TTS-4/375 Series Tensioner

4-track system

The MDL TTS-4/375 Series Tensioner is a 150Te – 4-track system for the installation or recovery of flexibles cables, umbilicals and steel pipe products.

The tracks are fitted with ‘V’ shaped pads and operate by gripping the product between the opposing track carriages with failsafe hydraulic cylinders.


8.5m x 4.5m x 5.1m (LxBxH) assembled 98Te


Operational mode
2 or 4 track mode

Track contact length

Nominal squeeze
1500Te (4 x 375Te)

Nominal squeeze/m

Nominal pull force (idler end, 4-track mode)
150Te at 0.1 CoF
125Te at 0.083 CoF
100Te at 0.66 CoF

Product speed (150Te pull)
0 - 500m/hr (at 60Hz)

Product speed (100Te)
0 - 750m/hr (at 60Hz)

Tension control
10 – 100% – provided digitally

Product Capacity

Product range
50 – 650mm

Maximum track opening
1144mm (without pads)

Ancillary Equipment

Electro-hydraulic powerpack
6.0m x 2.8m x 2.8m (LxBxH)
Weight - 20Te

Control van
3.0m x 2.3m x 2.6m (LxBxH)
Weight - 4.0Te

Spares container
3.0m x 2.2m x 2.6m (LxBxH)
Weight - 6.0Te

Spreader beam
4.06m x 0.25m x 0.67m (LxBxH)

Hose & Cable Package

20m set from powerpack to tensioner unit
20m power cable from powerpack to control van
20m power cable from powerpack to vessel

Lifting Equipment

1 x lifting rigging set for the tensioner
1 x lifting rigging set for all ancillary equipment

Design Appraisal

Up to 90%

Marine/high salinity

Power Requirements

Supply 1 (main system)
3 Phase, 440V, 60Hz, 400amp supply at full load

Additional Information

The unit is designed for mounting horizontally on a deck, inclined on a ramp or hung off vertically.

The tracks are driven by hydraulic motor/brake/gearbox drive assemblies to deploy or retrieve product.

All four track carriages are mounted on the main circular structure which is attached to either the base frame, or a vertical lay system through load cell pins which provide accurate product load information.

Two tracks pivot open providing a wide aperture to facilitate passing ends and loading or unloading product.

The unit is supplied with a dedicated dual electro-hydraulic powerpack.

Custom track pads can be supplied to suit various products.

Operates in 2 or 4 track mode. Road transportable or can be shipped by container in component form.

Supplied with quick connect/disconnect hoses.

An electric drive option with EPU is available for purchase.

Facility for data logging can be supplied.

Mdl Tts4 150Te Datasheet 01 Hd Copy Mdl Tts4 150Te Datasheet 02 Hd Copy