Centrifugal pump OEMs declare they provide better parts, service, response and worth than aftermarket service corporations, but that isn’t all the time the case.
Until the early 1990s, OEM restore facilities worked solely on their merchandise, espousing the mantra, “We know our merchandise finest.” During the ‘90s, a lower in new product gross sales brought on OEMs to vary their story and boast that their outlets may work on any model of centrifugal pump. Suddenly, เกจวัดแรงดันแก๊สco2 utilized to all centrifugal pumps.
According to the web journal, World Pumps, six of the most important U.S. centrifugal pump manufacturers of the Eighties have been consolidated into one, Flowserve. Many U.S. legacy manufacturers are nonetheless manufactured by Flowserve. During the various mergers and acquisitions, the us Department of Justice compelled the sale of some brands to other producers. Products were disassociated from their designers.
Before the nice consolidation, every OEM had a chief engineer and several product designers who employed a holistic design course of, which thought-about the whole product, the interplay of its varied components, the user’s software and trade specs. When a consumer had a major drawback, the chief engineer was known as to sort it out. The lessons learned had been incorporated into future designs and centrifugal pumps evolved over many years.
Industry requirements, API 610 specifically, were developed by customers to simplify procurement of high quality tools and to improve pump reliability. It is a compendium of users’ experiences, which are often expensive experiences. API 610 captures solutions to frequent centrifugal pump design issues and best-in-class design features.
Computers loaded with amazing software program have democratized engineering. When I was a design engineering supervisor at Pacific Pumps, I had physicists, mathematicians, metallurgists, engineers, drafters, doc managers and a big group of individuals to create and distribute microfilm. In the early 1980s, we added a Fortran programmer to our workers. Today, that talent and many skill units are on my desktop. Integral calculus is finished with a click on in MathCAD. Finite element analysis of structures, strain vessels and even shaft keyways are integrated into our stable modelers. Hydraulic element design software program feeds computational fluid dynamics analysis applications, lowering hydraulic design danger. Rotordynamic analysis software coupled with structural evaluation instruments solves — and hopefully prevents — vibration issues.
3D optical scanners and laser trackers provide accurate models of complicated shapes. Conhagen can duplicate any pump case in a single afternoon and improve it by the next week. It can produce a 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 fast delivery in most any metallic.
Conhagen has evolved from a repair shop to a producer that designs new centrifugal pumps or modifies existing pumps for specific functions. Unique designs provide the required hydraulic performance and mechanical robustness to minimize the entire cost of ownership. Two examples of case replacements are included in this editorial — a 4 stage, axial cut up, 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 issues. Conhagen designed and manufactured a model new case, shortening the distance between bearings from 37 3/4 inches to 30 5/8 inches.
Conhagen has been in business for eighty years. Its products embody detailed engineering calculations, manufacturing drawings, set up, operation and upkeep manuals, a one-year operation warranty and support for management of change reviews. It is big enough to be responsible, but sufficiently small to be responsive.
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