Case Study: How DVA Can Have a
Positive Impact
Troubleshooting
A customer had an application where an
electric motor was running a centrifugal pump.
The customer was using a urethane element
coupling which was not suited for the
application and was therefore causing excessive
vibration. This resulting vibration, which was
entirely coupling related, was harmful to the
pump and the proper coupling needed to be
installed to avoid costly damage to the pump and
ultimately having it fail catastrophically. The
customer contacted the Bearing & Transmission
coupling specialist who was given 48 hours to
try and resolve the problem before the pump had
to be shut down, resulting in enormous down time
costs.
Our coupling specialist visited
the site, recognized that the existing coupling
was not suitable for this high horsepower, high
speed pump and immediately recommended a disc
pack coupling, based on his field application
experience. The suggested coupling was better
suited for this high vibration application.
Lead time for a typical and suitable
replacement was 2-4 weeks, due to a non-standard
distance between shafts. This long lead time
would result in excessive down time and lost
production income for the customer. However,
through the use of Bearing & Transmission’s
emergency disc coupling breakdown service, our
coupling specialist was able to have the spacer
assembly built and delivered in less than 24
hours. This solution kept the customer’s
operation running, with vibration reduced to
acceptable levels, and prevented severe damage
and eventual replacement of a very expensive
pump.
Suitable
replacement cost: $2500 with 2-4 week delivery
Built
spacer cost: $3000 with 24 hours delivery
The DVA realized by the customer in this
situation was equal to the amount of down time
dollars saved through the use of our disc
coupling breakdown service less the increased
cost of the custom built spacer.
For
more information on Bearing & Transmission’s
technical coupling capabilities or on our disc
coupling breakdown service, please visit the
Bearing and Transmissions
Coupling Specialists
section.
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