“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
Impeller wear ring
Figure 1. The general arrangement of a three phase waveform.
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Utah Lake Cascade Pump
Nickerson Field Crew
Utah Lake Cascade Pump
Machinist at Nickerson Company running a state-of-the-art CNC machine.
Close-Coupled Vertical Turbine
3800 Series, Single Stage End Suction
Schlumberger Pump Assembly
National Pump Vertical Turbine Pumps, API 610
Ultra V Series® and UltraMate®
Model 411 Horizontal Split Case
Vertical Turbine Pumps, Deep Well
Custom fabrication to a large part
Bowl wear ring
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.
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Horizontal Lathe
80 Series® Engine Driven
Submersible Turbine Pumps
Computer Numerical Control Machine (CNC) at Nickerson
380 Series Vertical Inline Pump with VFD
Computer Numerical Control Machine (CNC) at Nickerson
Model 342A Single Stage End Suction
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.
Gorman-Rupp SF Series® Submersible Solids-handling Pump
