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Fairfield, NJ, United States

The Flowserve Corporation is an American multinational corporation and one of the largest suppliers of industrial and environmental machinery such as pumps, valves, end face mechanical seals, automation, and services to the power, oil, gas, chemical and other industries. Headquartered in Irving, Texas, which is a suburb of Dallas, Texas, Flowserve has over 15,000 employees in 51 countries. Flowserve sells products and offers aftermarket services to engineering and construction firms, original equipment manufacturers, distributors and end users. The Flowserve brand named originated in 1997 with a merger of BW/IP and Durco International.On August 21, 2007, Flowserve Corporation was recognized by CIO magazine as one of the 2007 CIO 100 Award Honorees. Wikipedia.

Voyles M.,Flowserve Corporation
Vibration Institute Annual Training Conference 2013

This paper discusses high transient shaft vibration and tripping of a multi-stage centrifugal pump. The service is boiler feed water and the pump was reported to only have issues during some start-up actions. Vibration data will be analyzed in this paper. Field inspection of the pump and rotor-dynamic theory will be used to describe the cause of the vibration problem. The solution and results are provided to complete the discussion. Source

Westra R.W.,University of Twente | Westra R.W.,FMC Technologies | Broersma L.,Flowserve Corporation | Van Andel K.,University of Twente | Kruyt N.P.,University of Twente
Journal of Fluids Engineering, Transactions of the ASME

Two-dimensional particle image velocimetry measurements and three-dimensional computational fluid dynamics (CFD) analyses have been performed on the steady velocity field inside the shrouded impeller of a low specific-speed centrifugal pump operating with a vaneless diffuser. Flow rates ranging from 80% to 120% of the design flow rate are considered in detail. It is observed from the velocity measurements that secondary flows occur. These flows result in the formation of regions of low velocity near the intersection of blade suction side and shroud. The extent of this jet-wake structure decreases with increasing flow rate. Velocity fields have also been computed from Reynolds-averaged Navier-Stokes equations with the Spalart-Allmaras turbulence model using a commercial CFD code. For the considered flow rates, the qualitative agreement between measured and computed velocity profiles is very good. Overall, the average relative difference between these velocity profiles is around 5%. Additional CFD computations have been performed to assess the influence of Reynolds number and the shape of the inlet velocity profile on the computed velocity fields. It is found that the influence of Reynolds number is mild. The shape of the inlet profile has only a weak effect at the shroud.Copyright © 2010 by ASME. Source

Paul C.,Fluid Machinery Research Inc. | Wang C.,Flowserve Corporation
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering

An overview of some popular rotary and reciprocating positive displacement (PD) pump types is given with the objective of presenting and comparing the respective sizing relationships and performance features. Reciprocating pumps discussed are the piston and plunger types. Rotary pumps addressed are gear (external and internal), vane, lobe, screw, and liquid ring pumps. To put the re-lative pump sizes in perspective, attention is fixed on the rotors or reciprocating elements of PD pumps, just as impellers indicate the sizes of rotodynamic pumps. The size of a PD pump is found from a dimensionless combination of displacement flow rate, rotative speed and diameter. The flow rate, head (or pressure rise) and power are related through the component efficiencies. The cavitation coefficient, often close to unity, connects the rotor tip speed or piston speed with the required NPSH, which can also be affected by the pressure rise of the pump due to leakage across the internal clea-rances. Operational effects due to cavitation, ingestion of gas or abrasives, and viscous and non-Newtonian fluids are discussed. ©, 2014, Editorial Department of Journal of Drainage and Irrigation Machinery Engineering. All right reserved. Source

Schneider B.,Flowserve Corporation
Desalination and Water Treatment

Abstract: The Calder™ Energy Recovery Turbines (ERT’s) were installed and operated more than 10 years ago at the Larnaca SWRO plant, on the island of Cyprus. The ERT’s help drive the Flowserve membrane feed pumps. The increased need for potable water drove the owners to investigate improvement plans for the plant, while incorporating isobaric energy recovery devices. Rather than retrofitting the existing installation, a new plant design was chosen that increases the overall capacity while incorporating the most efficient energy recovery devices available on the market. By contracting with one supplier for both the DWEER™ energy recovery devices and all the main pump services, the engineering procurement and construction company was able to gain significant efficiencies not previously experienced. This paper outlines the development of the new SWRO plant at Larnaca and the benefits of having a one-supplier contract. © 2014 Flowserve Corporation. All rights reserved. Source

Tosin S.,TU Braunschweig | Friedrichs J.,TU Braunschweig | Dreiss A.,Flowserve Corporation
Journal of Turbomachinery

In many industrial areas, downsizing the pumping system is a decisive aim of the designers. The reasons could be multiple means; in a single-stage pump, increasing the power density of the pump means actually reducing the production costs. The main goal of this study was the comparison in terms of power density of a conventionally designed single-stage pump with a novel design concept based on the counter-rotating (CR) principle. In order to simplify the experimental investigations for the present study, the volute geometry was fixed instead of reducing the pump outflow diameters for a fixed design point. The energy concentration was then increased by raising the developed hydraulic power within the same envelope. The design of the impellers was carried out with an in-house design tool, based on inverse design method. Numerical results highlight the advantageousness of the new layout, in terms of power concentration, compared to the conventional impeller. Numerical predictions are also in significant agreement with the experimental investigation results, obtained in a specifically developed CR motors test rig. The experimental optimization of the rotational speed ratio of the CR impellers has shown the possibility to further increase the head in off-design condition and thereby the pump power density. © 2016 by ASME. Source

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