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Using the latest CFD-methods, parameters were found, that enables a significant improvement in bollard pull and at the same time reducing the nozzle resistance at free running speeds.
The solution was found by designing the interior surface of the nozzle for maximum bollard pull, whereas the exterior surface was optimized for high free running efficiency. The nozzle design optimization was performed for the complete propulsor, i.e. including also the underwater part of the propulsion unit itself.
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The application of a nozzle increases the thrust at relatively low ship speeds. Significant savings in fuel consumption can be achieved depending on the number of revolutions and the capacity of the engine. Nozzles are aerofoil shaped rings placed around the propeller.
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Gunclean Toftejorg i65 S
The Gunclean Toftejorg i65 S is a fully programmable single-nozzle tank cleaning machine equipped with an innovative hysteresis clutch.
The Gunclean Toftejorg i65 S unit is part of a comprehensive range of Alfa Laval equipment for keeping the insides of tanks and storage holds clean. This particular model is specially designed to tackle the most challenging fixed-installation tank cleaning duties aboard chemical carriers, product carriers and bulk carriers, as well as in tanks used on offshore installations.
The Gunclean Toftejorg i65 S is the first tank cleaning machine on the market to feature a hysteresis clutch with built-in speed adjustment. This innovative construction is a substantial improvement over standard magnetic clutches, because it eliminates the slippage and false starts often associated with magnetic clutches as well as the leakage risks that stem from the need for a separate speed adjustment shaft.
The combination of design features that provide better power transmission and less friction, fewer wearing parts and the extensive use of high-durability materials (including advanced ceramics) together makes the Gunclean Toftejorg i65 S an excellent solution for the reliable, cost-effective cleaning of shipboard tanks and holds.
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SC 30 T is a modern tankcleaning machine specially developed for:
Chemical carriers
Product carriers
Off-shore supply vessels
Industrial applications
Crude oil carrier
The machine is driven by the cleaning media by means of a fixed installed turbine with an integrated, programmable drive unit and is delivered with the following features available as standard:
Cleaning pattern for all types of cargo
Permanent lubrication (dry drive unit)
Single or twin nozzle type
Cover for programming parts
Rapid manual overdrive
Passivation allowed for
Fully self-draining design
Separated turning and lifting moment(no worm-gears inside tank)
Options:
Magnetic transmission
Connection to WashTack (TM)
Tancleaning ball valve with quick coupling
Prewash program
Superfast cleaning head with off-set nozzle system
High capacity machine
The nozzle(s) directing the cleaning media perform a horizontal spiral motion giving a single or crossing helical pattern wit a perfect cleaning result even in areas below horizontal stringers, longitudinals, corrugated bulkheads or other tank internal structures.
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XL-500-2
56 mm L arm, 2 nozzles
Op. pressure: max. 500 bar
Flow rate: 400 l/min
Access opening: min. 170 mm dia.
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Typical applications:
Cleaning and surface preparation works on
-Oil and gas storage tanks
- Ship hulls
- Concrete facades
- Holds and bunkers
Working width: 375 mm
Op. pressure: up to 3000 bar
Flow rate: up to 40 l/min
Vacuum: up to 0,5 bar dependant on work surface
Suction connection: DN 100
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The system is designed for cleaning vessels up to 20m in diameter. It is lowered into the vessel and fixed in position by three extendable support arms. The two hydraulic blasting heads are positioned at the work surface by hydraulically extended work arms mounted on a turntable.
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The Polar Jet® PJ 303CP is a fully programmable, multiple nozzle Tank Cleaning machine equipped with pitch and speed control. This Model can be supplied with 2, 3, 4 or more nozzles according to the specific cleaning requirements of the tank configuration. Capacity range per nozzle: 4 to 28 m3/h.
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The Polar Jet® PJ 123T is a deck mounted, fully programmable, multiple nozzle Tank Cleaning Machine. This model can be supplied with 2, 3, 4, or more nozzles according to the specific cleaning requirements of the tank configuration. Capacity range per nozzle: 13 to 60 m3/h.
