMO Industries Warren, Massachusetts PD pumps come in many designs and operating ranges, but they all work on the same principle. An increasing volume is opened to suction, filled, closed, moved to discharge, and displaced. The delivered capacity is nearly constant throughout the discharge pressure range. This constant capacity will intersect a system curve at a defined point, allowing a high degree of system control.
Relief valves are required in Systems with PD pumps. A centrifugal pump can operate briefly without damage against a closed discharge valve and only generate a pressure equal to its shutoff head.
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