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ROYAL IHC
DREDGINGROYAL IHC
IHC TT-PUMP UNITAND IHC OTTER
SUBMERSIBLE DREDGEUNITS FOR SMALL-SCALE, MULTI-PURPOSE DREDGING ACTIVITIES
The IHC TT-Pump, a compact dredge pump unit, and the IHC Otter, a small dredger utilising the IHC TT-Pump, are completing the portfolio of IHC’s hydraulic dredging equipment.
IHC TT-PUMP UNITSSUBMERSIBLE DREDGE UNIT FORMULTI-PURPOSE DREDGING ACTIVITIES
The IHC TT-pump units are a complete range of compactdredge pumps which provide customers with one of themost cost effective solutions to dredge slurry for smallerdredging projects. The dredge pump is mainly used todredge silt, medium sand and gravel.
BENEFITS versatile and flexible high efficiency large sphere passage multi-purpose use cost effective easy to handle, operate and maintain wear resistant Maxidur® 5.
OUR SOLUTION TO YOUR PROJECTTT-pumps can be operated from excavators, suspendedfrom cranes, or be fitted to small pontoons withhoisting or ladder arrangements.
HYDRAULIC POWER PACKThe hydraulic power pack provides power for operationof the TT-pump when attached to an excavator, suspended from a crane or deployed from a pontoon.
JET WATERA separate jet water unit can be supplied for the standard sand production head. The jet water pump is driven directly from the hydraulic power pack.
CUTTERThe jet water for the standard sand production head isnot always capable of fluidising the material to bedredged. For these situations, a hydraulic cutter unit canbe supplied. The rotating cutter head loosens the materialwhich is then picked up by the dredge pump withminimum spillage. The hydraulic cutter unit can only beoperated from a boom or an excavator.
HOSES AND PIPELINESHydraulic hoses, jetting water hoses, and discharge hosescan be supplied when required. Discharge hoses can include rubber hoses, floating hoses and HDPE lines.
EXCAVATOR ADAPTERIHC TT-pumps are supplied standard for suspended wireoperations. For operation from an excavator, an adaptorunit can be supplied.
PRODUCTION SENSORS AND AUTOMATIONFor operational and production management, a range ofsensors and instruments can be supplied. The output datais displayed via an HMI, and includes flow, density, pumpspeed, discharge pressure and depth measurement.
ACCESSORIES
IHC TT-PUMP UNITS
MAIN SPECIFICATIONS
TT 15-65 TT 20-95 TT 24-150 TT 30-250 TT 35-375
PERFORMANCEMax. pump powerMax. working pressure
HYDRAULIC REQUIREMENTSOil flowOil pressure ΔP at motor
JETWATERCapacityPressure
DREDGE PUMP DIMENSIONSSuction diameterDischarge diameterBall passage
WEIGHTBasic pump unit (excl. suction head)Standard sand production headCutter unit
375kW5 bar
880l/min296 bar
280m3/h8 bar
350mm330mm220mm
5,410kg550kg1,450kg
250kW5 bar
610l/min280 bar
210m3/h8 bar
300mm300mm185mm
4,250kg500kg1,375kg
150kW5 bar
445l/min240 bar
145m3/h8 bar
240mm200mm140mm
2,400kg450kg890kg
95kW5 bar
255l/min280 bar
95m3/h8 bar
200mm200mm125mm
1,600kg375kg725kg
65kW5 bar
225l/min205 bar
65m3/h8 bar
150mm150mm95mm
795kg150kg650kg
TT 15-65 TT 20-95 TT 24-150 TT 30-250
CUTTER DRIVEMax. power at shaftOil flowOil pressure ΔP at motor
DIMENSIONSA: Height standard pumpB: Diameter standard pumpC: Height standard sand production headD: Height cutter unit
46kW105l/min296 bar
2,540mm1,600mm3,170mm1,955mm
44kW105l/min280 bar
2,060mm1,450mm2,170mm1,825mm
25kW70l/min240 bar
1,740mm1,250mm2,050mm1,700mm
21kW51l/min280 bar
1,675mm1,050mm1,790mm1,450mm
13kW42l/min205 bar
1,220mm850mm1,300mm1,350mm
TT 35-375
OPTIONAL SUCTION HEADS
A A
D C
B B
IHC OTTERDREDGERS UTILISING THESUBMERSIBLE IHC TT-PUMP
The IHC Otter is a range of compact dredgers serving as platform for deploying the well-known IHC TT-Pump, which provide customers with a compact, cost-effective solution to dredge slurry for smaller dredging projects.
The IHC Otter is mainly used to dredge silt, medium fine sand and gravel and combines the advantages of the IHC TT-Pump unit into a single dredging solution.
KEY FEATURES compact size allowing easy access in confined
waterways and alongside quay walls modular design for configuration
of vertical deployment the standard vertical deployment utilizes
an outboard design, with a moonpool option also available
dismountable design for easy transportation by road, rail or ship
vertical deployment allows for dredging at depths of up to 50 meters
low capital cost making it a suitable option for dredging operations with a smaller budget
rugged and robust the IHC Otter is designed for the harsh conditions
encountered in remote locations.
EASY MAINTENANCEThe design is based on the principles of production maximisation and reliability, and its cost-effective design reduces the need for specialised maintenance personnel.
MODULAR AND EASY TO TRANSPORTThe IHC Otter is constructed from a set of standard modular components that can be used to suit the complete range of IHC TT-Pumps. The components are designed to fit into standard 6m and 12m shipping containers for easy transportation.
