Glass tubing for UV lamps

SCHOTT's glass tubing is found in various UV lamp applications:

The sterilization of water, air and other surfaces is another of the numerous technical applications for which SCHOTT manufactures glass tubing. Certain glass types from SCHOTT are made specifically for Germicidal lamps and they provide a high resistance to solarization. This ensures consistent and efficient transmission rates during the entire lifespan of the bulb. Cost effective lamp processing is made possible by providing high dimensional accuracy in conjunction with the ability of direct glass to metal seals. Not only does SCHOTT provide tubing for Germicidal lamps it also produces glass for the respective sleeve tubing. In addition, glass types are also available for lamps used in UV curing of adhesives, paints and inks.

Standard borosilicate or soda lime glasses of typical thicknesses for vessels or bulbs have a transmission cut-off in the UV-B range. This means that UV –A can pass, while UV-C is almost completely blocked.
If UV-C is required, which is around 200 – 280 nm,  then standard glasses cannot be used. SCHOTT Tubing has multiple glass types available that offer high transmission in the UV-C range, these are utilised when it comes to technical use of UV-C ray. Typically a defined volume needs to be hermetically sealed while only light can cross between the inside and outside, this is used in the applications of UV-Sensors or UV Lamps. A highly suitable and unique solution for a hermetic seal is the SCHOTT tubing sealing glasses that allow a direct and hermetic seal with metals, alloys and ceramics. Glass 8337b has a transmission of around 254 nm that is comparable to quartz but it can be sealed directly with tungsten and Kovar-alloys. Such a direct seal is very stable, durable and can remain gas tight for many years. Glass 8337b also has minimized solarization upon UV radiation.
Other highly UV-transmitting glasses are high expanding soda lime glasses (8405) or especially corrosion resistant glass types (8347).

Glass used in medical applications have strict standards and requirements. One example is treating skin diseases such as psoriasis with phototherapy. In order for the treatment to be safely administered there can be no high energy radiation or harmful UV-B rays released during the treatment. SCHOTT's tubing is specifically desgined to fulfill these requirements.

Special applications such as deuterium lamps for analytic purposes (spectroscopy) or optical sensors are further uses for SCHOTT's glass tubing. By offering a very high rate of transmission as well as allowing for direct fusing with tungsten or kovar SCHOTT's tubing is ideal for these applications.
Erich-Schott-Strasse 14
95666 Mitterteich
E-Mail to SCHOTT+49 (0)9633/80-0