Computer Numerical Control Machine (CNC) at Nickerson
Impeller wear ring
Schlumberger Pump Assembly
80 Series® Engine Driven
“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Model 342A Single Stage End Suction
Submersible Turbine Pumps
Well Pump Installation
Machinist at Nickerson Company running a state-of-the-art CNC machine.
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.
3800 Series, Single Stage End Suction
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Bowl wear ring
Model 411 Horizontal Split Case
Horizontal Lathe
National Pump Vertical Turbine Pumps, API 610
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.
Impeller wear ring
Vertical Lathe
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Vertical Turbine Pumps, Deep Well
Figure 1. The general arrangement of a three phase waveform.
