 Operating principle Eccentric screw pumps
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| OPERATING PRINCIPLE |  | | The "eccentric screw pump" is a member of the "positive displacement" pumps group. The 2 principal parts are the "rotor" (round thread screw) which turns eccentrically inside a fixed rubber part, the "stator". Cavities are created between the rotor and the stator which more progressively forward in a rotating movement free of pulsation | |
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| "Theoretical capacity" is in relation to the pump speed and to rotor dimension. Theoretical capacity is as below: |
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Qth = 4e x d x S x V
- e = rotor eccentricity
- d = rotor diameter
- S = stator pitch / twice rotor pitch
- V = rotor speed
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| Pump "pressure" depends on the number on the number of rotor/stator stages. |
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1 stages: up 6-7 bar
- 2 stages: up to 12-14 bar
- 4 stages: up to 24-28 bar
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