Proven Reliability In the Oil Well
Logging and Geothermal Industries
Since 1960

PYROFLASK high temperature Dewars
provide optimum thermal performance
for protection of critical downhole
electronics. Every PYROFLASK
provides effective thermal
insulation at temperatures up to
600° F. Vacuum Barrier’s PYROFLASKS
are available in a wide range of diameters
and lengths, or custom built to your
specific size, interface, and performance