DREDGE INSTALLATIONIHC TT-PumpDischarge pipe diameterMax. pump powerMax. working pressure
DIMENSIONLength overall (TT-Pump raised), approx.Length over pontoonsBreadthPontoon depthDry massDraughtTotal installed powerMax. dredging depth
RIGGINGHoisting winch (hydraulic)Line pull, first layerMax. line speed
Mooring winches (hydraulic, 3x)Line pull, first layerMax. line speed
TT 20-95200mm (8")95kW5 bar
14.5m11.4m7.4m1.06m17.6 ton0.31m232kW50m
55kN16m/min
30kN12m/min
TT 24-150250mm (10")150kW5 bar
14.5m11.4m7.4m1.06m19.7 ton0.34m410kW50m
55kN16m/min
30kN12m/min
TT 35-375350mm (14")375kW5 bar
17.6m14.4m7.4m1.06m31 ton0.36m883kW50m
110kN7m/min
30kN12m/min
TT 30-250300mm (12")250kW5 bar
17.4m14.4m7.4.m1.06m27.1 ton0.32m510kW50m
110kN7m/min
30kN12m/min
IHC OTTER - VERTICAL DEPLOYMENT
SPECIFICATIONS
SERVICE AND OPTIONAL PACKAGESIHC can provide a comprehensive list of spare parts, operational and maintenance training, and support to suitthe needs of customers, as well as a variety of optionalpackages such as comfort, HSE, production, positioning etc. to enhance the IHC Otter. Customisation of the IHC Otter can also be requested in order to meet specific project requirements.
BOOSTER STATIONSAdding extra pumping power can significantly help to improve production levels when pumping over longer distances. This can be achieved by using a booster station: a separate additional pump placed along the discharge line.
OPTIONS
IHC TT-pump is suspended from a wire rope dredge depths up to 50m below surface level IHC TT-pump features jet water system for
agitating material during dredging operation
suitable for soil types such as silt, medium fine sand and small stones
best suited for dredging loosely packed material.
OTTER 20v OTTER 24v OTTER 30v OTTER 35v
DREDGE INSTALLATIONIHC TT-PumpDischarge pipe diameterMax. pump powerMax. working pressureMax. cutter power
DIMENSIONLength overall with TT-Pump raisedLength over pontoonsBeam overallPontoon depthDry massDraughtMax. standard dredging depth
SWING WIDTH WITH 35º SWING ON EACH SIDEAt max. dredging depthAt min. dredging depth
RIGGINGHoisting winch (hydraulic)Line pull, first layerMaximum line speed
Mooring winches (hydraulic, 3x)Line pull, first layerMax. line speed
TT 20-95200mm95kW5 bar21kW
16m11.4m7.4m1.06m18.4ton0.33m10m
24.5m28.5m
55kN16m/min
30kN12m/min
TT 24-150240mm150kW5 bar25kW
16.3m11.4m7.4m1.06m19.8ton0.34m10.5m
25m29m
55kN16m/min
30kN12m/min
IHC OTTER - HORIZONTAL DEPLOYMENT
SPECIFICATIONS IHC TT-pump features cutter unit for cutting dense
and compacted material suitable for higher density material such as
compacted soil and clay
not suitable for materials such as hard rock dredge depths up to 10m below surface level.
OTTER 20H OTTER 24H
THE SAND TYPES AS INDICATED IN THE PRODUCTION GRAPHS ARE DEFINED AS FOLLOWS:
SITUSAND TYPE GRAIN SIZE DENSITY
Silt + 50% fine sand 0.059mm 1,600kg/m3
Medium fine sand 0.236mm 1,950kg/m3
Gravel 7.276mm 2,200kg/m3
Dredging depth 10mGeodetic head 4m
The graphs below show the performance of the IHC TT-pump units and IHC Otters. The output is expressed in cubic meters of in-situ solids per effective pump hour, with a maximum volume concentration of 25%, plotted against the discharge length per TT-pump unit type. Depending on the required output these graphs can help in choosing the right TT-pump for the job at hand.
WHICH TT-PUMP IS RIGHT FOR YOUR PROJECT?
MEDIUM FINE SAND
0
100
200
300
400
500
600
700
800
900
500
1,000
1,500
2,000
2,500
3,000
3,500
OU
TP
UT
IN M
3 P
ER
HO
UR
PIPELINE LENGTH IN METRES
TT 15-65TT 20-95
TT 24-150TT 30-250TT 35-375
400
800
300
100
500
200
600
900
0
200
400
600
800
1,000
1,200
1,400
1,600
700
GRAVEL
PIPELINE LENGTH IN METRES
OU
TP
UT
IN M
3 P
ER
HO
UR
TT 15-65TT 20-95
TT 24-150TT 30-250TT 35-375
0
100
200
300
400
500
600
700
800
900
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
SILT AND 50% FINE SAND
PIPELINE LENGTH IN METRES
OU
TP
UT
IN M
3 P
ER
HO
UR
TT 15-65TT 20-95
TT 24-150TT 30-250TT 35-375
The IHC TT-Pump and the IHC Otter, deploying the TT-Pump, are applicable to many small scale dredging activities due to their compact size and easy transportability. Their size and manouverability allows easy access in for instance, confined waterways and alongside quay walls. Their main applications are:
MAINTENANCE DREDGING environmental dredging inland waterways (rivers, canals/waterways, ports/
harbours) reservoir dredging or power plant maintenance.
MINING construction or heavy mineral sand mining alluvial gold or diamond mining oil sands mining tailings.
IHC TT-PUMP AND IHC OTTERPROJECT APPLICATIONS