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Three Spindle Screw Pump ( Series T3S )

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Three Spindle Screw Pump

"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.

 
Two Spindle Screw Pump ( Series TD

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Two Spindle Screw Pump

TUSHACO Twin Screw pumps employ a unique principle that makes it the only choice for certain applications. No other design of Positive  Displacement Rotary pumps offer so much versatility in the operating parameters with guaranteed total reliability and maintenance-free service.

Two Spindle Screw Pump

Working Principle
A pair of specially profiled screw, 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 NPSHR 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 sealings always under suction pressure, thus making use of simple, inexpensive seals. The axial flow without turbulence, rotation, churning, chewing guarantees gentle handling of products. Noise and vibration or ---- levels are about 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.
TUSHACO PUMPS have earned a reputation of being the most reliable Positive Displacement Pumps for practically any given application since 1968 due to the widest choice of designs available and excellent knowledge of application engineering. Continuous Research and Development together with modernization with CNC machines and testing facilities has enabled us to accept challenging jobs. Thousands of TUSHACO pumps in operation to the total satisfaction of the users in core industries throughout the country and abroad are a silent testimony.

Salient Features

Positive clearance between rotors

Insensitive to varying viscosities

No metal to metal contact between rotors

Long maintenance free service

Dry running capability

Lowest NPSHR

Negligible wear over years

Shaft sealing at suction pressures

Axial smooth steady flow

Axial thrusts completely eliminated

High speed running

Interchangeable liner

Pulsation free output

Adaptability of various MOC

Negligible vibrations

 

Typical Parameters

Temperature: -30 to +350°C

Viscosity: 1cSt to 50,000 cSt or more

Pressure: Normal 16 bar/ 24bar, with special designs upto 50 bar

Specialties: Partial heating/ complete heating/ cooling arrangements

Sealing: Stuffing box/ mechanical seal with or without quenching/ heating/ cooling

Mounting: Horizontal foot mount/ vertical pedestal

Accessories: Relief valves, base frame, coupling, coupling guard, companion flanges, pressure gauges, electric motor/ diesel engines, variable speed drives and as per customer requirements.

Typical Applications

Loading / unloading of fuel oil and other products from: Railway wagon rakes, Truck tankers, Barges, Ships and Tankers.

Bulk cargo handling.

Lubrication, circulation and cooling.

Process pumping of high viscous products, bitumen, molasses, soap and similar products.

Long distance pipeline pumping of viscous products.

Typical Liquid List

Additives

Paraffin

Base oils

Petroleum products

Bitumen

Polyester

Fuel oils - all grades

Residues

Lubricating oils - all grades

Soap

Lyes

Vegetable oils

Molasses

 

Major Industries

Petroleum refineries, Terminals, Depots, Oil blending stations, Thermal power plants, Steel plants, Fertilizer industries, Petrochemical plants, Carbon black, Sugar, Paper and Pulp, Marine.

Applications of Two Spindle Screw Pump.Applications of Two Spindle Screw Pump.
 
Two Spindle Screw Pump ( Series TS )

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Two Spindle Screw Pump

Typical Applications call for Tushaco

  • Uploading all grades of fuel oils from wagons
  • Loading / Uploading of road tankers
  • Cargo oil off - loading from Barges and Ships
  • Transfer and circulation of lubrication, cooling and circulation
  • Handling of viscous products like molasses, soap, bitumen and other similar fluids.

 

Typical Liquid List mastered by Tushaco

  • Additives
  • Bitumen
  • Form
  • Furnace Oil
  • Glycerin
  • LDO
  • LSHS
  • Lubricating Oil
  • Molasses
  • Soap Stock
  • Tar
  • Vegetable oils
  • And a host of other fluids including petroleum products, Naptha, Kerosene and even water or sea water.

Advantages make Tushaco the leader

  • Self priming even in adverse condition
  • Rotating elements free from metal to metal contact
  • Reduced friction loss
  • No damage on dry run
  • Negligible wear and tear
  • High section lift
  • Very low NPSHR value
  • Efficient to handle low or high viscous materials
  • In - built mechanism to clear entrapped gas / air
  • Designed to run at high speed while handling high viscous materials
  • No need for any gear reducers - saves cost, power and space
  • Compact installation - horizontal or vertical
  • Maintenance free
  • Capability of cold starting

Key Industries rely on Tushaco

  • Petroleum Refineries
  • Petroleum Terminal and Depots
  • Steel Plants
  • Thermal Power Station
  • Petro Chemical Industries
  • Food Processing Plants
  • Fertilizer Plants
  • Captive Diesel Power Plants
  • Marine applications

TS Series Data

Model TS

Intel outlet size ANSI 150 # or Din NP 16

Capacity range @ 1450 rpm M3 / Hr.

