information contained herein
is for reference only. For the most accurate drawings
please contact our Sales or Engineering team.
High Pressure Gas Filled Disposable Cylinders
1.0cc to 1000cc INTERNAL CAPACITY
Approved and in service gas
cylinder products meeting
MIL-PRF-25369, MIL-C-601G, AS601, MIL-C-16385,
USCG/UL1191, DOT 39, ASTM, FAA/TSO C13, cGMP and USP
Common Gas Filled Cylinders:
1: Quick Reference Guide: SIZING
BY CYLINDER DIAMETER
Need help with Unit Conversions? Click here
2: Sealing Cap Guide: TYPE AND
Table 3: Quick Reference
Guide: GASES, GRADES AND RELATIONSHIPS
This table is a reference guide to help you
think about the type of gas you may require. We offer virtually
any gas or blend there is; but generally, not toxic gases,
as we place the safety of our employees (and you) as a
high priority. Please contact us for detailed information
about a specific cylinder, as there are many factors that
affect the quantity and pressure of the stored gas in our
Piercing Pins and Unique
Puncture Pin Explanation
Leland is about gas technologies. The ability to put gases
into unique disposable cylinders safely and effectively is
our goal. Most of our cylinders are mass produced at rates
as high as 40 finished units per minute. It takes planning
and a commitment to the specialized equipment necessary to
make these cylinders. Here are seven examples of our cylinder
Leland brings to the design table miniaturized gas filled cartridges with an indefinite storage life. These cartridges, as small as 1" long, can have stored pressures up to 3000 psi. They are quite efficiently made and millions are kept in stock at any given time. Many types of gases can be used. Regulators and control valves are typically available for most applications. The cartridges are puncturable and when welded closed, provide an extremely reliable and unique way to store energy.
Mini Cartridges are defined as a pressure vessel with an internal water capacity less than 9cc. Filling pressures may be achieved of up to 4,000 psi under certain circumstances.
Current outside diameter is 0.375” and lengths from 1.00" to 1.77" are standard. All mini cartridges are puncturable. The pierce force is <160Nf using a 2.1mm diameter puncture pin. Although the ‘work’ curves are not shown here, they are consistent from lot to lot. Both pad printing and dot matrix printing methods have been used to mark these cylinders
Burst and Safety
The cap in this example released from water pressure of 12,000psi. (hydrostatic)
Price and Availability
The table below shows most of
the mini cartridges stocked at out South Plainfield facility.
Mass production pricing is quoted directly based on many
parameters. In most instances, samples can be procured for a
Large DOT Cylinders
Leland now offers a large range of puncture type welded closed gas filled cylinders to North America. These large cylinders begin at 86g CO2 fill and go all the way to 440g. The puncturable ends are threaded to 1/2-20UNF2A to allow use with standard life jacket style inflators. Manual and auto inflators easily puncture these cylinders
Mini-life rafts for the US Army, USCG and US Navy are just one use where a welded closed ZERO leakage gas filled cylinder is specified. Excessive G loads, shock, and harsh salt environments are the standard criteria for these DOT approved pressure vessels. Although they meet the refillable safety standards as well, the "disposable" DOT approval is an economic advantage to the OEM, allowing new and useful products to hit the streets at a lower per unit cost with the reduction of complicated valves, hydrostatic tests, etc.
Verification of gas charge is easily accomplished by weighing the cylinder and comparing the indicated weight to the actual. Welded closed cylinders are a reliable energy source, recorded periodic inspection is important as a further step to provide a statistical representation of quality to the end user.
Lighter, Stronger, More Gas
The US DOT has approved a higher filling ratio of CO2 for life raft inflation to meet the requirement of the new US Navy and USAF requirements for one and two man inflatable life rafts. The new programs will also feed the interest of the commercial and recreational fishing markets as small lightweight and affordable life rafts can go into service for many years without requiring a bottle change. The key advantage of the small life raft is that it gets the person out of the cold water which significantly increases the chance of survival. Specific data regarding the restrictions of these 75% fill ratio cylinders can be viewed here. Leland can also fill with high pressure N2 for cold applications. Recent developments in material have also lead to a thinner wall thickness, from 3.0mm down to 2.5mm. Not only is there a savings in weight, but there is the increased inside capacity as well. Operating with three diameters of large cylinders allows many opportunities to design cylinders in custom lengths to meet specific product envelopes.
Options for these cylinders include:
This entire line of gas filled cylinders meet and exceed all of the requirements of the United States Department of Transportation as: DOT 39, NRC, (Non Refillable Container)
DOT Approval Doc for 75% Filling Ratio
They are approved for all modes of transportation and are considered hazardous material when transported by ground, air, or sea. Other sizes are available as well as filling with any non toxic, non flammable gas. Some oxidizer gases cannot be welded in. Usually, we can fill to pressures up to 2750 psi max. Please call our Technical Sales Department.
These types of cylinders, welded closed, are mission specific in that they will contain 100% of the energy originally filled. Operating ranges of 0°F to 140°F are easily accomplished.
More information click here
your requirements are outside of the range of product
possibilities shown here,
please take a moment to
contact us. Our Tech Team will be happy to assist