Insulon® Vacuum Insulation Components may feature high temperature multi layer insulation wrapped inside the vacuum annulus. While all Insulon® parts reduce heat transfer due to convection, these advanced models also reduce heat transfer due to radiation. Like all of our parts, these radiation-reducing components are effective in environments up to 1000°C. Our parts are available in variety of cylindrical or elliptical shapes, including tubes, cans, containers, and flasks.
What is MLI?
You have probably seen images of spacecraft and satellites soaring through outer space while wrapped in silver or gold foil. This super shiny, highly reflective material is called multi layer insulation (MLI).
Multi layer insulation is composed of multiple layers of thin, reflective material, and is used to reduce radiative heat transfer. While very effective radiant barriers, these layers often include materials with high thermal conductivity. Due to the presence of conductive materials, MLI is most effective in high vacuum environments. It is an ideal insulator in outer space, where radiation is abundant and convection and conduction are virtually nonexistent.
High Vacuum with Multi Layer Insulation
Vacuum insulated tubing and piping (VIT/VIP) reduce heat transfer due to convection and conduction. The annular space between two concentric tubes is evacuated, and this space provides a layer of thermal insulation. Higher vacuum levels lead to increased thermal performance. However, even with a near-perfect vacuum, radiation can still penetrate the space.
Some applications require enhanced thermal performance beyond preventing heat transfer due to convection and conduction. For applications seeking to reduce additional heat transfer due to radiation, MLI can be a useful insulation material.
MLI can be installed inside the annular space in order to limit radiation. The annulus is an ideal environment for MLI, which works best in high vacuum environments. Advanced models of Insulon® have MLI installed in this region. The MLI can be wrapped around the outside of the inner tube or the inside of the outer tube.
Is All Vacuum Insulation the Same?
Concept Group manufactures high performance vacuum insulation based on our proprietary Insulon® Technology, which provides unique benefits. Our technology excels in areas including overall wall thickness, durability, and operating temperature range.
High Temperature Capabilities
Insulon® has high maximum operating temperatures. Insulon® is effective at temperatures up to 1000°C, or higher, depending on material selection. Standard parts are made with stainless steel. Higher temperature materials such as Inconel, titanium, and other alloys may be used depending on application requirements.
Durable & Long Lasting
One feature that sets it apart from many vacuum insulation systems is that Insulon® does not require pump down maintenance. It is reliable, durable, and very long lasting. Long term performance helps support life cycle optimization of your insulation system.
Ultra Thin, Low Profile
Insulon® is very thin. Overall wall thickness is measured in millimeters or less.
High Temperature Vacuum Insulation with MLI
Concept Group is not the first to wrap MLI into VIT, but such systems have traditionally been limited to cryogenic applications. When taking to higher temperatures, many systems encounter issues that require the vacuums to be pumped down. Insulon® Technology does not require pump downs, even when taken to high temperatures. Insulon® has a wide operating range, allowing applications to incorporate high temperature multi layer insulation into their design.
Insulon® components are available in a variety of cylindrical geometries including straight or flexible tubes, pipes, cans, containers, and dewar flasks.