Movement of the nozzles can be set to work between any angle from 0 to 180 degrees. For example, the PJ 123T can be set to work only between 0 to 45 degrees with reverse direction for concentrated bottom cleaning – or any other suitable angles.
Nozzle movement is controlled by the integrated turbine driven control unit. providing a controlled rotation in the horizontal plane, combined with a slow, controlled vertical movement. This means that the nozzle performs helical patterns.
The Turbine driven nozzle pitch for the PJ 123T is 3 degrees. Nozzle angle can be manually adjusted for heavy spot cleaning programs. Adjustable guide vanes located in front of the turbine control speed, which should be between 1 and 2.5 RPM.
Polarmarine provide in-house Shadow Diagrams using 3-Dimensional CAD for model Selection, Quantity, Positioning and Main Pipe Lengths to optimize cleaning coverage per unit.
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The Polar Jet® PJ 50T is a non-programmable, twin nozzle Tank Cleaning machine for use in Crude Oil, Product and Chemical Tankers and many other industrial applications.
The asymmetrically opposed nozzles are driven by an integrated turbine and gearing unit. The specially designed turbine gives safe and reliable starting and stable speed control.
The PJ 50T can be flange mounted on a standpipe either vertically, from the tank deck or bottom, or horizontally from the sides
The Polar Jet® PJ 50T non-programmable twin nozzle units can be installed submerged down into the tanks as an effective and cost efficient compliment to any deck-mounted machines.
Polarmarine provide in-house Shadow Diagrams using 3-Dimensional AutoCAD for model Selection, Quantity, Positioning and Main Pipe Lengths to optimize cleaning coverage per unit.
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Scanjet SC 50/75A is driven by means of a portable programmable airdriven drive unit.
Full versatility is provided by free selection of single nozzle or twin nozzle type of system and multistage nozzle levels give a tailor made installation for each specific vessel.
The nozzle(s) directing the cleaning media perform a horizontal spiral motion giving a single or crossing helical pattern with a perfect cleaning result even in areas below horizontal stringers, longitudinals, corrugated bulkheads etc.
General advantages:
Maintenance free system below deck
Fully programmable machines
Prewash facilities provided
Cleaning with closed hatch conditions
Minimzed cleaning time
Filter installed in machine
Minimized cleaning media consumption
Portable cleaning machines, long hoses et. eliminated
Passivation of tanks allowed for
Production, design and spares direct from factory
Optimal tank cleaning economy
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Scanjet SC 50/75T is a mediadriven machine by means of a fixed installed turbine driven with an integrated programmable drive unit.
Full versatility is provided by free selection of single nozzle or twin type of system and multistage nozzle levels give a tailor made installation for each specific vessel.
The nozzle(s) directing the cleaning media perform a horizontal spiral motion giving a single or crossing helical pattern with a perfect cleaning result even in areas below horizontal stringers, longitudinals, corrugated bulkheads etc.
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The Polar Jet® PJ 30CP is a fully programmable, single nozzle Tank Cleaning machine equipped with pitch and speed control. Capacity range: 13 to 90 m3/h.
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These tank cleaners are specially designed to be mounted in a horizontal or vertical position. Cleaner is operated from outside the tank and can rotate 360° around its axis & 90° perpendicular to this axis. Made from stainless steel, this unit weighs a mere 100lbs. Customer must supply data for the companion flange to mount to.
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Scanjet Model SC 30 T is driven by the cleaning media by means of a fixed installed turbine with an integrated programmable drive unit. The permanent lubrication means an oil-free drive unit and the patented magnetic transmission allow an exchange of the drive unit without exposing the tank to the outside atmosphere.
The single nozzle concept gives a very solid and powerful jet with an optimized cleaning result on all tank surfaces. It has a unique separated turning and lifting moment and a rapid manual overdrive for sector cleaning setting.
The nozzle assembly is self draining and the machine has a full 0-180 degrees cleaning range.
The patented design is in accordance with IMO-Marpol requirements.
Fully prepared for integration with WashTrac TM, our tank cleaning monitoring system.
