LHe Glass Cryostats With A Construction

LHe bath cryostats (Dewar flasks) are made from DURAN borosilicate glass 3.3 in compliance with DIN/ISO 3585 and have been designed for the use of liquid helium. Glass cryostats must be designed so that they can be re-evacuated, as DURAN borosilicate glass 3.3 is not helium-tight.

The standard vacuum connection used is an NW25 glass flange with clamp and O-ring, which makes it possible to establish the connection to the vacuum pump using small flange components made from metal. Upon request, a vacuum glass tap or a glued-on metal flange can be delivered as a pump flange. The helium cryostats are only made to order.

Changes as to the dimensions, connections or volumes can usually be made at no extra charge. The LHe cryostats listed in the table correspond to the most common dimensions and volumes. The standard LHe cryostats come with opposing viewing strips. The cryostats can also be delivered with one viewing strip or fully silvered.

Technical Data

Type D.I. D.A. H.I. D.I.1 D.A.1 H.I.1 Volume
[l]
LHC 10 60 80 550 16 32 250 2,0
LHC 11 70 90 550 16 32 250 3,0
LHC 12 80 105 550 16 32 250 4,0
LHC 13 99 120 550 24 42 250 6,0
LHC 14 104 130 550 28 48 250 7,0
LHC 15 124 150 550 32 52 250 9,5
LHC 16 136 160 550 32 52 250 11,5
LHC 17 158 185 550 32 52 250 15,5
Details