Centrifugal Pump Fundamentals

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• Submersible Pumps vs. Self-Priming Centrifugal Pumps
  characteristics. Therefore submersible pumps also. need NPSHA, but it is not as critical as. it is for above-ground centrifugals. ./89401f37-a83e-4dce-86a8-3e2f7c77a57f Sewer Bypass Fundamentals. Submersible Pumps vs. Self-Priming Centrifugal Pumps. By: Jose Somera. Typically bypass pumping will occur...
• Upping the efficiency of pumps and fans
  by the cube of motor speed, also called centrifugal load. For example, if the fan motor speed can be cut in half, energy consumption = ( 1 /2) 3 = 1 /8, meaning the energy used to power the motor actually decreases by 7 /8. The same rule applies to pumps. To illustrate, let's compare outlet dampers...
• Vane Pump Technology and Its S&D Manufacturing Applications
  are only part of a much bigger pic- slots in the pump rotor. When the pump. ture. driver turns the rotor, centrifugal force,. manufacturing. For even greater flexibility, efficien-. rods, and/or pressurized fluid causes the. Sliding vane pumps are used in a wide. cy, and productivity, advanced vane pump...
• AC Induction Motor Fundamentals
  an additional stator winding (start/. · Three-phase induction motor. auxiliary winding) as shown in Figure 3. The start wind-. ing can have a series capacitor and/or a centrifugal. Single-Phase Induction Motor. switch. When the supply voltage is applied, current in. the main winding lags the supply voltage due...
• Vane Pump Technology Ideal for Biodiesel Manufacturing Processes (.pdf)
  offered high efficiency. degrade faster than petrodiesel if oxidizing metals such as. and low maintenance advantages over traditional gear and. copper, bronze, brass or zinc are present.). centrifugal pumps. These are important factors in today's era. of rising energy costs, lean personnel staffs...
• Engineering R&D: The upside of cavitation
  customized for food applications. More than a year's worth of research and development efforts made at the SPX innovation center in Silkeborg, Denmark, preceded last fall's launch. The core technology was coupled with SPX's line of APV brand centrifugal pumps. In August of last year, Tony Mathis...
• Sliding Vane Technology Offers Critical Advantages for Biodiesel Manufacturing Processes (.pdf)
  - and medium-viscosity. advantages over traditional gear. The secret behind a. constant volume of fluid;. process applications. If need. and centrifugal pumps. These. sliding vane pump's enviable. variances in pressure have. be, sliding vane pumps can. are important factors in today's. operational...
• Advanced Spectral Analysis (.pdf)
  Belt Alignment. Figure 7: Current Demodulation Spectrum After Belt Alignment. Fans/Centrifugal Pumps. Fan blades and centrifugal pump vane frequencies can be monitored in a demodulated current spectrum at a. frequency that is equal to the number of blades (or vanes) times the FP. Increasing amplitude...
• Fault Zone Analysis - Identifying Motor Defects Using the Rotor Fault Zone
  pulley. possible problems developing in the belt drive of this. L is the length of the belt. system. RPM is the motor speed. Figure 5. Demodulated Current Spectrum Prior Belt Alignment. Figure 6. Current Demodulation Spectrum After Belt Alignment. 4. Fans/Centrifugal Pumps. amplitude of the peak...
• Cowern Papers: Motor Basics
  in loads having characteristics requiring low torque at low. speeds and increasing values of torque as the speed is increased. Typical examples of. variable torque loads are centrifugal fans and centrifugal pumps. PHASE. Phase is the indication of the type of power supply for which the motor is designed...

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