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ROV Release Shackles

ROV Release Shackles

Lifting Gear Direct can supply a range of special shackles which have been developed for sub-sea use with a remotely operated vehicle (ROV) hence the name ROV release shackles. Our range is the green pin variety so you can be assured of good quality subsea shackles. Ideal for use with our sub-sea chain hoist.

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The design of these ROV shackles enables the hydraulic arm on the ROV to manipulate and release the shackles as necessary whilst under water, a task which prior to the development of these shackles had to be undertaken by a diver.

ROV release shackles are finished with a special, bright white coating so that they are easier to identify in areas with poor visibility. The pin is the standard green colour and all components are galvanized prior to adding the coloured finishes.

These specialist shackles have numerous design features including the groove on the round pin head for attaching to the shackle body so the pin cannot be detached and lost. There is also an eye mounted to the pin head to facilitate the attachment of the securing device or a monkey’s fist for example. They can all be used safely within the temperature range of -40 degrees up to +200 degrees c.

Due to the nature of these shackles and that each user has their own rules for connecting safety pins and accessories we will supply the stated components only, it is up to the customer to assemble them.

We offer three variations of the ROV release shackles – with spring pins, with locking clamps and with spring loading. All are manufactured from Grade 8 alloy steel with the quench and tempering technique applied.

ROV Release Shackle with Spring Pins

This variation incorporates two spring pins which act as its securing tool; it is feasible to attach the 2 safety pins to facilitate a single grab with the ROV. This shackle is to be used in perpendicular / inline loading only.  It is the user’s responsibility for attaching safety pins with wire ropes, loops and/or monkey’s fists; supplied as standard are the shackle body, pin and 2 spring pins. These are available in working load limits up to 85 tonne. See tables below for more specifications and dimensions.

ROV release Shackles with Locking Clamp

These subsea shackles are ideal for multi-leg slinging operations and also if there is a risk of side loading, though the WLL will be reduced by 50%. The special locking clamp takes the place of the usual nut; as there is no thread in the pin, screwing in is not needed, the clamp simply locks the pin into place and the spring pin double secures. We supply the shackle body, pin and locking clamp with spring pin, it is the user’s responsibility to assemble and attach the clamp with wire.

The safety factors differ with this type;  for WLL up to 85 tonne it is 6:1 – MBL = 6 x WLL; with models of 120 tonnes and over the safety factor is 5:1 – MBL= 5 x WLL. We can supply these shackles with working load limits up to 250 tonne.

ROV Release Shackle with Spring Release

This shackle is for in-line loading only. It is a semi-automatic shackle with a double safety device which will avoid unintentional releasing of the load. Connecting the safety pins to facilitate a single grab with the ROV is possible. The use of this ROV spring loaded shackle can considerably reduce operational times.  For sizes from 42.5 tonne and upwards this ROV shackle will be assembled with rope slings and monkey’s fist; a special tensioner tool is needed to assemble the shackle. Available up to 150 tonne working load limits.

ROV Release Shackle with Spring Pin

WLL Dia Bow Dia Pin Dia Eye Width Eye Width Inside Length Inside Width Bow Length Dia Weight Each  
tons a mm b mm c mm d mm e mm f mm g mm h mm k mm kg ROV release shackle spring pins
17 38 42 88 38 60 146 99 249 6.5 8.19
25 45 50 103 45 74 178 126 300 8.5 14.22
55 65 70 145 65 105 260 180 433 8.5 39.59
85 75 83 162 73 127 329 190 527 8.5 62

ROV Release Shackles with Locking Clamp

WLL Dia Bow Dia Pin Dia Eye Width Eye Width Inside Length Inside Width Bow Length Width Locking Clamp Weight Each  
tons a mm b mm c mm d mm e mm f mm g mm h mm k mm kg rov release shackle with locking clamp
6.5 22 25 52 22 36 83 58 164 45 2.27
9.5 28 32 66 28 47 108 75 200 48 4.25
12 32 35 72 32 51 115 83 213 48 5.36
17 38 42 88 38 60 146 99 266 48 9.27
25 45 50 103 45 74 178 126 309 48 14.62
35 50 57 116 50 83 197 138 350 48 20.75
42.5 57 65 130 57 95 222 160 377 48 28.33
55 65 70 145 65 105 260 180 440 48 41
85 75 83 162 75 127 329 190 527 48 61
120 95 95 208 91 147 400 238 647 60 110
150 105 108 238 102 169 410 275 688 60 160
200 120 130 279 113 179 513 290 838 60 235
250 130 140 299 118 205 554 305 904 60 285

ROV Release Shackle with Spring Loading

WLL Dia Bow Dia Pin Dia Eye Width Eye Width Inside Length Inside Width Bow Length Length Bolt Weight Each  
tons a mm b mm c mm d mm e mm f mm g mm h mm i mm kg rov release shackle with spring loading
12 32 35 72 32 51 115 83 201 262 6
13.5 35 38 80 35 57 133 92 227 275 7
17 38 42 88 38 60 146 99 249 330 14
25 45 50 103 45 74 178 126 300 352 16
35 50 57 116 50 83 197 138 334 373 21
42.5 57 65 130 57 95 222 160 377 442 32
55 65 70 145 65 105 260 180 433 470 43
85 75 83 162 73 127 329 190 527 579 71
120 95 95 208 91 147 399 238 646 674 131
150 105 108 238 102 169 410 275 688 699 171
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