Twin Screw Pumps

VLT 2800

The working principle of Roto Twin Screw Pumps is dependent on the rotation of two screw spindles in closed compartment. A pre-defined clearance is maintained between the screw spindles and between screws and the bore of the casing. When the timed screws in twin screw pumps start rotating, the liquid is drawn towards the end of the screw spindles and entrapped between the bore of the pumping compartment as well as the flanks of the screws and is then propelled axially from both the ends towards the centre.

Distinctive Design Features and Benefits

Long and trouble-free service life


Due to absence of metal to metal contact between the pumping elements. Can even run dry for limited period of time

No axial thrust


Dual flow of liquid in opposite direction balances axial thrust

Higher volumetric efficiency


Due to special double profile of screw flanks

High cavitation free suction lift


Due to low NPSH (R)

Self-priming and capable of handling entrapped air/vapour/gas


Due to positive displacement action and being inherently self-priming

Uniform metered flow


Being a positive displacement pump, head developed is independent of speed and capacity is approximately proportional to speed in twin screw pumps

Capable of handling wide variety of Fluids


Lubricating/non-lubricating as well as aggressive liquids can be handled due to choice of different designs and material of construction

Safe to operate


Twin screw pumps have in-built relief valve designed to bypass upto 100% capacity