105

3" ( NB 80 )

10 to 24

135

6" ( NB 150 )

20 to 100

180

8" ( NB 200 )

80 to 150


Temperature of pumped liquid

up to 1800C

Inlet pressure

up to 6 bars

Outlet Pressure

up to 16 bars

Viscosity range

0.6 to 1500 cSt

Relief Valve 

built on

Jacketing Arrangement

optional

Executions : Internal bearings, External bearings, Horizontal / Vertical of road tankers, Relief Valve and other features. MOC: CI, CS, SS 304 / 316 or other.

 
External Gear Pump ( Series EG )

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WORKING PRINCIPLES AND SALIENT FEATURES :

Only two rotating parts matting externally having principle of gear within gear.

Single gland construction reduces leakage to minimum.

Gears are well supported with the help of 4 bearings.

Self priming in nature

External Gear Pump

RANGE

Capacity Available

:

from 250 lpm to 1700 LPM

Normal Pressure

:

Upto 7 bar
Special hydraulic pumps are available for pressure upto 250 bar.

Normal Temperature

:

Upto 150ºC

Normal Viscosity

:

from 1 cSt to 30,000 cSt

TYPICAL APPLICATIONS

Transfer of liquids

Booster application

COST IMPLICATIONS

Very economical and costs fraction of the cost of gear, vane or screw pumps

Power consumption is less than conventional pumps

 

 

 

 

 

 

Internal Gear Pumps ( Series IG )

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The very first pump produced by TUSHACO in 1968 was an Internal Gear Pump Model R-1-G for low-pressure burner service - till this day it is in production with great success. Subsequently only TUSHACO had the foresight to introduce several other exotic designs, to take care of growing industrial demands, thus placing themselves on the forefront in the field of Rotary Positive Displacement Pumps. Experience gained over years in designing and building Rotary Pumps combined with knowledge in Application Engineering has resulted in this development of New Stainless Steel Internal Gear Series specifically for food, chemical and pharmaceutical industry. Computer aided designs, CNC in-house machining facilities and sophisticated test beds, together with TUSHACO dedication made instant success of the New Internal Gear "IG" series from day one.

Internal Gear Pumps

Innovation, simple construction has ensured very easy maintenance and totally reliable hassle  free installation. A glance at the reference list of scores of pumps delivered for New Food  Processing and Industrial projects within a short period is a silent testimony for TUSHACO  performance.
Working Principle
TUSHACO IG series employs proven Internal Gearing (Gear within Gear) principle for pumping. The main gear is keyed to the drive shaft, and rotates concentric in the pump casing. Idler is located on an eccentric pin on the front cover to rotate freely and meshes with main gear when assembled. A crescent shaped partition precision machined on the front cover maintains a small, but positive clearance to achieve perfect scaling between parts. As the gears come out of mesh, a partial vacuum is created, forcing the fluid to rush into the pump casing and fill in the voids between the teeth. Both gears rotating in the same direction of rotation gently transfer the fluid to the delivery port. The resulting action is a smooth-steady flow; low in pulsation, noise and vibration.

Single shaft design well supported on outboard bearing (except for one inside sleeve bearing) enables to pump products even with poor lubricating value unlike in the external gear pumps. External bearing construction offers easy access the pump components i.e., rotor set and even pump casing simply by removing the front cover without disturbing drive parts, bearings etc., and in place. Block pump mounted integrally on hollow shaft gearbox automatically reduces the speed (in several ratios) and enables even the pump rotor to be pulled out without disturbing the drive! It is easily possible to jacket front and rear covers for products heating - thus making the design unique and versatile - ideally suited for process pumping.

Salient Features

Smooth quite flow

Reversibility

Excellent self priming

Bracket/ Gear box mounting allows free expansion/ contraction - alignment not affected

Insensitive to viscosities

Easy maintenance

All metal construction, no contamination

Built-in reducer offers ideal speed range 240~960 RPM

Single sealing, external bearing

Slow speeds ensure better pumping & longer life

Low noise and pulsation

Reduced maintenance

Construction
The IG series is modular developed with excellent interchangeability. The pump is available either as bracket mounted 'BM' or gearbox mounted 'GM" models. The bracket mounted casing construction provides stress free operation while handling products at higher temperatures. The major components are casing, front cover, rear cover, seal box (casing parts) and rotor set (rotor, idler and shaft). Most casing components are made by lost wax process for better finish and grain structure.
'GM' version offers a choice of different speed ratios, making it easy to handle viscous products besides eliminating problems of alignment, extra set of coupling. Standard 4 pole or 6 pole motors can be directly coupled to such units making it very reliable, compact and clean  drive. Another unique feature is the adjusting clearance between rotor set and cover by means of rotor positioning device enabling to restore pump capacity even after wear and tear after a long use.
Pumps can be equipped with Heating/ Cooling Jacket on front cover/ rear cover and in some  cases also Pump Housing. Choice of Mechanical Seal/ Stuffing box is available for shaft sealing.

