Harbor Dredger NEW

Below the main characteristics are given for the BA900 mounted on a S-type dipperbarge - Year 2014

" BA900 mounted on flexible pedestal

" Bureau Veritas Classification

" Capable to dredge in max. 2.5-m wave height

" Dimensions : 62.40 x 19.00 x 4.00 m

" Gross Tonnage 1345 

" Spud Length : 37 m

" Stabilising Spuds : 1600 x 1600 mm square built of special steel

" Hydraulic tilting spuds and heavy built Spud casing

" Dredging instrumentation in excavator's cabin.

" Deep Sea hull and high bow

" Accommodation

" Backacter's diesels at aft with water cooling and noise friendly

" 20 TON Mooring winches in Portside and Starboard Side 

" Fuel capacity  165 m³

" Fresh water capacity 72 m³

" Painting system (with impressed current system for corrosion protection)

" Safety inventory

" Self-propelled : sailing

" Additional auxiliary crane(s):

01 DSF 600: Capacity 60 Ton

01 DSF 50: Capacity 05 Ton

Equipment BA900

The BA900 can be executed with the following monobloc, stick and  bucket  combination:

Equipment:

" Boom : 16.00 meters

" Stick : 07 and 10.00 meters.

" Bucket : 10 m³ SAE; 13 m³ SAE and 18 m³ SAE

" Max. Working depth: 21.50 meters approx.

" Penetration capacity on max depth : 100 tons approx.

General Technical Characteristics BA900

" 1 x 1900 kW (1 x "Cummins", QSK 60-M), plus 1 x 310 kW (QSK 11 D-M) installed

" Max. oil flow per minute : 7200 lpm

" Max. pressure : 320 bar

" Fuel consumption (approx. at 100% load) : 540 l/h approx for 2 diesels

" Estimated weight of "Backacter" on deck : 360 tons

" Hydraulic boom cylinders dimensions : 460 mm / 300 mm

" Stick cylinders dimensions : 340 mm / 240 mm

" Bucket cylinders dimensions : 280 mm / 180 mm (short + long stick)

" Forged connection eyes at rods will be applied. (mono and stick cylinders)

" All cylinders have hydraulic "damping".

" Large operation cabin.

" Automatic greasing on slewing ring and on the dredging equipment, except bucket

" Connections. In total 3 automatic greasing systems are present.

" Monobloc and stick can be switched in Hydraulic-bypass. (floating position).

" Diameter slewing ring : 4400 mm (triple roller type)

" Height of slewing teeth : 500 mm

" Slewing gears : 4

" Like all "Backacter's", the main hydraulic tank is non-pressurized, thus enhancing Hydraulic-pump and eliminating air bubbles. Water cooled hydraulic system.

" The hydraulic system is water cooled!

Hydraulic Installation BA900

Specification of the main features of the hydraulic installation of the "Backacter 900".

" Power pack : 1 x 1900 kW diesel and 1x 310 kW diesel

" Main pumps : Four double variable displacement, axial piston pumps.

(make : Rexroth) Pressure : 320 bar

Capacity each : 1440 lpm

Four variable displacement, axial piston pumps.

Pressure : 320 bar

Capacity each : 320 lpm

total capacity : 7000 lpm

" Hydraulic oil reservoir capacity : 12000 litres. (above deck tank)

" Filtering in hydraulic line : Full flow return line filtering at 10 m?

" Full flow leak oil filtering at 3 m?

" Full flow filters at 200 m? in each pump

" By-pass filtering at 1 m?

" Rotary joint : Large capacity swivel with 4 pressure

paths 1760lpm at 320 bar.

One return line path 10000lpm at 25 bar.

One through hole Ø54 mm for E-cabling.

" Piping : above deck: executed in high strength stainless

steel or duplex.

below deck: executed in carbon steel S355.

" Controls : Proportional electronic control of all valves and

pump outputs.