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.
무역박람회 & 이벤트
29.
January
Trade fair LED Japan, Tokyo, 日本国, 29.01 - 31.01.2020
04.
February
Trade fair SPIE PhotonicsWest, San Francisco, United States, 04.02 - 06.02.2020
11.
February
Trade fair Medical Design & Manufacturing (MD&M) West, Anaheim, CA, United States, 11.02 - 13.02.2020
10.
March
Trade fair OFC-Optical Networking and Communication Conference & Exhibition, San Diego, United States, 10.03 - 12.03.2020
연락처
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SCHOTT Korea Co., Ltd.
Seoul 8F. Samseong-Building, 623 Teheran-ro, Gangnam-gu
06173
대한민국
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E-Mail to SCHOTT+82 2 3456 0328+82 10 2419 7143
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