PD Pump Fundamentals, Design and Applications (Part Four ...
网页2009年4月21日 — Reciprocating Pump Overview. Since the third century B.C. when an Alexandrian named Ctesibus built a basic hand pump that could transfer water, reciprocating pumps have played a significant role in the development of the modern world. Today, reciprocating pumps have developed into technically advanced machines capable of …
Positive Displacement Pumps (Part One): Reciprocating Pumps
网页2009年8月31日 — Reciprocating Pumps. The piston pump is one of the most common reciprocating pumps. Prior to the development of high speed drivers, which enhanced the popularity of centrifugals, it was the pump of choice for a broad range of applications. Today, they are most often seen in low-to-moderate flow applications that require pressures up …
Reciprocating Piston Pumps & Their Applications
网页2024年5月6日 — These reciprocating piston pumps are also called stick pumps, as the pumping section resembles a long stick that is intended for use with industry-standard containers. IMAGE 1 (left): Upstroke of the two-check piston pump; IMAGE 3 (right): Downstroke of the two-check piston pump. Concept & Theory
The Basics of Reciprocating vs. Centrifugal Pumps
网页2019年8月21日 — The demand for the duties that fall within the performance range of reciprocating pumps is rising. Process flows are falling while the pressures required are increasing. Engineers are generally familiar with operating principles, performance curves and selection criteria for centrifugal pumps, but the training and knowledge around the …
The Hydraulic Performance of Reciprocating Machines
网页2021年8月30日 — A reciprocating pump in a high-head, low-flow application could have a high efficiency (90%) compared to the single-digit efficiency of an equivalent centrifugal machine. Positive displacement reciprocating pump net positive suction head required (NPSHr) varies as a function of flow that is determined by speed.
10 Key Facts About Reciprocating Pumps - Pumps & Systems
网页2015年7月7日 — In general, a reciprocating pump is more efficient than a centrifugal pump. Reciprocating machines are generally applied on low-flow/high-head service. Centrifugal pumps can have efficiencies as low as 40 percent on low-flow/high-head service. A reciprocating machine can have efficiencies greater than 90 percent on the same service.
Reciprocating Pumps vs. Multi-Stage Centrifugal Pumps
网页2009年6月8日 — Reciprocating Pump. In regards to the reciprocating pump, there are only two efficiency losses which need to be considered, namely Volumetric and Mechanical. Volumetric efficiency loss is induced by slippage through valves, ratio of liquid chamber volume at end of stroke to plunger/piston displacement volume, and liquid compressibility.
Reciprocating Pumps - Pumps & Systems
网页This pump type's unique system design requirements are often ignored or misapplied, which affects reliability and operation. Reciprocating Pumps Power Pump Myths
Actual NPSH Test - Reciprocating Pump and What is a Safe NPSH …
网页2010年1月3日 — He authored a book on reciprocating pumps, several magazine articles and the two pump sections in Marks' Handbook (11th Edition). He has been awarded six patents. Henshaw is a registered professional engineer in Texas and Michigan, is a life fellow of the ASME and holds engineering degrees from Rice University and the University of Houston.
What Is Acceleration Head and How Can it be Calculated?
网页2021年3月8日 — What is acceleration head and how can it be calculated? Acceleration head is a primary concern in reciprocating pump systems, due to the acceleration and deceleration of the liquid in the suction piping of these types of pumps. An example of the pulsating from a reciprocating pump is shown in Image 1. This shows how the flow starts …