Tapflo
BROCHURES & MANUALS
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Sanitary Screw Pump

Our Screw Pump (available as a Double Screw) is Self Priming and has been produced specifically for hygienic and sanitary applications within the food, chemical and pharmaceutical industries. The Screw Pump is entirely machined from cast Stainless Steel AISI 316L with a surface roughness of ❬0.8 as standard (❬0.5 on request) to provide increased corrosion resistance. Competitors units employ a cast iron gear box with epoxy paint which can become eroded over time and need replacing/repairing. The pump shafts are constructed from Duplex Stainless Steel 1.4462 to provide extra rigidity in operation and the pump can be fitted with a number of different sealing options and elastomer materials to suit almost any application. The Double Screw Pump design is a combination of all the best advantages of Lobe, Peristaltic, Centrifugal & Circumferential Piston Pumps. The result is an incredibly versatile and robust pump which can be used for a plethora or even a combination of applications within enumerative industries. Below is a table demonstrating this:

Capacity range

Pump type Pomac PDSP Twin Lobe Circumferential Piston Tri Lobe Progressive Cavity
Hygienic +++ + +- +- -
Suction capability +++ ++ ++ + +++
Pressure +++ +++ +++ + +++
Dry running ++ + + - -
Gentle handling soft solids ++ +- +- ++ ++
Maintenance +++ +- +- - -
Share rate ++ + - + ++
CIP Capability +++ +- +- - -