Double-Walled Pump

DREDGE PUMP

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Single-Walled Pump

Capacity Head Impeller Speed

EfficiencyInlet

Diameter Outlet

Diameter NPSHr

Max Flowed Particle [mm]

Pump WeightProduct No.

[m /hr] [m] [r/pm] [%] [mm] [mm] [m] Five Pieces Three Pieces [T] MDRE080-DP101 700--1100 20--45 500--750 65--70 300 250 4 132 220 4.5 MDRE080-DP102 900--1500 40--60 500--650 70--74 350 250 4 86 144 4.6 MDRE080-DP103 1500--2200 30--65 400--550 74--78 450 300 4 144 241 8 MDRE080-DP104 2000--3000 40--65 400--550 74--78 450 350 4 147 245 8.8 MDRE080-DP105 3000--4000 35--67 350--500 76--80 600 450 4.5 125 254 12 MDRE080-DP106 4000--5500 40--65 350--450 78--80 650 500 4.8 150 250 17 MDRE080-DP107 5000--9000 55--80 320--400 81--85 650 600 6 160 220 35 MDRE080-DP108 8000--12000 60--85 280--380 83--85 750 700 6 180 280 50 MDRE080-DP109 10000--15000 50--70 260--360 79--80 850 800 6 200 300 58 MDRE080-DP110 12000--19000 50--75 280--330 83--85 950 900 6 210 320 85 MDRE080-DP111 16000--25000 23--76 180--290 85--87 1100 1000 6 230 350 126

All sizes are approximate, other sizes available on request.

Parameters

Single-walled pumps have a compact, economic and robust design with a long, effective operating life and are easy to maintain.

Double-walled pumps are fitted with an external pump housing which allows the internal pump housing to be constructed from

extremely wear-resistant material. This also means a smaller part of the wall thickness is needed for mechanical strength and

a larger part is available for wear losses.

The outer housing also offers optimal security. In case of fracture of the internal pump housing, the outer housing prevents

flooding of the pump room.

Parameters

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New TypeWide ChiselConventional Type

CUTTER HEAD

Dia

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Pipe Inner

Dia Rotated

Speed

Product No. [mm] [mm] [rpm]

Blade No.

MDRE080-CH101 250-300 830 0-34 5 MDRE080-CH102 350-400 955 0-35 5 MDRE080-CH103 350-400 955 0-30 5 MDRE080-CH104 400-450 1330 0-30 5 MDRE080-CH105 500-550 1550 0-30 5\6 MDRE080-CH106 600-650 1750 0-32 5\6 MDRE080-CH107 600-650 1750 0-30 5\6 MDRE080-CH108 600-650 1750 0-24 5\6 MDRE080-CH109 600-650 1830 0-30 5\6 MDRE080-CH110 650-700 2000 0-30 5\6 MDRE080-CH111 700-750 2150 0-30 6 MDRE080-CH112 800-850 2260 0-30 6 MDRE080-CH113 850-900 2330 0-30 6 MDRE080-CH114 900-950 2400 0-30 6

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Product No. Dia

of Suction

Pipe Inner

Dia Rotated

Speed Blade

No.

[mm] [mm] [rpm]

MDRE080-CH201 250-300 830 0-34 7-8 MDRE080-CH202 350-400 955 0-35 7-8 MDRE080-CH203 350-400 955 0-30 7-8 MDRE080-CH204 400-450 1330 0-30 7-8 MDRE080-CH205 500-550 1550 0-30 8-9 MDRE080-CH206 600-650 1750 0-32 8-9 MDRE080-CH207 600-650 1750 0-30 8-9 MDRE080-CH208 600-650 1750 0-24 8-9 MDRE080-CH209 600-650 1830 0-30 8-9 MDRE080-CH210 650-700 2000 0-30 8-9 MDRE080-CH211 700-750 2150 0-30 8-10 MDRE080-CH212 800-850 2260 0-30 8-10 MDRE080-CH213 850-900 2330 0-30 8-10 MDRE080-CH214 900-950 2400 0-30 8-10

a tooth with a narrower chisel can be selected.

