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Photo 13 - Liquid Helium Tank
Liquid Helium Storage
A 1500 liter liquid helium dewar stores and distributes
the liquid helium through two flow control valves
equipped with bayoneted ports The valves are a low heat
leak design utilizing springs to close and a stainless
steel pull rod to open. The liquid helium valves are
positioned with a Foxboro / Jordan Model VA-1110
electric actuator. The valve position is determined by a
4-20 ma signal from a temperature controller or liquid
level controller.
The liquid helium dewar contains liquid nitrogen
reservoir to provide coolant to a thermal shield.
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