Ceramic insulators and insulating tubes for high-voltage applications
Insulators and insulating tubes made of alumina F99.7 and F99.7hf can be provided with ribs and glazed on the outside. The rib structure increases the creepage distance and leads to increased dielectric strength in atmospheric applications. The glaze facilitates handling and cleaning of the component. Depending on their design, our insulating tubes are also suitable for cryogenic applications under liquid helium or liquid nitrogen. Temperature range: -271 °C to 450 °C. The insulating tubes are tested for vacuum tightness as standard: He leak rate: < 10-9 mbar l/s and can also be fitted with various flange types, such as CF, KF, COF.
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Insulating tube type A
A ceramic tube with metal connecting pipes, 13.5 mm external diameter. It can be welded directly into vacuum chambers and pipework, and is also suitable for cryogenic applications down to -271 °C.
| Article number | Operating voltage | ØF | ØA | ØJ | G | L |
| 559-1464 | 5 | 8x6 mm | 13.5 mm | 10 mm | 12 mm | 39 mm |
Insulating tube type B
Designed for 15 kV. Thanks to its 1.4301 stainless steel connecting tubes, it can be welded directly into stainless steel vacuum systems without the need for intermediate components. Optionally available with a CF, KF or COF flange.
| Article number | Voltage (DC) | ØF | ØA | ØJ | G | L |
| 559-3664-2 | 15 kV | 18 mm | 23 mm | 18 mm | 30 mm | 74 mm |
Insulating tube type C
Three ribs extend the creepage distance to 44 mm, thereby increasing the dielectric strength on the atmospheric side. Rated for 15 kV, with Ni42 terminal caps.
| Article number | Voltage (DC) | No. of flutes | Leakage path | ØF | ØA | ØJ | G | L |
| 559-0654 | 15 kV | 3 | 44 mm | 36 mm | 46 mm | 25 mm | 30 mm | 67,6 mm |
Standoffs type A
Designed for 15 kV. For the spark-free installation of busbars, electrodes and enclosure components.
| Article number | Voltage (DC) | Leakage path | ØD | L | L1 |
| 558-1162 | 15 kV | 40 mm | 24 mm | 30 mm | 9 mm |
Standoffs type B
The dense ribbing provides 130 mm of travel over a length of 80 mm. M6 internal thread at both ends; available in glazed or unglazed versions.
| Article number | Voltage (DC) | Leakage path | ØD | L | L1 |
| 558-2105 | 40 kV | 130 mm | 24 mm | 80 mm | 9 mm |
Standoffs type C
Ceramic cylinder with a diameter of just 7.5 or 9.5 mm and copper threaded inserts. For 10 or 15 kV, ideal where space is limited.
| Article number | Voltage (DC) | Leakage path | ØD | L | L1 |
| 558-1511 | 10 kV | 25 mm | 7.5 mm | 25 mm | 8 mm |
| 558-1984 | 15 kV | 38 mm | 9.5 mm | 38.1 mm | 6 mm |
Customised insulating components
Ceramic customized insulating tube
Customised insulating tube for a physical institute.
Insulating tube with double-sided ISO-KF flange
Insulating tube with double-sided ISO-KF flange