Typical Parameters

Capacity

upto

800 LPM

Pressure std.

upto

7 kg/cm2

Pressure spl.

upto

14 kg/cm2

Viscosity

upto

100,000 cSt

Temperature

upto

200°C

Typical Liquid List

Baby Foods

Fruit Concentrates

 Lecithin

 Soap

Batter

Fruit Drinks

 Lotions

 Soups

Butter

 Fruit Fillings

 Margarine

 Starch

Caramel

Fruit Puree

Mayonnaise

 Sweeteners

Chewing Gum Base

 Fudge

 Molasses

 Syrups

Chocolate

 Gelatin

 Oils

 Soft Drink   Concentrate

Coffee

 Glucose

 Peanut Butter

 Tomato Puree

Cookie Dough

 Gums

 Printing Ink

 Tomato Paste

Cottage Cheese

 Honey

 Pudding

 Tooth Paste

Curd

 Ice Cream

 Putty

 Wheat Gluten

Extracts Flavoring

 Icing

 Red Chilly Paste

 Whey

Fondant

 Jams

 Salad Dressings

 Yeast

Fats

 Jellies

 Sauce

 Yeast Slurry

Frostings

Ketchup

 Shampoos

 Yogurt

 
Shuttle Block Pump ( Series SL )

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WORKING PRINCIPLES AND SALIENT FEATURES :

Unique pumping principle - a combination of Rotary and Piston pump- two double acting pistons in their respective cylinders at right angles to each other.

Rotation of rotor causes reciprocating movement of shuttle and piston.

Self priming

Single shaft design with long sleeve-bearing support and external ball bearing.

Single gland construction reduces leakage to minimum.

Choice of Mechanical seal and oil seals available.

Specially designed for transfer applications.

Front pull out design permits inspection of parts without disturbing the pipe connection, couplings or prime mover.

Slow speed operation contributes to high reliability and less maintenance.

Product is pumped without shear, foaming, agitating, heating, emulsifying or chewing.

Pumping elements are of simple geometric form. Parts can be manufactured locally in any part of the world by a small repair shop.

Micrometer Axial shaft position device permits controlled clearance between rotor face and cover. Even after long use wear can be compensated by simple adjustment at site without disturbing pipe line or motors.

Pump can be supplied in partial or full heating arrangement.

Pumps available with built in relief valve.

Shuttle Block Pump

RANGE

Capacity

:

from 250 lpm to 970 LPM

Pressure

:

Upto 6 bar

Temperature

:

Upto 150ºC

Viscosity

:

from 1 cSt to 30,000 cSt

Models available

:

3

 

TYPICAL APPLICATIONS

Fuel oil transfer, loading and unloading

Edible oil transfer

Tank to tank transfer in process plant.

For all cases involving viscosities higher than 200 cSt

 

COST COMPARISON

Very economical and costs fraction of the cost of gear, vane or screw pumps

Power consumption is less than conventional pumps

 

TECHNICAL COMPARISONS

Simplest of all Positive Displacement Pumps

Most compact for any given capacity compared to other Positive Displacement Pumps

Field maintenable. (In-situ repairs permitted !)

For further details refer to catalogues as well as liquid list as well as application list.

 
Progressing Cavity Pump - PC ( Series T1S )

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Design and Operation

Tushaco progressing cavity pump is a positive displacement rotary pump. The actual pumping elements of the pump are rotor and stator. The single helical rotor rolls eccentrically in a double threaded helix stator of twice the pitch length. A series of sealed cavities 180° apart are created that appear to progress from suction to discharge during one rotation of rotor. 

Progressing Cavity Pump

The opposing cavities fill and empty simultaneously resulting in a pulsationless flow.The fluid travels axially with relatively low velocity and minimal agitation.The stator is made of a resilient elastomeric material and bonded to the stator tube. The important feature of the pumping principle is the ability to handle slurries and solid particles. The elastomer stator also permits passage of solid particles due to elastomeric deformation. The compression fit of the rotor and stator enables the Tushaco progressing cavity pumps to handle gaseous and low viscosity liquids. The pressure capabilities of the pump are a function of the number of cavities. Tushaco progressing cavity pumps are available in a wide variety of materials - cast iron or stainless steel wetted parts and 10 standard elastomer materials. Tushaco versatile progressing cavity pumps are rugged, compact and highly efficient.

Fluids, which are delicate, shear sensitive or abrasive, low or high viscosity, with fibres, with high air content, or large solids, can be conveniently handled by Tushaco progressing cavity pumps.

