Twin Screw Pumps


Roto Gear Timed Dual-Flow Twin Screw Pumps is dependent on the rotation of two screw spindles in closed compartment. Wherein, a predefined clearance is maintained between the screw spindles as well as between the outside diameter of the screw spindles and the bore of the casing/liner in which the screw spindles are located. Each half of the screw spindles is left-handed and right-handed. The dual flow nullifies the axial thrust completely thereby enabling the screw spindles to remain in a state of hydraulic balance. Roto’s unique double profile of the screw spindles contributes to a higher volumetric efficiency, thus an improved overall efficiency. These pumps widely confirm to API 676, 3rd edition and are ATEX and CE certified.

Water supply systems

Cooling circuits

Swimming pools

Fire-fighting systems

Flow Rate

Up to 940 m3/h


Up to 100,000 cST


Up to 40 Bar


Up to 350C

Horizontal External Bearing

Horizontal Internal Bearing

Vertical Twin Screw Pump

Long and Trouble-Free Service Life

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

No Axial Thrust

Dual flow of liquid in opposite direction balances the axial thrust.

Higher Volumetric Efficiency

Due to special double profile of screw flanks high cavitation free suction lift.

Due to Low NPSH Requirements.

Self-priming and capable of handling entrapped air Due to positive displacement action.

Uniform Metered Flow

Being a positive displacement pump, head developed is independent of speed & the capacity is approximately proportional to speed.

Capable of Handling Wide Variety of Fluids

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

Safe to Operate

Built-in relief valve designed to bypass excessive pressure developed in the discharge.

Self Priming & Capable of Handling Entrapped Air/Vapour/Gas

Due to positive displacement action and being inherently self priming.

Housing Components : Cast Iron, Cast Steel & Stainless Steel

Liner : Cast Iron & Stainless Steel

Screws : Alloy Steel, Nitrided Steel & Stainless Steel

Sealing Type : Mechanical Seal, Gland Packing