Insulon Vacuum Jacketed Hose, Low Pressure, Standard, 3/4″ ID

Description

Insulon Vacuum Jacketed Hose — 3/4″ ID, Low Pressure, Standard Vacuum. Inner bore: 316/316L stainless steel, fully annealed corrugated tube. Outer diameter: 1.62″. Minimum static bend radius (static installations): 6.15 in.

Standard vacuum insulation maintains a high-vacuum annulus between the inner corrugated bore tube and the outer jacket, eliminating convection and conduction heat transfer. Delivers exceptional thermal performance in the most compact, low-profile form factor available in the Insulon hose product line. Recommended for: most cryogenic transfer applications, chiller fluids to -80°C, transient cryogenic flow (seconds/minutes), liquid CO2, and applications where minimal outer diameter is required.

Low Pressure Insulon hose rated to 43 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). 316/316L stainless steel resists 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: optional PTFE, PFA, or FEP fluoropolymer liner available — wetted surface becomes chemically inert for broad compatibility

Not compatible with cryo-compressed hydrogen (CcH2). CcH2 operates at pressures exceeding the MAWP of all standard Insulon hose variants. Contact Concept Group for a custom solution. If system pressure at operating temperature exceeds MAWP, apply the derating table below or contact engineering.

Insulon Hose Maximum Allowable Working Pressure (MAWP) by Fluid Temperature — 3/4″ 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). All assemblies are pressure tested at 1.5× MAWP per NAHAD Corrugated Metal Hose Assembly Specification Guidelines.

Insulon Hose Construction and Custom Ordering Options

• Inner bore: 316/316L SS, fully annealed corrugated tube. Tube stub OD: 0.750″
• Outer diameter: 1.62″. Minimum static bend radius: 6.15 in. Contact Concept Group for dynamic bend radius requirements in flexing/moving applications.
• Optional fluoropolymer liner: PTFE, PFA, or FEP
• Optional outer braid for abrasion resistance (increases OD)
• End fittings specified at order: NPT (male/female), compression, VCR/VCO, flanges (CF/ISO-KF/ANSI), tri-clamp/sanitary, flared swivel nuts (CGA/JIC/AN), custom
• Hose length: 1.5 ft – 65 ft overall including end fittings. Tolerance: ±1.5″ for lengths ≤48″; ±3% for lengths >48″
• ASTM G93 Level A oxygen cleaning available on request
• Pressure test certificate available on request
• 100% functionally tested. ISO 9001:2015. Made to order in the USA. ~3 weeks ARO.