Salient Features

Sturdy drive design provides strength for rigorous continuous operation.
 Unique pivot-joint design extends service life and reduces replacement cost.
 Close coupled models with built-on speed reducers offer compact pumping unit.
 Stators are available in a wide range of elastomers.
 Suction lift to 28' w.c. (Water column)

Possible drive arrangements include:
 Direct drive with motor
 Through gear box
 V-belt pulleys
 Variable speed drives
 Special drives such as hydraulic, with I.C. engines.

Technical Parameters

Capacity:

5 to 2700 lpm

Differential Pressure:

6 to 24 bar

Temperature:

from cryogenic to 120°C

Viscosity range:

1 to 100,000 cp

Typical Industries, Applications & Fluids

INDUSTRIES

APPLICATIONS

FLUIDS

Municipal/ Industrial

Transfer Service Sampling

Polymer Feed Dewatering Sludge Transfer

Chemical Feed

Effluent with & without solids, Milk of Lime

General Sewage Slurry, Media

Protective Chemicals

Industrial

Centrifuge Charging, Transfer, Filter Charging

Kiln Charging Drainage, Metering, Tank Loading/ Unloading

Pit Emptying Gas Scrubbers

Acids, Adhesives, Caustic Soda, Cellulose, Cement Slurry

Dye Liquor, Dye Baths, Flouring, Plaster, Grout,Ink

Lyes, Mortar, Coal Slurry, Lime Slurry

Chemical

 Process Transfer

Loading/ Unloading, Metering

Collecting

Acids, Adhesives, Colours, Cosmetics, Detergents

Glue, Lacquers, Hair Oil, Hand Washing

Cream, Paints, Shampoos, Waxes

Food Process & Production

 Process Transfer

Loading/ Unloading, Metering

Collecting

Alcoholic Beverages, Apple Puree, Baby Food, Beer, Beet Sludge, Biscuit Dough, Citrus Fruit Masher

Cream Cheese, Edible Oil, Eggs, Raw Fats, Fish Residues, Fruit & Berry Masher, Honey, Ice Cream

Lard, Meat Extract, Milk, Mustard, Tomato Paste, Vegetable Oil, Wine, Yeast

Petrochemical Process & Production

 Transfer

Loading/ Unloading 

 Metering

Crude Oil, Oil Sludge

Oil Tank Residues, Processed Oil 

Waste Products 

Utilities

 Transfer

 Loading/ Unloading 

 

 Fuel Oil

 Coal/ Oil Slurry

 Coal/ Water Slurry

 
Internal Lobe Pump ( Series RT )

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WORKING PRINCIPLES AND SALIENT FEATURES :

Only two rotating parts having principle of gear within gear but without crescent.

In built features of speed reduction as pinion is rotated at prime mover speed and outer gear rotates at lower speed.

Smooth pulsation free flow with low noise level.

Choice of mechanical seal or oil seal

Single short shaft well supported at both the ends with self lubricating bearings.

Precision machined components to guarantee high volumetric efficiency.

Self priming pump with high suction capabilities.

Compact pump as compared to other type of gear pumps

Internal Lobe Pump

RANGE

   

Capacity

:

from 3 to 40 LPM

Pressure

:

Upto 7 bar

Temperature

:

Upto 110ºC

Viscosity

:

from 1 cSt to 1000 cSt

Models available

:

7

TYPICAL APPLICATIONS

Transfer and Barrel unloading

Pressure lubricating & cooling of bearings & gear boxes.

Pumping, heating, cooling and filtering units.

Pre-lubrication of components of machinery before starting.

COST COMPARISON

Very economical and costs fraction of screw pumps

Power consumption is less than conventional pumps. Hence economical in operation.

Internal Lobe Pump ( Series RTBP )

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WORKING PRINCIPLES AND SALIENT FEATURES :

Only two rotating parts having principle of gear within gear but without crescent.

In built features of speed reduction as pinion is rotated at prime mover speed and outer gear rotates at a lower speed.

Smooth pulsation free flow with low noise level.

Choice of mechanical seal or oil seal

Pumping element directly mounted on motor shaft resulting in extremely compact design. No alignment required.

Light weight and portable.

Precision machined components to guarantee high volumetric efficiency.

Base plate and couplings are eliminated

The pump rotates concentric with motor and does not require checking of alignment.

Pumps available with built in relief valve.

Internal Lobe Pump

RANGE

Capacity

:

from 3 to 40 LPM

Pressure

:

Upto 7 bar

Temperature

:

Upto 110ºC

Viscosity

:

from 1 cSt to 1000 cSt

Models available

:

4

TYPICAL APPLICATIONS

Transfer and Barrel unloading

Pressure lubricating & cooling of bearings & gear boxes.

Pumping, heating, cooling and filtering units.

Pre-lubrication of components of machinery before starting.

COST COMPARISON

Very economical and costs fraction of screw pumps

Power consumption is less than conventional pumps. Hence economical in 

 
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