Why use an OEM for centrifugal pump repairs?

Centrifugal pump OEMs claim they supply higher elements, service, response and worth than aftermarket service firms, but that isn’t all the time the case.
Until the early Nineties, OEM restore facilities labored exclusively on their products, espousing the mantra, “We know our merchandise best.” During the ‘90s, a lower in new product sales caused OEMs to vary their story and boast that their outlets could work on any brand of centrifugal pump. Suddenly, their particular product information applied to all centrifugal pumps.
According to the web journal, World Pumps, six of the main U.S. centrifugal pump manufacturers of the Eighties have been consolidated into one, Flowserve. Many U.S. legacy manufacturers are still manufactured by Flowserve. During the numerous mergers and acquisitions, the U.S. Department of Justice forced the sale of some manufacturers to different manufacturers. Products were disassociated from their designers.
Before the great consolidation, each OEM had a chief engineer and several product designers who employed a holistic design process, which thought of the whole product, the interplay of its varied parts, the user’s software and industry specifications. When a user had a major drawback, the chief engineer was called to sort it out. เกจวัดแรงดันดิจิตอลราคา learned were integrated into future designs and centrifugal pumps developed over many years.
Industry standards, API 610 particularly, were developed by users to simplify procurement of high quality gear and to enhance pump reliability. It is a compendium of users’ experiences, that are often costly experiences. API 610 captures solutions to widespread centrifugal pump design points and best-in-class design features.
Computers loaded with superb software program have democratized engineering. When I was a design engineering supervisor at Pacific Pumps, I had physicists, mathematicians, metallurgists, engineers, drafters, document managers and a big group of people to create and distribute microfilm. In the early Eighties, we added a Fortran programmer to our staff. Today, that expertise and many skill units are on my desktop. Integral calculus is completed with a click on in MathCAD. Finite element analysis of structures, pressure vessels and even shaft keyways are built-in into our stable modelers. Hydraulic element design software feeds computational fluid dynamics evaluation programs, lowering hydraulic design risk. Rotordynamic evaluation software program coupled with structural analysis tools solves — and hopefully prevents — vibration issues.
3D optical scanners and laser trackers present correct fashions of complicated shapes. Conhagen can duplicate any pump case in one afternoon and improve it by the subsequent week. It can produce a model new case or impeller casting in five or six weeks. The development of patternless molds — 3D printed sand molds — was the game changer for Conhagen, yielding excessive fidelity, reasonable price and quick delivery in most any steel.
Conhagen has developed from a repair shop to a manufacturer that designs new centrifugal pumps or modifies current pumps for particular functions. Unique designs provide the mandatory hydraulic efficiency and mechanical robustness to attenuate the entire price of ownership. Two examples of case replacements are included on this editorial — a 4 stage, axial split, boiler feed pump’s carbon steel case was replaced with a CA6NM casting. The second example is a single stage between a bearings pump that suffered rotor dynamics points. Conhagen designed and manufactured a new case, shortening the space between bearings from 37 3/4 inches to 30 5/8 inches.
Conhagen has been in business for eighty years. Its merchandise include detailed engineering calculations, manufacturing drawings, installation, operation and upkeep manuals, a one-year operation warranty and help for administration of change reports. It is large enough to be accountable, yet sufficiently small to be responsive.
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