Insulon Vacuum Jacketed Hose, Low Pressure, MLI, 3/8″ ID
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Estimated Lead Time: 3 weeks ARO
3/8″ ID vacuum jacketed hose engineered with Concept Group’s proprietary Insulon® technology.
- MLI (multi-layer insulation) blocks convection, conduction, and radiation heat transfer for maximum thermal insulation performance. Recommended for cryogens at the lowest temperatures (LHe, LH2) and continuous cryogenic flow where radiation heat gain is significant.
- Available in lengths up to 65 feet.
- Rated operating temperature: -270°C to 815°C (-454°F to 1,500°F).
- Low Pressure: rated to 72 psi at room temperature (≤100°F / 38°C). MAWP decreases at elevated fluid temperatures; see derating table in product description.
- Wetted surface material: 316/316L stainless steel.
- All Insulon hoses ship with tube stub ends as default. Option to add end fittings; see below.
Description
Insulon Vacuum Jacketed Hose, Low Pressure, MLI, 3/8″ ID.
MLI variants add proprietary high-density multi-layer insulation inside the vacuum annulus, blocking all three modes of heat transfer: convection, conduction, and radiation. MLI increases outer diameter and minimum bend radius compared to Standard variants but does not affect pressure ratings or operating temperature range. Recommended for: cryogens at the lowest temperatures (LHe, LH2), continuous cryogenic flow (hours/days), chiller fluids below -80°C, or any application where radiation heat gain is significant.
Low Pressure Insulon hose rated to 72 psi at RT (≤100°F / 38°C). MAWP decreases as fluid temperature increases above 100°F; see derating table below. Typical applications: chiller supply/return lines, LN2 transfer with transient flow, liquid CO2 service, low-pressure process gas lines.
Compatible Fluids for Insulon Vacuum Jacketed Hose
- Cryogenic liquids: liquid nitrogen (LN2), liquid helium (LHe), liquid argon (LAr), liquid oxygen (LOX), liquid natural gas / liquid methane (LNG / LCH4), liquid CO2
- Hydrogen: liquid hydrogen (LH2) and gaseous hydrogen (GH2). Fully annealed materials resist hydrogen embrittlement.
- Thermal fluids and coolants: glycol/water mixtures, Syltherm 800, Syltherm XLT, Dowtherm Q, Dowtherm J, other synthetic heat transfer fluids, cryo-chiller fluids
- High-temperature fluids: steam, hot air, exhaust gases, process heating oils
- Specialty and process gases: GN2, GHe, GAr; semiconductor precursor, carrier, and deposition gases
- Corrosive media: add a fluoropolymer liner (PTFE, PFA, FEP) for broad compatibility with corrosive process fluids
If system pressure at operating temperature exceeds MAWP, contact Concept Group engineering.
Insulon Hose MAWP by Fluid Temperature, 3/8″ ID, Low Pressure
MAWP is constant from cryogenic temperatures through room temperature (≤100°F / 38°C). For fluid temperatures above 100°F, use the derating table below. Round UP to the next 100°F row for conservatism (e.g., a 320°F system uses the 400°F row).
| Max Fluid Temp (°C) | Max Fluid Temp (°F) | MAWP (psi), 3/8″ ID |
|---|---|---|
| 38 | 100 | 72 |
| 93 | 200 | 65 |
| 149 | 300 | 61 |
| 204 | 400 | 56 |
| 260 | 500 | 55 |
| 316 | 600 | 54 |
| 371 | 700 | 53 |
| 427 | 800 | 52 |
| 482 | 900 | 48 |
| 538 | 1000 | 33 |
| 593 | 1100 | 21 |
| 649 | 1200 | 13 |
| 704 | 1300 | 9 |
| 760 | 1400 | 4 |
| 816 | 1500 | 3 |
Optional Add-Ons
- End fittings: Options include but are not limited to Compression Adapters (BSPT, NPT); Compression Reducers; Compression Unions (Straight, Elbow 45-deg, Elbow 90-deg, Tees); Flanges (ANSI, CF, KF, QF); Flared Swivel Nuts (CGA-295 Brass, CGA-295 Stainless Steel, JIC 37-deg, Precision AN 37-deg, SAE 45-deg); Metric (M16x1, M24x1.5, M30x1.5, M38x1.5); Tri-Clamp; VCR; and more.
- Add fluoropolymer liner (PTFE, PFA, FEP) for applications that require a smooth internal bore and/or non-metallic wetted surfaces
- Add outer braid for rugged applications that require additional protection against abrasion
- Pressure test certificates available as add-on
- Oxygen cleanliness certificates available as add-on
Technical Specifications
| Bore Type | Corrugated |
|---|---|
| End Fittings | Tube stubs (default) |
| Hose Inner Diameter (ID) | |
| Hose Operating Temperature (°C) | -270°C to 815°C |
| Hose Operating Temperature (°F) | -454°F to 1500°F |
| Lengths | 1.5 – 66 feet (0.5 to 20 meters) |
| Maximum Allowable Working Pressure (MAWP) at Room Temperature | |
| Minimum Bend Radius, Static | 6.15 in. |
| Outer Diameter (OD) | 1.62" |
| Performance Level | |
| Pressure | |
| Tube Stub OD | 0.375" |
| Wetted Surface Material | 316 stainless steel |
| Manufacturer | Concept Group LLC |
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- Are end fittings already attached to Insulon® Hoses?
Depending on the type of end fitting selected, the fitting will either be installed on the hose before shipment or will be delivered in-box.
End fittings that are installed before shipment:
- CGA-295 Brass
- JIC swivel nuts
- Other flared end fittings
- Flanges
End fittings that are shipped in-box:
- Compression unions
- Compression adapters (NPT, BSPT, etc.)
End fittings are an optional add-on. Insulon Hose may be ordered without end fittings, in which case they will be delivered with fully-weldable 316 stainless steel tube stubs.
- Are bulk discounts available?
Yes, bulk discounts are available for qualifying orders. Request a quote →
- Can Insulon® vacuum jacketed hoses be ordered in longer sections and cut to length?No, Insulon® Vacuum Jacketed Hoses cannot be cut to length after delivery. They must be ordered in the appropriate size for installation. Insulon® Vacuum Jacketed Hose are available in lengths up to 65 feet. Multiple sections of hose can be joined with compression unions to achieve runs longer than 65 feet.
- Who manufactures Insulon® Vacuum Jacketed Hose?
Concept Group LLC is the sole and proprietary manufacturer of Insulon® Vacuum Jacketed Hose. Customers may purchase Insulon® Vacuum Jacketed Hose directly from Concept Group LLC, or through one of our sales partners.
- Does adding an outer braid to Insulon Vacuum Jacketed Hose affect the pressure rating?No, adding an outer braid does not affect the pressure rating. Insulon Vacuum Jacketed Hose include the option to add an outer braid to provide additional protection against abrasion. For example, in an application where the hose will be repeatedly dragged across a concrete floor, adding an outer braid is recommended.
- Does Standard or MLI affect the pressure rating?
The maximum allowable working pressure (MAWP) guidelines for Standard and MLI hoses are exactly the same. Only the pressure specification (Low Pressure or High Pressure) affects the pressure rating.
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