CENTRIFUGAL PUMP Process (API 610) Cryogenic (API 610 / Manufacturer Std.) Special (API 610 High Speed, Slurry) Sealless (API 685) Submersible (API 610 / Manufacturer Std.) POSITIVE DISPLACEMENT Metering (Dosing) - Diaphragm/Plunger (API 675) Reciprocating – Piston/Plunger (API 674) Rotary - Gear, Screw, Vane, Sealless, Cavity, Lobe (API 676)