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Underwater Technology Services (s) Pte Ltd.

35 Pioneer Road, Unit J7Singapore 628503Telephone: +65 6 861 8006Facsimile : +65 6 863 2865Enquiries@underwatertechnologyservices.com

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40Te TENSIONER

This tensioner comprises of 4 track units each hydraulically driven through an epi-cyclic track gearbox and bent axial piston hydraulicmotor. Standard lubricated Berco track chains are employed on to which are bolted V profile h ard wearing polyurethane track pads.

The lower track unit and one side unit is hydraulically positioned to suit the product diameter using linear encoders to ensure accurateposition. The top track and other side track are also hydraulically positioned against the product initially at low load, then simultane-ously pressurized to the desired grip load. Hydraulic accumulators ensure the load is continuously applied providing back up in emer-gency.

To allow the product to be removed from the tensioner in mid line, or where end terminations are too large to pass through the ten-sioner, the top track opens by hinging to one side. The unique method employed to do this maintains the opening track within thetensioner width thereby minimizing deck space requirements.

A dual Hydraulic Power Unit (HPU) powers the tensioner. Two electric motors are each combined with a dual pump, the main load-sensing pump being for the track drives and a piggyback load sensing pump for the grip circuit and ancillary functions. Control of thetensioner is through a PLC and HMI. The HMI is used for calibration purposes and for setting particular parameters. The PLC moni-tors the complete system from track position settings, to latch cylinder open/close, grip pressure, HPU oil levels and temperatures etcand allows the tensioner to operate only when in the correct status.

Tensioner Specifications

Description Value

Pull Force 40 Te Outboard from idler endPull Force from gearbox end 20 Te Outboard from gearbox endTrack contact length 3 mCoefficient of Friction (Assumed) = 0.09Number of Tracks 4Track Grip Force @ Assumed Value 111.1 Te/Track @ 220 barMax Track Grip Force ( Emergency Hand Pump) 125 Te @ 254 barMaximum Designed Speed @ Max Pull Force 1000 m/hour PAY OUTMaximum Designed Speed @ Max Pull Force 650 m/hour PAY INHeight Floor to Centre of Tracks 1646mmTrack Opening 678 mm nominalMax/Min Cable diameter Pad Type BSO11-19 242.9 mm to 365.3 mmMax/Min Cable diameter Pad Type BSO11-29 114 mm to 178 mmTensioner Weight 30 Te

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HPU SPECIFICATIONS

Power rating 2 x 75 kWVoltage 380 415 voltsMax full load current 2 x 130 ampsFrequency 50HzMain Drive Pump Flow x 2 200L/min max, 100 L/min @ max pressure

Main Drive Pump pressure Max 300 bar, min 30 barAuxiliary pump Flow x 2 60 L/minAuxiliary pump pressure Max 210 bar, min 30 barGross weight 5000kgWATER/OIL COOLERRequired water flow - Saltwater

220 L/min max

STORE AND CONTROL VAN

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