When dredging loosely compacted soil, the digging capabilities of the New Type cutter head result in a better

Parameters

performance in comparison with a Conventional Type cutter head in the same conditions.

For peat, soft clay, loose sand and gravel, teeth with a wide front chisel are typically used. For firmer or harder ground,

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CUTTER LADDRE

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The high-efficiency slow running hydraulic motor drives the cutter shaft and cutter directly. The high starting torque of the motor helps to prevent the cutter from getting stuck.For special purposes electric drives may also be used.

FeaturesFeaturesFeaturesThe cutter ladders are available in two standard types:pipe-type,and box- type.Compare with the box-type cutter ladder, the pipe type is easier to construct, so it is relatively cheap.The ladder is provided with the suction line, side wire swivel sheaves and the ladder front piece.Dredging depth is limited by the performance of the dredge pump.The box-type design is best suited for mounting an submersible dredge pump. This is a strongerdesign for heavy duty and longer wear life, because the box-type makes the whole cutter ladder heavier than the pipe-type. The use of an submersible pump allows for a larger dredged density at depth.

Ladder GearCutter ladder

DREDGING WHEEL

Parameters

Parameters

Suction Tube Dia. M ax D ia. of W heel Width Height Centre Height Rotate Speed Power Product No.

[mm ] [mm ] [mm ] [mm ] [mm ] [ rpm] [kw]

M DRE080-DW 001 450 2700 550 650 1550 0-26 110

M DRE080-DW 002 550 3500 750 800 1875 0-22 270

M DRE080-DW 003 600 3800 750 820 2030 0-20 350

M DRE080-DW 004 650 4000 780 860 2255 0-18 380

M DRE080-DW 005 700 4400 900 995 2490 0-16 558

M DRE080-DW 006 850 6000 1300 1300 3300 0-15 900

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Dredging wheels can be used for different soil types, from peat and clay to sand and soft rock. The buckets can be

fitted with either smooth cutting edges or replaceable teeth of the pick point, chisel point or flared point variety. These

replaceable teeth are the same as those used on cutter heads. Standard dredging wheels are available in a power range

from 20 to 1,000kW and outputs of up to 10,000 tonnes/h.

Dredging wheels are supplied as complete units, including drive and ladder adapter.

They can be used on standard and customised wheel dredgers, or as replacements

for cutter or wheel installations on existing dredgers.

Dredging Wheel

ANCHOR BOOM

FeaturesFeatures

T he operating process is simple: in rest the boom will always move back and away from the cutter

thus preventing the anchor hoisting wire from being dredged up. When the wire is tensioned, the

boom will move above the anchor to brea k it out. When the anchor is broken out of the soil, the wires

will automatically pull the boom forward to the new anchor position. After lowering the anchor, the

boom will fall back into the resting position. Optionally the anchor boom can be delivered with wing

winch, so that the boom can also be moved backwards with a load. LANG E provide a wide range

of anchor booms as well as design and manufacture any other sizes at clients' requirements.

Product No. Hoisting winch Reach Max anchor weight Weight of boom and mast[kn] [m] [kg] [kg]

MDRE080-AB001 40 17 700 3800 MDRE080-AB002 80 17 2000 7100 MDRE080-AB003 14 20 4000 11200

All sizes are approximate. Other sizes available on request.

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Anchor Boom

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SIDE WIRE BLOCK

Side Wire Block

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Side wire blocks are designed to meet the rugged environments a cutter dredge normally encounters. The block is a balanced steel construction, which will always pivot to align to the direction of the side wire. Pivoting of the blocks is done with grease lubricated bronze bushes, which are easy to maintain or replace.

The cable sheave is a welded steel sheave with a hardened groove and a watertight encased bearing. The diameter of the sheave is choosen extra large, to reduce wear on the cable. Replaceable wear rings are fitted to guide the cable into the sheave.

