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  • AODD Pumps
    • The Metal Pumps
      • nf 25
      • nf 50
      • nf 75
    • The Plastic Pumps
      • nfp 25
    • The Sanitary Pumps
      • sf 25
      • sf 50
      • sf 75
    • Spares & Replacements
  • Mag Drive Pumps
    • The Metal Pumps
      • NMM2H
      • NMM3H
    • The Plastic Pumps
      • NMP2H
      • NMP3H
  • Air Amplification Nozzles & Conveyors
    • N25
    • N50
  • Accessories
• Technical Information
  • About AODD Pumps
    • Why AODD Pumps?
    • AODDP Principle of Operations
    • Air Distribution System
    • The Neoflux Advantage
    • Diaphragm Guide
    • AODDP Selection Guide
    • AODDP Installation Chart
    • AODDP Sound Level Chart
    • Viscosity Chart
  • About Mag Drive Pumps
    • Why Mag Drive Pumps?
    • Mag Drive Pump Principle of Operations
    • The Neo-Mag Advantage
  • About Air Amplification Nozzles
    • Why Air Amplification Nozzles?
    • Air Amplification Nozzle Principle of Operations
    • The Neo-Vac Advantage
  • When to use Positive Displacement Pump?
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Positive displacement (PD) pumps are divided into two broad classifications:

• Reciprocating Principle

• Rotary Principle

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