Roto pumps ltd. Offers twin screw pumps. 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 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.
Features and benefits of twin screw pumping principle are:
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
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
Has in-built relief valve designed to bypass upto 100% capacity
These pumps find application in the various industries:
Oil & gas
Sugar
Power plant
Man made
Fiber
Marine
Paper
Steel
Fertilizers
Distillation plant
Edible oil