FeaturesFeatures

SWIVEL BEND

LANGE swivel bends are a good option when working with a floating pipeline. The bend can adjust easily to the orientation of the CSD while this is making its dredge swings. The swivel bend will have less wear than a dredgehose and is much more flexible due to a much larger rotation angle.

FeaturesFeatures

For turning, the swivel bend is fitted with a large grease-lubricated bearing between the bends.To take on the forces exerted by the floating pipeline, a pivot with a self lubricating bush is fitted on the lower bend.This pivot also prevents any torque from reaching the swivel and its seals.The welded steel foundation will help to distribute the load from the floating pipeline to the hull of the dredge.The swivel bend is fitted with a replaceable rubber seal, which runs on a stainless steel contact surface.

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Swivel Bend

SPUD & SPUD CARRIER

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Features

LANGE spuds are fitted with pin holes for tilting as well as to secure the spud when it is not in use. The lower point is made of solid steel to ensure sufficient strength during ground penetration. When the spud is hoisted, water may escape through two holes above the lower point.

On top, a hoisting eye allows for a crane to replace the spud easily. Standard spuds are made of grade A steel, but it is possible to order other material. Optionally, the spuds may be fitted with a dividing piece, so that it can be shipped in two sections.

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A spud carrier pontoon is an extra pontoon that is attached to the spud side of the dredger and is typically hooked-up to the spud rings. It is of a similar deck height to the main pontoon but is narrower, as it only needs to carry the spud carriage and extension of the discharge pipe.

The carriage is a sturdy wagon on wheels which rides on tightly adjusted rails. One of the two spuds and its hydraulic hoist cylinder can be transferred from the dredger to the carriage, to become the working spud. The other remains in its location at the stern of the dredger, becoming the auxiliary spud.

Spud & Spud Carrier

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PIPELINE(1) Ball Joint

Ball Joint

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Parameters

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Parameters

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10 Bar 20 Bar 30 Bar Pipe ID Ball joint ID Height Width W eight Height W idth Weight Height Width W eightProduct No. [mm ] [mm ] [mm ] [mm] [kg] [mm ] [mm] [kg] [mm ] [mm] [kg]

MDRE080-BJ101 400 428 416 796 233 504 851 330 562 900 423 MDRE080-BJ102 450 478 469 893 338 564 960 470 645 1,017 625 MDRE080-BJ103 500 536 524 1,000 471 624 1,065 644 712 1,130 856 MDRE080-BJ104 550 586 561 1,088 602 681 1,168 855 774 1,237 1,120MDRE080-BJ105 600 644 621 1,192 798 744 1,277 1,117 842 1,350 1,452MDRE080-BJ106 650 694 663 1,285 1,001 798 1,379 1,408 904 1,457 1,828MDRE080-BJ107 700 744 711 1,379 1,264 853 1,479 1,742 966 1,560 2,243MDRE080-BJ108 750 804 768 1,486 1,566 928 1,593 2,257 1,049 1,687 2,848MDRE080-BJ109 800 854 812 1,576 1,846 970 1,690 2,590 1,091 1,780 3,339MDRE080-BJ110 850 904 852 1,666 2,189 1,022 1,787 3,110 1,174 1,898 4,058MDRE080-BJ111 900 954 900 1,766 2,611 1,088 1,891 3,659 1,237 2,000 4,788MDRE080-BJ112 1,000 1,066 1,004 1,964 3,583 1,207 2,106 5,039 1,362 2,220 6,480MDRE080-BJ113 1,100 1,166 1,094 2,154 4,756 1,324 2,296 6,622 1,500 2,441 8,663MDRE080-BJ114 1,200 1,266 1,167 2,328 5,943 1,426 2,496 8,548 1,644 2,680 11,584

10 Bar 20 Bar 30 Bar Pipe ID Ball joint ID Height W idth W eight Height W idth W eight Height W idth W eightProdu c t N o.

