NOTOS 2NS Two Screw Pump

NOTOS® 2NS Two Screw Pumps

Long service life when conveying non-abrasive to slightly abrasive media

Due to their characteristics, the self-priming NOTOS® 2NS two screw pumps have a long service life and are preferably used in the oil & gas mid-/downstream, marine, power generation, process industry as well as in tank farms.

They convince through continuous conveying with low pulsation, which ensures gentle product handling. NOTOS® two screw pumps have one drive screw, transferring torque through a hydrodynamic film to the rotating intermeshing driven screw. Two spindle pumps are particularly suitable for non-abrasive to slightly abrasive, corrosive as well as non-corrosive and low to highly lubricating liquids. They have also proven themselves for low to high flow rates as well as pressures. To achieve maximum efficiency, the pump has been optimised using the High Efficiency Unique Design (HEUD) concept. This is characterised by extremely precise tolerances due to state-of-the-art technology as well as the optimised spindle profile. The wide range of materials, from grey cast iron and chrome-nickel steel to duplex, superduplex or hastelloy steel, ensures optimum pumping conditions in a wide variety of applications. Optionally, the pumps can be upgraded according to the standards of the American Petroleum Institute (API). These special requirements are mainly relevant in the oil & gas and petrochemical industries.

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NOTOS 2NS Two 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
he housing with replaceable lining offers an optional heating jacket. This allows the temperature of the medium to be maintained at a certain level. Various connection configurations are also available, such as 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 2NS. Magnetic drive optional.


Pressure max.


Capacity max. 


Operating rotational speed


2NS-/16-2 16 10 3.600
2NS-/16-3 16 20 3.600
2NS-/16-4 16 40 3.600
2NS-/16-5 16 50 3.600
2NS-/16-6 16 80 3.600
2NS-/16-7 16 100 3.600
2NS-/16-8 16 120 3.600
2NS-/16-10 16 180 3.600
2NS-/16-11 16 220 3.600
2NS-/16-12 16 300 3.600
2NS-/16-13 16 380 3.600
2NS-/16-14 16 500 3.600
2NS-/16-15 16 650 3.600

*Further sizes and technical data on request.

  • High efficiency
  • Hydraulically balanced
  • Quiet operation
  • Long service life
  • Low pulsation
  • Excellent suction capability
  • Wide range of applications
  • Wide range of materials
  • Optionally according to API 676 (American Petroleum Institute) requirements

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