Uniweld
Uniweld N40 Empty Nitrogen Cylinder 40 cu ft CGA 580 22.5 in
Empty, refillable nitrogen cylinder holding 40 cu ft at 22.5 in height with CGA 580 valve and DOT 3AA 2015 rating
- TypeWelding Parts & Supplies
- Ready to refill for repeated nitrogen supply
- DOT 3AA 2015 certified for transport safety
- CGA 580 valve fits standard nitrogen regulators
- 40 cu ft capacity suits medium-duration jobs
- 32 lb empty weight allows manageable handling
40 cu ft Nitrogen Cylinder
The Uniweld N40 is an empty, refillable cylinder designed to hold nitrogen for welding and HVAC applications. It arrives ready for initial filling and carries DOT3AA2015 certification for transport safety. The cylinder weighs 32 lb empty and stands 22.5 in tall.
CGA 580 Connection Limits
The CGA 580 valve outlet is the standard for inert gases such as nitrogen and argon, so regulators and hoses must match this thread. The cylinder is rated for a 2015 psi service pressure; exceeding that pressure or using an incompatible gas voids the DOT approval. Only nitrogen should be filled into this vessel.
40 cu ft Capacity Decides Fit
The 40 cu ft internal volume determines how long a nitrogen supply lasts during pressure testing, brazing or purging tasks. Buyers who need longer run times between refills should choose a larger cylinder. This size suits mobile service work where a 32 lb empty weight remains manageable.
Highlights
- Ready to refill for repeated nitrogen supply
- DOT 3AA 2015 certified for transport safety
- CGA 580 valve fits standard nitrogen regulators
- 40 cu ft capacity suits medium-duration jobs
- 32 lb empty weight allows manageable handling
Specifications
| Brand | UNIWELD |
|---|---|
| Type | Welding Parts & Supplies |
Questions about this item
Is the 40 cu ft capacity the right size for my nitrogen welding jobs?
The cylinder holds 40 cubic feet of nitrogen when filled, a common volume for light fabrication and HVAC purging tasks.
What does the 32 lb empty weight mean when I move the cylinder around the shop?
At 32 pounds empty, the steel cylinder is manageable by hand for short carries but a cart is recommended for longer distances.
Will the CGA 580 valve work with my existing nitrogen regulator?
CGA 580 is the standard nitrogen outlet in North America, so most nitrogen regulators connect directly without an adapter.
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