[mm ] [mm ] [mm ] [mm] [kg] [mm ] [mm] [kg] [mm ] [mm] [kg] MDR E080-BJ201 400 428 500 892 353 593 966 513 670 1,022 658 MDR E080-BJ202 450 478 557 998 495 664 1,080 733 752 1,148 942 MDR E080-BJ203 500 536 616 1,112 677 743 1,210 1,011 840 1,284 1,313MDR E080-BJ204 550 586 677 1,218 913 807 1,326 1,342 921 1,402 1,717MDR E080-BJ205 600 644 732 1,330 1,168 876 1,444 1,719 991 1,528 2,222MDR E080-BJ206 650 694 786 1,432 1,463 944 1,562 2,193 1,074 1,652 2,814MDR E080-BJ207 700 744 849 1,542 1,849 1,009 1,672 2,682 1,157 1,780 3,509MDR E080-BJ208 750 804 913 1,660 2,316 1,094 1,806 3,411 1,239 1,908 4,365MDR E080-BJ209 800 854 973 1,768 2,782 1,149 1,912 4,007 1,304 2,024 5,173MDR E080-BJ210 850 904 1,021 1,870 3,274 1,217 2,030 4,817 1,387 2,144 6,204MDR E080-BJ211 900 954 1,076 1,974 3,839 1,282 2,134 5,610 1,465 2,264 7,308MDR E080-BJ212 1,000 1,066 1,200 2,200 5,319 1,428 2,384 7,775 1,625 2,524 10 ,037MDR E080-BJ213 1,100 1,166 1,303 2,406 7,026 1,557 2,620 10 ,306 1,776 2,764 13 ,215MDR E080-BJ214 1,200 1,266 1,405 2,612 8,944 1,688 2,832 13 ,158 1,904 2,924 16 ,458

Parameters

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PIPELINE(2) HDPE Dredge Pipe

Parameters

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HDPE Pipe

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HDPE

Discharge

Pipe Material:

HDPE D. of

Pipe 0.4[Mpa] 0.6[Mpa] 0.8[Mpa] 1[Mpa] 1.25[Mpa] 1.6[Mpa] DN[mm] Thickness

of

Pipe[mm] 140 5 6 7 8 10 13 160 7 7.5 8 10 12 15 180 7 7.5 9 11 13 17 200 7.5 8 10 12 15 18 225 7.5 9 11 13 17 21 250 8 10 12 15 18 23 280 9 11 13 17 21 25 315 10 12 15 19 23 29 350 12 14 17 21 26 32 400 12 15 19 24 29 36 425 13 15 20 25 33 42 450 14 17 21 27 34 45 500 15 19 23 30 37 48 560 17 21 26 33 41 51 630 19 24 30 37 46 57 710 21 27 33 42 52

800 24 30 38 47 58

850 26 32 40 50

900 28 34 42 53

950 30 36 45 56

1000 31 38 47 59

1050 32 40 49 61

1100 33 42 51 63

1150 35 44 53 66

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PIPELINE(3) UHMWPE Dredge Pipe

ParametersParameters

UHMWPE Pipe

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O.D. 0.4MPa 0.6MPa 0.8MPa 1MPa 1.25 MPa 1.65 MPa 2.0MPa DN (mm) Thickness of Pipe[mm]

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1000 22 33

Parameters

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PIPELINE(4) Dredge Pipe Floater

Parameters

Pipe Floater

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Pipe

I.D. Thickness

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pipe Floater

I.D. Floater

O.D. Floater

Length. Hull

Thickness Net

Buoyance mm mm mm mm mm mm kg 200 6 220 500 800 7 200 285 6 300 700 1200 7 420 350 6 375 1100 1100 7 920 400 8 414 1100 1200 8 1020 414 8 430 1200 1200 8 1200 450 8 480 1300 1300 8 1500 500 10 580 1400 1550 9 2219 600 10 630 1400 1700 11 2400 650 10 680 1480 1800 11.5 2930 700 12 730 1600 1900 12 3593 750 12 780 1600 2000 13 3800 800 15 830 1800 2000 14 4800 850 15 880 1800 2200 15 5140 900 18 940 2200 2500 16 8180

Remark: 1.

