NOTOS 3NS Three Screw Pump

3 NS – Pompa a tripla vite

La pompa a tripla vite NOTOS® ha una vite d'azionamento che, collegata a due viti rotanti, trasferisce tramite un velo idrodinamico la coppia alle viti stesse.

Suitable for use in a wide range of industrial sectors and applications, the self-priming NOTOS® 3NS three screw pumps are true lightweights and have a small footprint.

Due to the optimisation by means of the High Efficiency Unique Design (HEUD) concept, three screw pumps convince with a high efficiency. In addition, continuous delivery with low pulsation and a flow of the medium with minimal turbulence is ensured. This results in gentle product handling. It is assured by means of state-of-the-art technology, precise tolerances and an optimised screw profile. In addition to a drive screw that transmits torque via a thin hydrodynamic film, 3NS three screw pumps have two rotating, intermeshing driven screws. This makes them particularly suitable for non-abrasive and non-corrosive media as well as for liquids with low to medium viscosity, such as lubricants. Through an optional upgrade, NOTOS® multi screw pumps meet the American Petroleum Institute (API) standards relevant to the oil & gas and petrochemical industries. Furthermore, thanks to the wide range of materials, they are versatile and can be used in a wide variety of applications. In addition to grey cast iron and chrome-nickel steel, they are also available in duplex, superduplex or hastelloy steel. This ensures low maintenance and thus low life cycle costs.

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NOTOS 3NS Three Screw Pump

1 Screws
Nitrated in alloy steel or in stainless steel. The HEUD (High Efficiency Unique Desgin) provides excellent performance.

2 Housing with optional heating jacket
Thanks to the optional heating jacket, the conveyed medium can be kept at a certain level. In addition, the liner is replaceable and available with various connection configurations, for example top top, side top or in line.

3 Bearing Bushes
Internal bearing bushes helps to support radial loads.

4 Mechanical Seal
Under suction pressure just one mechanical seal is required for the 3NS. Magnetic drive optional.


Pressure max.


Capacity max. 


Operating rotational speed


3NS-/25M2 25 4 3.600
3NS-/25M3 25 7 3.600
3NS-/25M4 25 13 3.600
3NS-/25-4 25 15 3.600
3NS-/25-5 25 20 3.600
3NS-/25-6 25 30 3.600
3NS-/25-7 25 40 3.600
3NS-/25-8 25 50 3.600
3NS-/25-9 25 60 3.600
3NS-/25-10 25 80 3.600
3NS-/25-11 25 100 3.600
3NS-/25-12 25 140 3.600
3NS-/25-13 25 200 3.600
3NS-/25-14 25 270 3.600
3NS-/25-15 25 400 3.600
3NS-/80-4 80 15 3.600
3NS-/80-5 80 20 3.600
3NS-/80-6 80 30 3.600
3NS-/80-7 80 40 3.600
3NS-/80-8 80 50 3.600
3NS-/80-9 80 60 3.600
3NS-/80-10 80 80 3.600
3NS-/80-11 80 100 3.600
3NS-/80-12 80 140 3.600
3NS-/80-13 80 200 3.600
3NS-/120-7 120 40 3.600
3NS-/120-8 120 50 3.600
3NS-/120-9 120 60 3.600

*Further sizes and technical data on request.

  • High efficiency
  • Easy maintenance
  • Lightweight and small footprint
  • Extremely low noise and vibration
  • Low life cycle costs
  • Wide range of applications
  • Wide range of materials
  • Optionally according to API 676 (American Petroleum Institute) requirements

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