Centrifugal pump OEMs claim they supply higher elements, service, response and value than aftermarket service companies, but that isn’t at all times the case.
Until the early Nineties, OEM repair facilities labored completely on their merchandise, 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 retailers might work on any brand of centrifugal pump. Suddenly, their particular product knowledge applied to all centrifugal pumps.
According to the net journal, World Pumps, six of the most important U.S. centrifugal pump producers of the Eighties have been consolidated into one, Flowserve. Many U.S. legacy brands are still manufactured by Flowserve. During the various mergers and acquisitions, the united states Department of Justice forced the sale of some manufacturers to different manufacturers. Products have been disassociated from their designers.
Before the good consolidation, each OEM had a chief engineer and a number of other product designers who employed a holistic design process, which thought of the entire product, the interplay of its varied parts, the user’s application and trade specs. When a person had a big drawback, the chief engineer was referred to as to kind it out. The lessons learned were integrated into future designs and centrifugal pumps evolved over a few years.
Industry standards, API 610 in particular, were developed by customers to simplify procurement of high quality gear and to enhance pump reliability. It is a compendium of users’ experiences, that are normally costly experiences. API 610 captures options to widespread centrifugal pump design points and best-in-class design features.
Computers loaded with superb software have democratized engineering. When เกจวัดความดันpressuregauge was a design engineering supervisor at Pacific Pumps, I had physicists, mathematicians, metallurgists, engineers, drafters, document managers and a large staff of people to create and distribute microfilm. In the early 1980s, we added a Fortran programmer to our staff. Today, that expertise and many ability units are on my desktop. Integral calculus is completed with a click in MathCAD. Finite element analysis of constructions, pressure vessels and even shaft keyways are integrated into our strong modelers. Hydraulic part design software program feeds computational fluid dynamics analysis programs, decreasing hydraulic design risk. Rotordynamic analysis software coupled with structural analysis tools solves — and hopefully prevents — vibration issues.
3D optical scanners and laser trackers provide correct models of complex shapes. Conhagen can duplicate any pump case in a single afternoon and enhance it by the next week. It can produce a new case or impeller casting in 5 or 6 weeks. The improvement of patternless molds — 3D printed sand molds — was the sport changer for Conhagen, yielding excessive fidelity, cheap cost and fast delivery in most any steel.
Conhagen has advanced 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 reduce the total cost of possession. Two examples of case replacements are included in this editorial — a four stage, axial split, 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 gap between bearings from 37 3/4 inches to 30 5/8 inches.
Conhagen has been in enterprise for eighty years. Its products embrace detailed engineering calculations, manufacturing drawings, set up, operation and maintenance manuals, a one-year operation guarantee and support for management of change reports. It is sufficiently big to be accountable, but small enough to be responsive.
Share