June 2019
The Shift to Variable Speed Fluid Couplings
Power plants with boiler feed pumps are finding more efficiency.
Smaller Motors Grow in Popularity in HVAC Design
Engineers are eschewing large motors for less centralized systems.
A Review of Variable Speed Drive Technology: Part 2
How electronic speed control drives, adjustable frequency drives, magnetic drives and steam turbine drives work to achieve true variable speed control.
General Scope Document: Project Deliverables
Addressing the sixth component of a general scope document





New Considerations for Variable Speed Compressors 
VFDs can extend life by reducing wear on equipment and motors.
Prevent Downtime with Pump Diagnostic Equipment 
Predictive maintenance can provide detailed data and actionable repair instructions.
Vibration Analysis Using Human & Artificial Intelligence
A hybrid approach can provide specialized evaluation for midtier plants and/or midcritical equipment.
Best Practices for Mitigating Bearing Currents
Consider these methods to help protect systems from high-frequency current damage.





Comply with Critical Lead-Free Water System Regulations 
Understand calculations and specifications.
Motor Starting Basics
Understand these concepts before starting squirrel cage induction motors.
The Need for Shaft Grounding on VFD-Driven Motors
Harmful common mode shaft voltages can damage motor bearings and cause premature machine failure.
Understand Motor & VFD Independence
Separation can improve delivery time and allow exact replacement.
Use Your Senses for Healthy Systems
Rely on touch, sound and sight—and tools that enhance these senses—for equipment longevity.
Understanding Oil Viscosity & Bearing Lubrication
Hydraulic Institute answers questions on rolling element bearings and grease as a lubricant.
Sealing High-Speed Shafts in Turbomachinery 
Understand implications involved with using gas film seals in this application.
Should You Upgrade a Pump Drive?
Is adding some kind of variable speed control worthwhile?
Use Ultrasound to Optimize Grease Replenishment
Condition monitoring helps manage over-lubrication.
4 Industry Demands Driving Electronically Commutated Motors
Furnace blower motor design transformation was fueled by new end user and government standards.
Wear Ring Clearance for Centrifugal Pumps 
 Understand the pump specific speed to help establish proper tolerance.
Basics of System Alignment vs. Balancing 
Differentiating between misalignment and imbalance is essential to identifying the cause of pump failure.
Golf Course, Shopping Mall See Benefits of Pump Control
This technology can help reduce blockages, detect damaged equipment and avoid dry runs, thus reducing motor stress.
Solutions for Unexplained Pump Failure 
Jim Elsey on the mysteries of the twilight zone
Replacing Large Motors Successfully
Understand accessories, sizing, electrical performance and color.
Wall Street Pump & Valve Industry Watch, June 2019
Pump Market Analysis