Gorman-Rupp SF Series® Submersible Solids-handling Pump
Horizontal Lathe
Super T Series® Engine Driven
Frame-mount Centrifugal Pumps
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Model 342A Single Stage End Suction
Computer Numerical Control Machine (CNC) at Nickerson
Vertical Turbine Pumps, Deep Well
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
3800 Series, Single Stage End Suction
Schlumberger Pump Assembly
SF Series®
Nickerson Field Crew
Vertical Lathe
Utah Lake Cascade Pump
Horizontal Lathe
Ultra V Series® and UltraMate®
Computer Numerical Control Machine (CNC) at Nickerson
Impeller wear ring
Close-Coupled Vertical Turbine
Impeller wear ring
Model 411 Horizontal Split Case
Figure 3. Three phase power has three identical sine waves overlapping at an offset of 2π/3 radians or 120°. When one phase reaches an x-intercept or node the next phase is only 30° and approximately 5.6 milliseconds from reaching its crest.
Submersible Turbine Pumps
National Pump Vertical Turbine Pumps, API 610
Horizontal Lathe
Figure 2. A simple sine wave with a period of 360° and an amplitude of 1. In single phase power the x-intercepts are 180° from each other. A full period is 360°. A single phase motor has a crest approximately every 16.5 milliseconds giving the motors a tendency to vibrate more, which may contribute to a shortened bearing life.
Figure 1. The general arrangement of a three phase waveform.
