Home
Services
Products
Application
Client List
Careers
Contact Us
 
           
  Products...        
           
  Three Spindle Screw Pump ( Series T3S )  
 
 

"TUSHACO" - a leading name in the field of Positive Displacement Rotary pumps since 1968 introduced for the first time in India the concept of "Three Screw Pumps" already in 1970's. Foreseeing the growing demand for totally reliable fuel and lube oil pumps for Thermal and Hydel Power Plants, Fertilizer, Chemical and Steel Projects a beginning was made by importing critical components and building pumps locally. Over decades, thousands Three Screw pumps have been manufactured and delivered. Valuable experience gained and modern manufacturing and testing facilities established under joint collaboration from world-renowned German company. 

 

Today TUSHACO is undisputed leader not only in Three Screw pump technology but equally in the other types - namely Twin Screw, Single Screw/ Progressing Cavity - as well as the conventional types like Shuttle Block, Internal Gear, External Gear, Trochoidal and Vane types. This unique position, combined with years of Application Engineering expertise and knowledge of Process Engineering requirements offers direct benefit to customers by the right choice of the pump design selection for almost any given duty parameters.

TUSHACO pumps are on the OEM list of practically all major plant and equipment manufacturers, consulting organizations and has met with approvals from third party inspection agencies - national and international.

Reliable performance of thousands of TUSHACO Three Screw pumps in India and overseas - over decades is the silent testimonial of the hard and dedicated efforts behind this success.

Working Principle

TUSHACO Three Screw pumps employ just three screw elements - one power screw and two idler screws running in the three precision bores in the housing or liner. The screws are so profiled that they form a liquid tight seal between the thread. As the screws rotate, pockets/ cavities are formed where liquid gets trapped and conveyed from one end of the infinite stroke. This results in smooth, pulsation free flow with extremely low noise and vibration levels, almost impossible to be achieved by any other design of positive displacement or other types.

The power rotor does not drive the idlers as commonly believed. The hydraulic forces acting on screw flanks turn the idlers torquelessly thus reducing the friction. The idlers simply roll over the root diameter of idler dia.reduce the unit pressure, centralize the power rotor and absorb the radial loads. A balance piston integrally machined on power rotor takes care of axial thrusts.

While in operation, the screws are in hydrodynamic balance on film lubrication and do not require any additional bearings. The one ball bearing often used is only for axial positioning of rotor and safer operation of mechanical seals. Small rotor dimensions enable the pump to be operated at high speeds directly coupled 3000 or 3600 RPM motors or other prime movers. Such unique design and features has demonstrated excellent reliability with pumps in operation continuously non-stop for decades together without replacement of any components or maintenance on clean fluids.

Salient Features

High reliability

High speed capability

Long service life

Insensitive to viscosities

Negligible maintenance

High pressure capability

High efficiency

Axial flow - no churning, chewing or shearing

Self priming

Excellent suction capability

Smooth pulsation free flow

Hydraulic balancing of forces eliminates need for any bearings

Low noise and vibrations

 

Performance Range

TYPES

CAPACITY
LPM

PRESSURE
Kg/cm2

VISCOSITY
RANGE cSt

TEMPERATURE
°C

T 3S FP

10~100

40

3~750

180

T 3S L

20~500

16

3~750

180

T 3S N

20~2500

64

3~1500+

180*

T 3S M

20~2000

120

3~1000+

180*

T 3S H

20~1000

250

3~1500

180

Figures given are indicative for range only considering speeds upto 2900 RPM.

Three screw pumps can run to speeds upto 10000 RPM under special conditions.

+ Higher viscosities can be handled upto 50, 000 cSt or more.

* Higher temperatures upto 250°C can be handled with special execution.

Typical Applications

Fuel Oil Service:
Fuel oil burner service for Thermal Power Plant/ Industrial Package, Boilers, Furnaces, Kilns and Combustion systems.

Fuel transfer and booster service for Captive Diesel/ Gas Turbine Plants and Industrial Combustion Systems, Fuel Oil Circulations and Centrifuge Feeding. Tank farm tank to tank transfers.

Hydraulic Duties :
Hydraulic governing service for Water Turbines, Inlet Penstock Valves.

Low and medium pressure hydraulic applications, high pressure jacking oil service for rotor lifting for Turbines/ Compressors/ Alternators.

Lubricating Duty :
Pressure lubrication and cooling of bearings for Turbo Machinery, Gear Boxes, Bearing Lubrication of Coal Mills, ID/FD Fans, Diesel Engines, Steel Rolling Mills, Air pre-heater guide bearings, Compressors.

Seal Oil Service :
Hydrogen cooled Generators, Gas and Refrigeration Compressors.

 
 

 
Best view Resolution 1024 X 768  
Powered By: Shilpa Trade Links Pvt.Ltd