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The Polar Jet® PJ 25 is a twin nozzle, nonprogrammable tank cleaning machine ideal for portable use. Particularly suitable for corrugated tanks where cleaning is required at more than one level without the use of fixed multi-nozzle systems.
It can also be used as a fixed installation either mounted on a standpipe from deck or submerged, installed in the bottom of the tanks as an effective compliment to any deck-mounted machine.
The asymmetrically opposed nozzles are driven by an integrated turbine and gearing unit providing safe and reliable starting and stable speed control.
Rotation in the horizontal plane combined with vertical movement provides an almost spherical cleaning pattern. Speed will vary slightly according to nozzle size and pressure with one full cycle taking approximately 30 minutes.
The PJ 25 can be supplied complete with tank cleaning hose, deck flange, hose saddle and deck pipe coupling.
Polarmarine provide in-house Shadow Diagrams using 3-Dimensional CAD for model Selection, Quantity, Positioning and Main Pipe Lengths to optimize cleaning coverage per unit.
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Scanjet portable tank cleaning machines and accessories
– Optimised cleaning effect
– Easy handling
– Safe operation
Scanjet’s range of portable machines and accessories can be used either as a
complement to our fixed systems or as stand alone system.The turbine driven SC 15TW and SC 45TW are available in both bronze and stainless steel versions and are therefore suitable for any type of tank cleaning operation. Our range of accessories, whether it is hoses, hose connectors or adapters, y-pieces
or valves, also covers any type of installation.
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The Polar Jet® PJ 120T is the only tank cleaning machine on the market with programmable sector cleaning. It is a deck mounted, fully programmable, single nozzle Tank Cleaning machine equipped with pitch, speed and angle limit controls. Movement of the nozzle can be set to work between any angle from 0 to 180 degrees. Capacity range: 40 to 150 m3/h.
For example, the PJ 120T can be set to work only between 0 to 45 degrees with reverse direction for concentrated bottom cleaning – or any other angle parameters of 30 degrees or more
Nozzle movement is controlled by the integrated turbine driven control unit providing a controlled rotation in the horizontal plane, combined with a slow, controlled vertical movement. This means that the nozzle performs helical wash patterns.
The Turbine driven automatic nozzle pitch for the PJ 120T is 3 degrees. This may be manually adjusted for heavy spot cleaning programs. Adjustable guide vanes located in front of the turbine control speed, which should be between 1 and 2.5 RPM.
Polarmarine provide in-house Shadow Diagrams using 3-Dimensional CAD for model Selection, Quantity, Positioning and Main Pipe Lengths to optimize cleaning coverage per unit.
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Scanjet Model SC 90 T2 is driven by the cleaning media by means of a fixed installed turbine with an integrated programmable drive unit. The permanent lubrication means an oil-free drive unit and the patented magnetic transmission allow an exchange of the drive unit without exposing the tank to the outside atmosphere.
The single nozzle concept gives a very solid and powerful jet with an optimized cleaning result on all tank surfaces. It has a unique separated turning and lifting moment and a rapid manual overdrive for sector cleaning setting.
The nozzle assembly is self draining and the machine has a full 0-180 degrees cleaning range.
The patented design is in accordance with IMO-Marpol requirements.
Fully prepared for integration with WashTrac TM, our tank cleaning monitoring system.
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SC 40RT family is a robust and very flexible type of tank cleaning robots specially designed for marine, offshore and industrial application.
SC 40RT gives the user a possibility to optimize the cleaning, with minimal use of time, energy and cleaning media.
Advantages with SC 40RT:
Stainless steel AISI 316 and PFTE for all material inside tank
Efficient cleaning radius up to 26 meter
Available in fixed as well as portable versions
Maintenance free inside tank
Remote control operation possible
Can be equipped with 2 nozzle
Ideal for offshore drilling mud tanks
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Propeller Design
All ships have individual needs. Speed is important for some ships. Towing pull is more important for others. To satisfy these needs Finnøy use the most suitable software together with Finnøys knowledge when designing propeller blades. The propeller blade is designed for best possible performance regarding thrust, efficiency, noise and vibration. The blades are ground and balanced according to ISO 484 standards.
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