L–N2 Armored Coolant Delivery Hoses

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Armored Stainless Steel L–N2 hoses are an excellent substitute for Vacuum jacketed hoses where test are run infrequently or where vacuum jacketed hoses are not in the budget.

L–N2 (Liquid Nitrogen) Armored SS Hoses

Sigma Armored Stainless Steel L–N2 hoses have the correct fittings to connect any standard L–N2 Dewar (CGA–295 fitting) to any standard Sigma temperature chamber or thermal platform. The inner core of these hoses is 1/4” I.D. convoluted superflex stainless steel with an outer braid of woven stainless steel for strength and a stainless steel armored covering. The small inner diameter of these super flexible hoses reduces the volume of L–N2 that is exposed to ambient heat influences by 75% to improve delivery of liquid phase nitrogen to the cooling process.


These hoses are small, light, and flexible, so they're easily positioned without strain on connections. Because there is no insulating layer in these hoses, they should always be used inside a thick layer of foam insulation. Sigma hoses are supplied with insulation. Note that when the hose is in use and cold, the insulation becomes rigid and unmovable until the hose warms. Armored hoses are less expensive than vacuum jacketed hoses. The external insulation of armored hoses is not as effective as the vacuum layer in a vacuum jacketed hose. Armored hoses are suitable for short hose lengths, occasional use, or when vacuum jacketed hoses are not in the budget. Every Sigma armored superflex hose is fitted with a safety pressure relief valve so that liquid trapping is not an issue.  

Sigma Superflex Armored Stainless Steel Hoses 
Length Feet Length Meters 1/4" Nom ID
Item Number		 3/8" Nom ID
Item Number		 1/2" Nom ID
Item Number
1.5 0.5 36005 37005 37055
2 0.6 36006 37006 37056
3 0.9 36008 37008 37058
4 1.2 36010 37010 37060
6 1.8 36014 37014 37064
8 2.4 36018 37018 37068
10 3.0 36022 37022 37072
12 3.7 36026 37026 37076
15 4.6 36029 37029 37079
 
Hose nominal OD 0.6" 0.9" 1"
Outlet fitting 1/4" female 
SAE flare swivel		 3/8" female 
SAE flare swivel		 1/2" female 
SAE flare swivel
Outlet fitting compatibility Sigma Standard  Available on some Sigma chambers Available on some Sigma chambers
Dewar connection CGA295 CGA295 CGA295
Lead Times Stock Item 2-4 weeks Special Order 2-4 weeks Special Order

*  Please note that most Sigma chambers and platforms are equipped with a 1/4" SAE connector. Please confirm the size of the connector on your unit before ordering hoses.

To learn more about Cryogenic Cooling, hoses, and Accessories read Sigma's
"Cryogenic Cooling for Temperature Chambers and Thermal Platforms - Explained and Demystified"

We recommend using the shortest length and smallest ID diameter hose that matches your chamber/platform, L–N2 
or L–CO2 source, and cooling needs to reduce heat absorption by the coolant in the hose.

To prevent metering valves and filter from becoming fouled by tape shards, always use Teflon paste sealant... never Teflon tape... when installing cryogenic coolant plumbing.
 

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