Why use an OEM for centrifugal pump repairs?

Centrifugal pump OEMs claim they provide better components, service, response and value than aftermarket service companies, but that isn’t always the case.
Until the early 1990s, OEM restore centers worked solely on their merchandise, espousing the mantra, “We know our merchandise best.” During the ‘90s, a lower in new product gross sales triggered OEMs to change their story and boast that their outlets could work on any model of centrifugal pump. Suddenly, their specific product information utilized to all centrifugal pumps.
According to the online magazine, World Pumps, six of the main U.S. centrifugal pump manufacturers of the Eighties have been consolidated into one, Flowserve. Many U.S. legacy brands are still manufactured by Flowserve. During the numerous mergers and acquisitions, the U.S. Department of Justice pressured the sale of some brands to different manufacturers. Products had been disassociated from their designers.
Before the good consolidation, each OEM had a chief engineer and several product designers who employed a holistic design process, which considered the entire product, the interaction of its numerous elements, the user’s software and industry specs. When a consumer had a significant drawback, the chief engineer was called to sort it out. The lessons learned have been included into future designs and centrifugal pumps developed over many years.
Industry requirements, API 610 specifically, were developed by customers to simplify procurement of quality gear and to improve pump reliability. It is a compendium of users’ experiences, which are usually expensive experiences. API 610 captures solutions to common centrifugal pump design points and best-in-class design options.
Computers loaded with amazing software have democratized engineering. When I was a design engineering manager 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. Skyrocket , that talent and tons of skill sets are on my desktop. Integral calculus is finished with a click in MathCAD. Finite factor evaluation of buildings, strain vessels and even shaft keyways are built-in into our strong modelers. Hydraulic element design software program feeds computational fluid dynamics analysis packages, decreasing hydraulic design danger. Rotordynamic analysis software coupled with structural analysis instruments solves — and hopefully prevents — vibration issues.
3D optical scanners and laser trackers provide 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 or 6 weeks. The growth of patternless molds — 3D printed sand molds — was the game changer for Conhagen, yielding excessive fidelity, affordable cost and fast supply in most any steel.
Conhagen has evolved from a repair shop to a producer that designs new centrifugal pumps or modifies present pumps for specific purposes. Unique designs present the necessary hydraulic efficiency and mechanical robustness to reduce the total value of possession. Two examples of case replacements are included on this editorial — a 4 stage, axial cut up, boiler feed pump’s carbon metal case was replaced with a CA6NM casting. The second instance is a single stage between a bearings pump that suffered rotor dynamics issues. Conhagen designed and manufactured a 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, installation, operation and upkeep manuals, a one-year operation warranty and assist for administration of change stories. It is sufficiently big to be responsible, yet sufficiently small to be responsive.
Share

Leave a Comment