2pcs per

completer

floater 2. Floaters

under

the size

of

4m(O.D.)X4m(L)

are

all

available

PIPELINE(5) Suction & discharge rubber hose pipe

ParametersParameters

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FeaturesFeaturesFeatures

As dredge hoses often operate in a professional, high-performance, customer-specific environment, product reliability and safety come first. In order to achieve this, LANGE sets and adheres to the highest standards in the industry.

Suction hoses are more strngth than discharge hoses on a same dredger. And suction hoses have a bigger inner diameter.

Suction Hose Discharge Hose

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Discharge Rubber Hose Main Material: Natural Rubber

Inner diameter Allowable error Working pressure Bursting Pressure Length Pipe Wall thickness

mm mm Mpa Mpa m mm

250 2 0.4~1.2 3.6 1-2 34-36 300 2 0.4~1.2 3.6 1-3 34-37

414 2 0.4~1.2 3.6 1-3 35-37

560 3 0.4~1.2 3.6 2-3 40-45

600 3 0.4~1.2 3.6 2-3 40-45

700 3 0.8~1.5 4.5 2-3 40-45

800 4 1.2~2.5 7.5 2-3 50-52

900 4 1.5~2.5 7.5 2-3 55-58 1000 5 2.0~2.5 7.5 3-5 75

Parameters

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PIPELINE(6) Dredge Floating Pipe

Parameters

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Self-Floating Pipe

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Inside Diameter Working Presure Burst Presure Vacuum Presure Adhesive Strength Abrasion value Bending angle

mm Mpa Mpa Kpa KN/m cm3

254 1.5 4.5 80 4 0.4 0 - 45

304 1.5 4.5 80 4 0.4 0 - 45

350 1.5 4.5 80 4 0.4 0 - 45

400 1.5 4.5 80 4 0.4 0 - 45

450 1.5 4.5 80 4 0.4 0 - 45

500 1.5 4.5 80 4 0.4 0 - 45

550 1.5 4.5 80 4 0.4 0 - 45

600 2 6 80 4 0.4 0 - 45

800 2 6 80 4 0.4 0 - 45

850 2 6 80 4 0.4 0 - 45

900 2 6 80 4 0.4 0 - 45

1000 2 6 80 4 0.4 0 - 45

1200 2 6 80 4 0.4 0 - 45

1300 2 6 80 4 0.4 0 - 45

Parameters

Universal TypeActive Type

DRAG HEAD

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Parameters

Diameter Length

Overall Length

of

Visor Width overall Width of Visor Product

No. [mm] [mm] [mm] [mm] [mm]

MDRE080-DH101 420 1300 1000 1600 1340 MDRE080-DH102 550 1525 1100 1800 1560 MDRE080-DH103 600 1560 1190 1850 1560 MDRE080-DH104 650 1900 1240 2650 2550 MDRE080-DH105 700 1935 1255 2700 2600 MDRE080-DH106 750 1950 1300 2810 2700 MDRE080-DH107 800 2000 1550 2940 2750 MDRE080-DH108 900 2350 1650 3200 2850 MDRE080-DH109 1000 2850 1760 3700 3250 MDRE080-DH110 1200 3300 1850 4240 3700

LANGE dragheads are available as Universal draghead, California draghead and Active draghead.

Universal dragheads are best suited for general use in varying soil types.

A California draghead is recommended for compact and firmly packed soil types.

Active dragheads perform especially well in densely packed fine sands which are extremely hard to excavate with otherdragheads.

