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  • Mechanical
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  • Category Tags
Product Type
Pumps > Two-screw
Related Industries
General Industry
Pressure Differential
Maximum: 120bar-d
Fluid Temperature Range
Maximum: 350°C
Flow Capacity
Construction Features
Categegory Tags
Design Types
base plate

Product Description

Twin-Screw pump up to 50 bar

Product Features

Twin Screw Technology
A pair of specially profiled screws, machined integral from solid stock and well supported on antifriction bearings run in precision bored interchangeable casing liners. Each screw set has one RH and one LH screw engaging with a similar but opposite hand screw pair.

A pair of hardened and profile ground timing gears synchronize the screws to maintain a small but positive clearance between the flanks thus ensuring no metal to metal contact. The pumps can, therefore, run dry for sometime without any damage. This unique feature enables to run the pump even dry and handle fluids that do not have enough lubricating value and also very low or high viscous products. Consequently, since there is no metal to metal contact; wear and tear is reduced to the minimum, ensuring extremely long service life. With two pairs of screws running in the same casing, the internal velocities are very small - consequently the NPSH R is practically the lowest even when the pumps run at motor speeds and while handling viscous products. Opposed screw pitches totally eliminate axial thrusts. Relatively small diameters of screws enables the pump to operate at high speeds directly coupled to prime movers - without the need for speed reducers even while handling high viscous fluids. The seals are always under suction pressure, thus making use of simple, inexpensive seals. The axial flow is without turbulence, rotation, churning, chewing guarantees gentle handling of products. Noise and vibration levels are the lowest. Positive clearance between running parts makes it easier to construct the pump in different materials safely, especially in stainless steel, without the fear of seizing. Thus a variety of fluids can easily be handled by selecting the right materials of construction.

Typical Pumped Media
Crude Oil, Additives, Paraffin, Base oils, Petroleum products, Bitumen, Polyester, Fuel oils - all grades, Residues, Lubricating oils - all grades, Soap, Vegetable oils, Molasses, Vanaspati, Sugar syrup, Fruit Juices, Bilge

Typical Application
Loading & unloading of fuel oil and other products from: Railway wagon rakes, Truck tankers, Barges, Ships and Tankers, Bulk cargo handling
Process pumping of high viscous products such as bitumen, molasses, soap and similar products
Long distance pipeline pumping of viscous products

Oil & Gas, Power Generation, Marine & Navy, Petroleum refineries, Terminals, Depots, Oil blending stations, Steel plants, Fertilizer industries, Petrochemical plants, Carbon black, Food & Beverages, Paper and Pulp
Maximum performance data

upto 15000 lpm

Diff. Pressure:

upto 120 bar

Maximum Operating parameters

1 to 50000 cSt

Fluid Temperature:

upto 350 °C

Material of Construction
Casing options:

Cast Iron / Cast Steel / Fabricated Steel /

Fabricated Stainless Steel
Screw set option:

Carbon Steel / Stainless Steel

Liner options:

Cast Iron / Bronze / Stainless Steel

Sealing Options:

Gland Packing, Mechanical Seal

Construction features
Bearing location:External / Internal
Jacketing options:

Casing / Foot / Cover / No jacketing

Mounting options:

Horizontal foot / Vertical pedestal / Vertical tank

Relief valve options:

Built-in / Line mounted


Relief valves, base frame, coupling, coupling guard, companion flanges, pressure gauges, electric motor, variable speed drives, etc.
Pump mounted on a base plate with above accessories as a ready to install system can be supplied

Salient features

Positive clearance between rotors

No metal to metal contact between rotors
Dry running capability
Negligible wear over years
Axial smooth steady flow
High speed running
Pulsation free output
Negligible vibrations
Insensitive to varying viscosities
Long maintenance free service
Lowest NPSHR
Shaft sealing at suction pressures
Axial thrusts completely eliminated
Interchangeable liner
Adaptability of various MOC


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