“NSF/ANSI 61.” NSF RSS. The Public Health and Safety Organization, n.d. Web. 07 June 2017.
CNC machine, where computers are used to control the movement and operation of the mills, lathes, and other cutting tools.
Bowl wear ring
Gorman-Rupp SF Series® Submersible Solids-handling Pump
Computer Numerical Control Machine (CNC) at Nickerson
National Pump Vertical Turbine Pumps, API 610
Vertical Lathe
Well Pump Installation
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.
Custom shapes cut from raw materials.
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.
Close-Coupled Vertical Turbine
Schlumberger Pump Assembly
Parley’s Water Treatment Plant. Photo credit SLCdocs.com
Impeller wear ring
Machinist at Nickerson Company running a state-of-the-art CNC machine.
