LHe glass cryostats with constriction

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 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.

LHe with constriction

Technical data

Type	D.I. [mm]	D.A. [mm]	H.I. [mm]	D.I.1 [mm]	D.A.1 [mm]	H.I.1 [mm]	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