IHC Beaver 7525 C Cutter Suction Dredger

The IHC Beaver 7525C is a mono hull dredger based on the latest and proven technology from the standardisedBeaver range. The dredger features:- use of high efficiency dredge pumps;- two dredgepumps, (one submerged single walled, one on-board double walled) of the same type, using identical wearparts for each of the pumps (impeller, pump casing, wear plates);- diesel direct-driven submerged pump through pivoting gearbox;- engine room and on-board pump at main deck level for easy access;- so called “white iron” highly wear resistant wear parts for the dredge pumps;- separate accommodation unit placed on vibration dampers forimproved comfort for crew.

This type is designated the IHC Beaver 7525 C.75 – diameter of the delivery pipeline is 750mm25 – max. dredging depth is 25 metresC – dredger is equipped with a cutter

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IHC Beaver 7525 C – Cutter Suction Dredger

Principal particularsLength overall, ladder raised 71.50mLength over pontoons 53.90mBreadth 14.00mDepth 3.40mMean draught with full bunkers 2.00mMaximum standard dredging depth 25.00mInternal diameter of suction tube 750mmInternal diameter of discharge pipes 750mmTotal installed power 4,958kW Dredge pumps Submerged pump HRMD 141-30-70 single walledPower of pump drive 1,640kWDredge pump driven via pivoting gearboxInboard pump HRMD 141-30-70 double walledPower of pump drive 1,640kWDredge pump driven through combined pump block/reduction gearboxBall clearance of pumps 299mm

Auxiliary power (cutter, winches, spuds)Cummins KTA50-D developing 1,291 kW (1,755hp) continuous power at 1,800rpm

Electrical installation Board network diesel generator setCummins engine QSM11-D, prime power 265kWHarbour diesel generator setVoltage (50Hz) 3x400V AC Cutter Type 30-CB-ACR-2220-750Power at shaft 750kWDiameter 2,220mmMaximum speed (approx.) 30rev/min Winches (ladder winch / swing winches) line pull, 1st layer 320 / 320kNMax. line speed 20 / 20m/minWire diameter 44mmDrum diameter 960mmSwing wires 200mAnchor weight 2,000kg

Spuds Length 36.50mDiameter 1,200mmWeight 30,000kg

Spud hoisting rams Ram stroke 4.00m Swing width with 35° swing angle at max. dredging depth 58mat min. dredging depth 72m Deck crane Lifting power 50kNOutreach 9.50m

Classification Bureau Veritas Class I, X Hull dredger - no propulsion with notation ‘Coastal Area’ Engine installation after construction

Equipped withSpud carriage installationAnchor boomsSwivel bendVacuum relief valveProduction measuring equipmentAccommodation for 20 persons

Output calculated for:

Soil type Decisive grain size Situ densityA fine sand 100µm 1,900kg/m3

B medium sand 235µm 1,950kg/m3

C coarse sand 440µm 2,000kg/m3

D coarse sand + gravel 1.30mm 2,100kg/m3

E gravel 7.00mm 2,200kg/m3

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IHC Holland B.V.

P.O. Box 204, 3360 AE Sliedrecht Molendijk 94, 3361 EP SliedrechtThe Netherlands

T +31 184 41 15 55F +31 184 41 18 84info@ihcmerwede.comwww.ihcmerwede.com

Internal diameter of discharge pipeline 750mmDredging depth 25mMaximum volumetric concentration of in situsolids of 30%Final elevation at end of pipeline 4m

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