The Thunderbird 40 cu ft Aluminum Cylinder is the largest aluminum pony bottle available and most commonly sold. Due to the large volume divers find it to be the best choice for both stage bottles and bail-out bottles. However for the average diver the AL40 may be a bit large if you are just using it as a bail-out bottle (aka Back-up pony bottle). They are more commonly used among-st Tech divers, rescue divers or commercial divers. Equipped with the XS Scuba Pro Valve and your choice of 2 different colors the 40 cu ft pony bottle is a perfect choice for most divers in the hunt for a Bail-out bottle or Stage bottle
The Thunderbird 40 cu ft Aluminum Cylinders are made from 6061 alloy, an aluminum magnesium-silicon blend that improves durability and performance. Thunderbird Cylinders are the world's first aluminum scuba cylinders, developed in cooperation with Jacques Cousteau at their facility in Graham, North Carolina. With unmatched expertise, that legacy continues there at Thunderbird. Benefits of all that tried and tested, continued development are improved fracture toughness, resistance to tearing and cracking, corrosion-resistant interior and exteriors. The Thunderbird 40 cu ft Aluminum Cylinders are made to U.S. DOT and Transport Canada standards and every cylinder is inspected and tested by DOT- and TC- authorized independent agencies. There's no doubt to the reliability and durability with DOT and TC requirements tested in excess of 10,000 cycles at test pressures with a minimum burst pressure tested to 2.5 times service.
Service pressure of the Thunderbird 40 cu ft Aluminum Cylinder is 3000 psi / 207 bar with a try capacity of 40.0 cu ft / 5.7 liters. The empty weight of the Thunderbird 40 cu ft Aluminum Cylinder with no valve is 15.3 lbs / 6.9 kg. Outside diameter is 5.25 in / 133 mm and cylinder length with no valve is 24.6 in / 625 mm.
Buoyancy of the Thunderbird 40 cu ft Aluminum Cylinder when completely full is -0.7 lbs / -0.32 kg and gradually increases 3.2 lbs as the pressure decreases down to 500 psi with a total buoyancy of 2.5 lbs / 1.13 kg.
The Thunderbird 40 cu ft Aluminum Cylinder are cleaned for oxygen and oxygen-enriched service at the factory. If you intend to use this cylinder for oxygen or oxygen-enriched service (ie. with any gas combinations of 23.5% or more), all components with the cylinder must be oxygen compatible. It is the responsibility of the cylinder user to ensure that the cylinder and all components are maintained in proper state of oxygen cleanliness in strict accordance with regulatory requirements and industry standards.
The Thunderbird 40 cu ft Aluminum Cylinder comes in either Brushed No Coat, or Yellow.
All cylinders ship with the freshest possible hydro date. Limited in some models and colors because of high manufacturing quantities and relatively low sales volume. Please understand that aluminum cylinders within 12 month of manufacture date are considered current hydro and not subject to discount.
Every Thunderbird 40 cu ft Aluminum Cylinder comes with a XS Scuba Pro Valve allowing the use of both standard yoke or DIN. With a spin-out DIN insert the valve converts from standard yoke to 230 bar DIN Outlet. The 3/4"-14 NPSM standard inlet threads match with the Thunderbird 40 cu ft Aluminum Cylinders. The XS Scuba Pro Valve is cleaned for pre-blended Nitrox up to 40% oxygen. Equipped with the color indicating handwheel, it's easy to see whether the tank is on or off and with only a 1.5 rotation you can turn the tank fully on or fully off.
Thunderbird 40 cu ft Aluminum Cylinder Features:
Service Pressure - 3000 psi / 207 bar
True Capacity - 40.0 cu ft / 5.7 liters
Buoyancy Full - -0.7 lbs / -0.32 kg
Buoyancy at 500 psi - 2.5 lbs / 1.13 kg
Empty Weight (No Valve) - 15.3 lbs / 6.9 kg
Outside Diameter - 5.25 in / 133 mm
Cylinder Length (No Valve) - 24.6 in / 625 mm
Cylinder Oxygen Compatible up to 23.5%
Hydro Dates within 12 months considered current hydro
High-pressure tanks for more time underwater
Improved fracture toughness
Resistant to tearing and cracking
Withstands high-pressure loads over long periods
Corrosion-resistant interior, exterior
Available in a range of exterior finishes
Made to U.S. DOT and Transport Canada standards
Cylinders made from 6061 alloy
aluminum magnesium-silicon blend
world's first aluminum cylinder manufacturer
developed in cooperation with Jacques Cousteau
XS Scuba Pro Valve Features:
Standard yoke outlet
3/4”-14 NPSM standard inlet threads
Air service only
1.5 handwheel rotations from fully on to fully off
Color indicating handwheel
Thunderbird 40 cu ft Aluminum Cylinders Available Options:
Color - Brushed No Coat or Yellow
Looking for a different size pony bottle? Try these on for size.
Tanks only ship to the contiguous 48 states for the $20.00 handling charge. If you prefer to order a tank from outside of this area please give us a call as the shipping will not be the $20.00 displayed. You will have to receive a quote for shipping and order placed by phone. If ordered online we will contact you with the updated shipping costs before the order ships.