Centrifugal pump OEMs claim they supply higher components, service, response and worth than aftermarket service firms, however that isn’t always the case.
Until the early Nineteen Nineties, OEM restore facilities worked solely on their merchandise, espousing the mantra, “We know our products finest.” During the ‘90s, a decrease in new product sales brought on OEMs to alter their story and boast that their shops might work on any brand of centrifugal pump. Suddenly, their specific product data applied to all centrifugal pumps.
According to the web journal, World Pumps, six of the major U.S. centrifugal pump producers of the 1980s have been consolidated into one, Flowserve. Many U.S. legacy manufacturers are still manufactured by Flowserve. During the many mergers and acquisitions, the U.S. Department of Justice compelled the sale of some brands to other manufacturers. Products had been disassociated from their designers.
Before the nice consolidation, every OEM had a chief engineer and a number of other product designers who employed a holistic design process, which thought of the whole product, the interplay of its various parts, the user’s application and business specs. When a user had a big drawback, the chief engineer was called to type it out. เครื่องมือวัดความดัน discovered have been included into future designs and centrifugal pumps developed over a few years.
Industry requirements, API 610 specifically, 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 normally expensive experiences. API 610 captures options to frequent centrifugal pump design issues and best-in-class design options.
Computers loaded with superb software have democratized engineering. When I was a design engineering manager at Pacific Pumps, I had physicists, mathematicians, metallurgists, engineers, drafters, document managers and a large group of people to create and distribute microfilm. In the early Eighties, we added a Fortran programmer to our staff. Today, that expertise and lots of ability sets are on my desktop. Integral calculus is done with a click on in MathCAD. Finite factor evaluation of buildings, strain vessels and even shaft keyways are built-in into our solid modelers. Hydraulic element design software program feeds computational fluid dynamics evaluation packages, reducing hydraulic design threat. Rotordynamic evaluation software coupled with structural evaluation tools solves — and hopefully prevents — vibration issues.
3D optical scanners and laser trackers present accurate fashions of complicated shapes. Conhagen can duplicate any pump case in a single afternoon and enhance it by the following week. It can produce a brand new case or impeller casting in 5 – 6 weeks. The improvement of patternless molds — 3D printed sand molds — was the sport changer for Conhagen, yielding high fidelity, cheap price and quick supply in most any metal.
Conhagen has evolved from a restore shop to a producer that designs new centrifugal pumps or modifies present pumps for specific applications. Unique designs present the mandatory hydraulic performance and mechanical robustness to minimize the entire cost of possession. Two examples of case replacements are included in this editorial — a 4 stage, axial cut up, boiler feed pump’s carbon steel case was changed 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 model 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 products embrace detailed engineering calculations, manufacturing drawings, installation, operation and maintenance manuals, a one-year operation guarantee and assist for administration of change stories. It is large enough to be accountable, yet sufficiently small to be responsive.
Share