Hermeticity

One of the foremost quality characteristics of SCHOTT glass-to-metal seals is our hermeticity. Because of its importance to the functionality of components, the vacuum tightness of our glass-to-metal seals is constantly monitored through random sample inspections. Tightness tests are performed with helium leakage detectors that work according to the mass-spectrometer principle.

Using helium as a test medium, modern leakage detectors are capable of tracing minute leaks of 10-12 mbar l/s. However, this is only possible under laboratory conditions and requires long pumping and measurement cycles.

In tough everyday usage, leakage rates of up to 10-8 mbar l/s can realistically be measured. That is why SCHOTT glass-to-metal seals are generally guaranteed to a leakage rate of 10-8 mbar l/s; in this case, the pressure differential between the interior and the exterior is 1 bar. In special cases and upon agreement, leakage rates down to 10-11 mbar l/s can be confirmed and guaranteed, because, as a rule, SCHOTT glass-to-metal seals also meet these lower leakage requirements.

The leakage rate of SCHOTT glass-to-metal seals can also be tested under non-static conditions. For example, it is possible to conduct cap welding tests with increased welding stresses and then to determine the remaining leakage rate.
贸易展览会与活动
05.
September
展会 CIOE - China International Optoelectronic Expo, Shenzhen, 中国, 05.09 - 08.09.2018
17.
September
展会 Gastech, Barcelona, España, 17.09 - 20.09.2018
25.
September
展会 European Microwave Week, Madrid, España, 25.09 - 27.09.2018
12.
November
展会 COMPAMED, Duesseldorf, Deutschland, 12.11 - 15.11.2018
业务联系
肖特(上海)精密材料和设备国际贸易有限公司
上海市虹梅路1801号凯科国际大厦301室
邮编:200233
中国
邮件联系+86-21 3367 8000
改动
SCHOTT在本网站上使用Cookies来提高用户体验,并提供可能的最佳服务。一旦浏览本网站,即表示您同意我们使用Cookies。