Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

Back Pull-Out Pumps

Maintenance & Reliability
Heinz Bloch

Back Pull-Out Pumps

Many process pumps are designed and constructed to facilitate field repair.  On the so-called back pull-out pumps (see illustration, also Ref. 1), shop maintenance can be performed while the casing and its associated suction and discharge piping are left undisturbed.

The impeller, pump shaft and bearings remain with the power end which is simply lifted up and removed for refurbishment, if needed. A spacer coupling is used; disc-pack couplings are much preferred over certain cheap and therefore popular elastomer-in-torsion couplings.

Although costing more initially, well-designed disc-pack couplings save money in the long run. In to get a long run, failure avoidance and safety are the ever-present key goals of reliability-focused users (Ref. 2).

Because this is the fundamental definition of reliability, it, like truth, will never change. Reliability will touch on a number of issues with process pumps; these issues and their solutions will be explained in many future postings. In particular, Ref. 3 will both highlight and summarize much of this in a 724-page book.

References

  1. Bloch, Heinz P. and Allan Budris; “Pump User’s Handbook: Life Extension,” 4th Edition, (2014), Fairmont Publishing, Lilburn, GA, ISBN 0-88173-720-8
  2. Bloch, Heinz P.; “Pump Wisdom: Problem Solving for Operators and Specialists”; (2011), Wiley & Sons, Hoboken, NJ; ISBN 9-781118-04123-9
  3. Bloch, Heinz P.; “Petrochemical Machinery Insights,” (2016) Elsevier Publishing, Oxford, UK, and Cambridge, MA, ISBN 978-0-12-809272-9

Related Articles

Sulzer Cost effective sustainable fuel production

Cost effective sustainable fuel production

Benchmarking Market Report highlights cost-leadership of Sulzer Chemtech BioFlux Process Technology for Renewable Fuels production BioFlux® process technology for renewable fuel…

Related Whitepapers

Expansion Joint Expertise Improves Industrial Wastewater System Reliability

The majority of industries have wastewater treatment plants. Government agencies and local governments require these facilities to meet pretreatment requirements. Pretreatment rules were enacted to prevent…

How to Decrease Oil Changes with Bearing Isolators [Inforgraphic]

Learning how to decrease oil changes can be time- and money-saving. Oil life can be long if contamination is eliminated, which is easier said than…

Synchronous Machines Are The Optimal Choice For Heavy Industry

TECO-Westinghouse experience assures superior performance and reliability For over a century, Westinghouse has been the pacesetter in the design and production of electric machines for heavy…

Why FLEXXORs Are Designed Differently

J. Hilbert Anderson, President of Coupling Corporation of America, discusses some of the reasons why FLEXXORs are designed differently from all other flexible couplings, and…

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Join the #PumpTalk Community


By submitting this form, you are consenting to receive marketing emails from: Empowering Pumps & Equipment, 2205-C 7th Street, Tuscaloosa, AL, 35401, http://www.empoweringpumps.com. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact