The Magazzine Forr Pump Usserrss Worrlld wiide Septtember 2007
pump-zone.com
Photo courtesy of Fixturlaser AB, Mölndal, Sweden.
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PUMP MAINTENANCE & RELIABILITY
34 Digging to the Root
of the Problem
Jason W. Bitting and Hardin T. Wells,
Albemarle Corporation
Using root cause failure analysis to address equipment design
and manufacturing deficiencies that increase pump reliability.
46 Reliability Improvements to
a High Speed/High Energy Pump
Ed Wilcox, Chevron Energy Technology Company
An analysis of solutions to improve reliability that include
changing to titanium on the impeller and inducer, and
modifying the gearbox seal, the secondary sealing system, and
the tilting pad bearing design on the output shaft.
52 Pumping With Encoder Feedback:
A Reliability-Centered Decision
Allen Chasey, Dynapar
All VFD systems use some form of closed-loop feedback to
avoid surging, excessive noise, and in extreme cases, vibration.
A reliable encoder signal can minimizes speed variance and
helps eliminate these unwanted effects. Here’s how it works.
IMPROVING MOTOR LIFE CYCLE COSTS
57 Efficiency and Your Bottom Line:
Getting to the Meaning Behind
the Nameplate
John Engman, Emerson Motor Company
Because operational costs ride on efficiency determinations,
accurate measurements of losses occurring within the motor
are paramount. Knowing the meaning behind the efficiency
rating can make or break a smart purchasing decision.
60 Preventing Drive Induced Electrical Damage
to AC Motor Bearings
Adam Willwerth, Electro Static Technology
Currents are induced on the motor shafts when AC motors
are employed with VFDs to drive air pumps, chillwater
pumps and compressors in HVAC/R systems. Without a
grounding device, these currents typically discharge through
the motor bearings, causing frosting, pitting, fusion craters,
and fluting.
36TH TURBOMACHINERY SYMPOSIUM
76 The only rotating equipment and power generation event organized by users for users.
You don’t want to miss these products being exhib-
ited that relate to the maintenance, performance, troubleshoot-
ing, operation, and purchase of rotating equipment.
COMPARING PD PUMP DESIGNS
FOR TRANSFERRING DEWATERED
SLUDGE CAKE
84 Michael L. Dillon, seepex, Inc.
An analysis of various positive displacement pump design
limitations to better specify which design best meets user
expectations of performance, maintenance, installations costs,
operating costs and biosolids characteristics.
A LASER GUIDED OIL SETTING TOOL
90 Lew Beck, Duke Energy Rotating Equipment
Group, Oconee Nuclear Station
In the past, the nuclear power industry has
experienced equipment failures due to improperly set oilers.
There was never a tool available that ensured the level was being
