• 1/2 lobe
• Double Stage
• Flow rate: 100%
• Differential pressure: 12 bar (170 psi)

• very smooth conveyance
• compact dimensions despite hign number of stages
• large cross sections of rotor inlet
• low flow velocity/NPSH
• conveyance of compacted products possible

• 1/2 lobe
• Single Stage
• Flow Rate: 200%
• Differential pressure: 6 bar (85 psi)

• greater volumetrick efficiency/long service life due to long seal lines between rotor and stator
• compact dimensions together with high flow rates

The single helical screw/rotor has a singular cross section, an extremely long pitch and large thread dept which oscillates when the rotor is turns within the fixed stator. The cross section of the stator is the same profile as that of the rotor, however, the stator is a 180^o internal twin start thread. As a result of the 1/2 ratio lobe geometry cavities are formed between the rotor and stator when the two are put together. By the turning movement of the rotor the progressing cavities between rotor and stator transport the fluid in a smooth and continuous manner from the suction to the discharge side of the stator. The flow rate is determined by the pitch of the rotor/stator, diameter and eccentricity as well as the speed of the pump.

The pressure capability depends on the number of stages and the differential pressure per stage up to 6 bar (85 psi).

The 2-stage NEMO® Pump in S-Geometry can reach a differential pressure up to 12 bar (170 psi) with a flow rate of 100%.

A single-stage NEMO® Pump in L-Geometry, has the same outer dimensions as the 2-stage pump in S-Geometry, the same diameter and eccentricity but a pitch double that of the S-Geometry rotor/stator. Therefore, the pump produces a flow rate of 200% when compared to the S-Geometry at a differential pressure of up to 6 bar (85 psi).

• 2/3 lobe
• Double Stage
• Flow rate: 150%
• Differential pressure: 12 bar (170 psi)

• extremely compact dimensions despite high pressures and flow rates capabilities
• almost pulsation free conveyance
• high dosing accuracy

• 2/3 lobe
• Single Stage
• Flow rate: 300%
• Differential pressure: 6 bar (85 psi)

• compact dimensions in conjunction with very high flow rates
• almost pulsation free conveyance
• high dosing accuracy
• good volumetric efficiency/long service life due to long seal line between rotor and stator

The twin start helical rotor has an elliptical cross section, a long pitch and large thread dept. it rotates within a circular eccentric motion within the fixed stator, the form of which is the same geometry as the rotor, however, the stator is triple start internal thread with 120^o interval starts. As a result of the 2/3 ratio lobe geometry cavities are formed between the rotor and stator when the two are put together.

By the turning movement of the rotor, the progressing cavities between the rotor and stator transport the fluid in a smooth and continuous manner from the stator. the flow rate is determined by the pitch of the rotor/stator, elliptic diameter and eccentricity as well as the speed of the pump. The pressure capability depends on the number of stages with the differential pressure being up to 6 bar (85 psi) per stage.

In D/P-Geometry the cavities are approximately 75% of the size of the S/L-Geometry however they open twice per revolution compared to once per revolution in 1/2 stage geometries. Therefore D/P-Geometry rotor/stator have a 50% increase in the flow per revolution compared to S/L-Geometry

The 2-stage NEMP® Pump in D-Geometry can reach differential pressures of up to 12 bar (170 psi) at a flow rate of 150% over that of the S-Geometry.

A single-stage NEMO® Pump in P-Geometry, has the same outer dimensions as the 2-stage pump in D-Geometry, the same ellipse and eccentricity but a pitch double that of the D-Geometry rotor/stator. Therefore the pump produces a flow rate of 300% over that of the S-Geometry at a differential pressure of up to 6 bar (85 psi).