LHe cryostats with head flange

LHe bath cryostats (Dewar flasks) are made of borosilicate glass 3.3 in accordance with DIN/ISO 3585 (DURAN) and are designed for use with liquid helium.
As borosilicate glass 3.3 (DURAN) is not helium diffusion-tight, glass cryostats must be designed in such a way that they can be post-evacuated. A glass flange NW 25 with associated clamp and O-ring is used as a standard vacuum connection, so that the connection to the vacuum pump can be made with small metal flange components.
On request, a vacuum glass tap or a bonded metal flange can also be offered as a pump flange. The cryostats have a bulkhead flange with an O-ring groove as the head flange.

All helium cryostats are manufactured exclusively to customer order. Changes to dimensions, connections or volumes can usually be made at no additional cost. The LHe cryostats listed in the table correspond to the most common dimensions and volumes. LHe cryostats are supplied with opposing viewing strips as standard. Of course, the cryostats can also be offered with a visible strip or fully silver-plated.

Free inside diameter at the head flange

NW 60 57 mm
NW 100 97 mm
NW 120 117 mm
NW150 147 mm
NW 200 197 mm

Technical data

Type D.I. [mm] D.A. [mm] H.I. [mm] Head flange H.F. [mm] Volume [l]
LHC 1-F 60 80 900 NW60 950 2.0
LHC 2-F 70 90 900 NW60 950 3.0
LHC 3-F 80 105 900 NW60 950 4.0
LHC 4-F 99 120 900 NW100 960 6.0
LHC 5-F 104 130 900 NW100 960 7.0
LHC 6-F 124 150 900 NW120 960 9.5
LHC 7-F 136 160 900 NW150 975 11.5
LHC 8-F 158 185 900 NW150 975 15.5
LHC 9-F 200 230 900 NW200 975 25.0