The soil is loosened by pressure water jets and by cutting teeth , both arranged over the whole width of the visor. The visor carrier includes a jet water connection to the side suction pipe. Jet water nozzles are arranged in a replaceable steel beam which is mounted below the hinge line. The effect of the pressure water can be adjusted to the dredging conditions by using different sets of nozzles

GANTRIES & SWELL COMPENSATOR

Trunnion GantryIntermediate GantryDraghead Gantry

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The limits have not yet been reached.All can be furnished with multiple hydraulic cylinders and all are designed with their final purpose firmly in mind.

FeaturesFeaturesFeatures

LANGE gantries work effectively, require minimum maintenance, ensure a dependable workingenvironment and are built to last. With a hoisting capacity of 30 tonnes at an operating radius up to 6.7 metres, standard gantries are solid, highly reliable and can be delivered quickly. They are supplied fully assembled and equipped withfender, lighting and necessary lubrication lines. The on-board installation process has been simplified as far as possible.

difficult working conditions. In addition to tackling uneven seabed profiles, it compensates vertical vessel motion at the gantry of up to six metres. To achieve optimal production, every swell compensation system is set up specifically for the individual vessel, hardware and range of conditions in which it will work. It is assembled from regularly available components, ensuring it forms a reliable link inthe trailing suction installation.

has been designed to operate effectively in both average and extremelySwell Compensator

LANGE Gantries are built with a capacity greater than 300 tonnes at an operating radius of 10 metres.LANGE Gantries LANGE Gantries

Swell CompensatorSwell CompensatorSwell Compensator

LANGE Gantries

FeaturesFeaturesFeatures

Double JointSingle JointTurnning Gland

The main functions of the suction pipe are to transport the dredge mixture to the hopper, and transfer the trailing forces from the draghead to the ship. The suction pipe also ensures full control of the draghead on the sea floor. On the suction pipe there are also supports for jet water systems, hydraulic piping and cabling. The side suction system is assembled from the following main components:

Sliding PieceTrunnion BendSuction Pipe

SIDE SUCTION SYSTEM

Drag-arm

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BOTTOM DOOR & OVERFLOW

FeaturesFeaturesFeatures

Bottom Door

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Bottom discharge systems permit rapid and complete discharge of soil via the hopper bottom. The two main types are bottom doors and conical bottom valves. They are an integral part of hopper design, normally installed when a vessel is built but also as retrofit. Besides these two main types, pre-dumping doors and self-suction channel doors can also be installed in the hopper bottom.

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The overflow drains excess process water overboard. An effective overflow system induces little turbulence,allowing the mixture maximum time to settle. All overflows are designed with the needs of a specificvessel in mind. A good overflow system can significantly raise net production.

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BOW COUPLING & VALVE

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The Bow Coupling is especially suitable for use in high sea states and does not require a work boat for the

attachment of the line. The dredger can approach from any angle, reducing connection time. The flex facility

of the bow coupling also reduces loads on the line, improving operating life and reducing the need for

time-consuming repairs. All models are designed to take pipelines measuring between 450 and 1100mm

diameter, however they can be customised.

FeaturesFeatures

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ValveBow Coupling

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Valves are available with the following specifications:

Diameters from 250 to 1400mm

Low pressure (8kPa), medium pressure (15kPa) and high pressure (30kPa)

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16/F, No. 65, Jianxin North RoadJiangbei District, Chongqing China

Chongqing Lange Machinery Group Co., Ltd.

F +86-23-67698691

www.langemachinery.com

16/F, No. 65, Jianxin North RoadJiangbei District, Chongqing China

Chongqing Lange Machinery Group Co., Ltd.

F +86-23-67698691

www.langemachinery.comÌ»½¸²±´±¹§ ½®»¿¬»­ ª¿´«» Í°»½·¿´¬§ ½¿­¬­ ¾®¿²¼ marine-dredging@langemachinery.commarine-dredging@langemachinery.com

M+86-18623285013M+86-18623285013T +86-23-67698698 EXT8057T +86-23-67698698 EXT8057