Underwater Open Bottom Lift Bags

Q: What are open bottom lift bags used for?

Open bottom lift bags are used for lifting objects from deeper water where controlled air expansion is required. Open bottom lift bags, often called parachute lift bags, are designed for underwater lifting operations where air expands significantly during ascent. Their open design allows excess air to vent naturally, making them ideal for deep-water salvage, recovery, and offshore construction work.

Q: How do open bottom lift bags work?

Open bottom lift bags work by trapping air inside the bag while allowing excess air to escape as it expands during ascent. Air is introduced into the bag from below, where it is captured to create buoyancy. As the load rises and pressure decreases, the expanding air vents out through the open bottom. This helps maintain a more controlled lift in deeper water.

Q: Why are open bottom lift bags preferred for deep water lifting?

They are preferred because they safely manage air expansion during ascent. At greater depths, compressed air expands rapidly as it rises. Open bottom lift bags allow this expansion to vent naturally, reducing the risk of over inflation and improving control during lifting operations. This makes them well-suited for deeper underwater recovery work.

Q: Are open bottom lift bags suitable for large or heavy loads?

Yes, open bottom lift bags are commonly used for large and heavy underwater lifting operations. Their design allows them to handle significant lifting capacities, especially in deep-water environments. Multiple bags can be used together to distribute weight and maintain control when lifting large or irregular loads.

Q: What is the difference between open bottom lift bags and enclosed lift bags?

Open bottom lift bags vent air during ascent, while enclosed lift bags retain air for more controlled buoyancy and lifting. Open bottom lift bags are designed for dynamic lifting where air expansion must be managed. Enclosed lift bags provide more stable, controlled buoyancy and are typically used in shallower or more controlled underwater environments.

Q: What safety factors should be considered when using Open Bottom Lift Bags?

Use an appropriate design and rigging safety factor, inspect the bag and hardware before use, control inflation, keep personnel clear of the load path, and follow the manufacturer's instructions for inflation pressure, attachment, and capacity.

Q: Can Open Bottom Lift Bags be rented?

Some open bottom lift bags are available for rent from RTO. Rental availability depends on size and model, so confirm the required capacity, accessories, delivery lead time, and return requirements before scheduling the work.

Open Bottom Lift Bags

joint zone lift bags are the industry standard

Model (Click Below)	Brand	Lift Capacity (lb/kg)	Diameter (in/cm)	Overall Height (in/cm)	Weight (lb/kg)	Purchase Price	Rental Rates (Day/Week/Month)
CB-25	Carter	25 / 11	15 / 6	20 / 8	1 / .5	$36.72	Sale Only
CB-50	Carter	50 / 23	18 / 7	25 / 10	1 / .5	$68.00	Sale Only
CB-100	Carter	100 / 45	25 / 10	28 / 11	2 / 1	$81.60	Sale Only
CB-200	Carter	200 / 91	32 / 13	30 / 12	3 / 1.5	$122.40	Sale Only
CB-500	Carter	500 / 227	30 / 12	56 / 22	10 / 4.5	$340.00	Sale Only

CB-1000	Carter	1000 / 454	56 / 22	50 / 20	17 / 8	$503.20	Sale Only
OPB-1100	Joint Zone	1100 / 500	47 / 120	67 / 170	11 / 4.8	$1,204.35	Sale Only
CB-2000	Carter	2000 / 907	52 / 20	86 / 34	23 / 10.5	$693.60	Sale Only
OPB-2200	Joint Zone	2200 / 1000	63 / 160	75 / 190	22 / 10	$1,390.11	Sale Only

OPB-4400	Joint Zone	4410 / 2000	71 / 180	98 / 250	49 / 22	$1,634.69	Sale Only
CB-5000	Carter	5000 / 2268	86 / 34	94 / 37	45 / 20.5	$1,496.00	Sale Only
OPB-6600	Joint Zone	6600 / 3000	79 / 200	126 / 320	68 / 31	$2,024.79	Sale Only

OPB-11000	Joint Zone	11020 / 5000	78 / 198	148 / 376	82 / 37	$2,772.47	Sale Only
CB-12000	Carter	12000 / 5443	96 / 38	136 / 54	90 / 41	$2,448.00	Sale Only
OPB-22000	Joint Zone	22050 / 10000	98 / 250	174 / 442	163 / 74	$4,879.29	Sale Only
OPB-33000	Joint Zone	33070 / 15000	115 / 291	207 / 527	238 / 108	$6,969.09	Sale Only

Joint Zone OPB-1100 Open Bottom Parachute (Lifts 1100 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 141460

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$1,204.35
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Joint Zone OPB-2200 Open Bottom Parachute (Lifts 2200 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 141461

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$1,390.11
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Joint Zone OPB-4400 Open Bottom Parachute (Lifts 4410 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 141462

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$1,634.69
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Joint Zone OPB-6600 Open Bottom Parachute (Lifts 6610 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 141463

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$2,024.79
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Joint Zone OPB-11000 Open Bottom Parachute (Lifts 11020 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 141464

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$2,772.47
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Joint Zone OPB-22000 Open Bottom Parachute (Lifts 22050 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 141465

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$4,879.29
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Joint Zone OPB-33000 Open Bottom Parachute (Lifts 33070 lbs)
SHIPS: Call for Availability
PRODUCT CODE: 142716

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$6,969.09
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Carter CB-25 Open Bottom Lift Bags (Lifts 25 lbs)
SHIPS: Normally Ships in 1-5 Business Days
PRODUCT CODE: 142948

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$36.72
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Carter CB-50 Open Bottom Lift Bags (Lifts 50 lbs)
SHIPS: Normally Ships in 1-5 Business Days
PRODUCT CODE: 142949

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$68.00
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Carter CB-100 Open Bottom Lift Bags (Lifts 100 lbs)
SHIPS: Normally Ships in 1-5 Business Days
PRODUCT CODE: 142950

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$81.60
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Category Questions

What are open bottom lift bags used for?

How do open bottom lift bags work?

Why are open bottom lift bags preferred for deep water lifting?

Are open bottom lift bags suitable for large or heavy loads?

What is the difference between open bottom lift bags and enclosed lift bags?

What safety factors should be considered when using Open Bottom Lift Bags?

Can Open Bottom Lift Bags be rented?

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