Single Screw Pumps are a type of Positive Displacement Pumps. These pumps work on the principle of the rotary movement of single helix metallic rotor inside double helix elastomer stator. When the rotor start to move inside the stator, the cavities are formed resulting in positive displacement of liquid through cavities. The liquid is then released from the discharge side of the pump.
Single Screw Pumps are best suitable for applications needing a non-pulsating and uniform flow. These pumps ensure a high suction-lift and can transfer tough to handle fluids having solids, highly viscous, abrasive elements etc. These pumps are actively used to handle sewage, bilge, sludge and even food items like jam, starch and butter. These pumps are used in processing and manufacturing plants of various industries such as marine, chemical, cosmetics, paint, waste water, oil & gas and many more. Single screw pump are non-clogging and can be operate in reverse condition as well. These pumps are also extremely easy to maintain.
Progressive Cavity Pumping Principle
The pumping element comprises of a precision machined single external helix metallic rotor, and a double internal helix elastomer stator. Due to the special profile of the rotor and stator set, a sealing line is formed along the axis of the rotor which is maintained at both static and dynamic conditions. As the rotor turns within the stator, these cavities progress from the suction to the discharge end of the pump carrying the fluid.
Because of single rotating element, progressive cavities are generated which deliver a uniform, metered and non-pulsating flow. The developed head is independent of the rotational speed, where as the capacity is proportionate to the speed.
Inherently self-priming, the pumps can work on snore and do not require a foot valve.
Can handle solid in suspension or media containing a high percentage of solids.
Low NPSH Requirement
Suction lift capabilities of up to 9.5mWc and effective in high vacuum conditions.
Low Internal Velocity
Minimum degradation of shear-sensitive media, and can also handle highly viscous materials having pseudo-plastic characteristics.
Due to the reversible rotation capabilities, Progressive Cavity Pumps can perform with equal efficiency in either direction.
Rotors turn inside a resilient stator and thus generate little noise.
Separate Bearing Housing
Fluids can be pumped without no contamination.