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Glass to Metal Seals

GLASS – TO – KOVAR

Direct Seals: kovar several glasses (7040, 7052, 7056).
Graded seals: kovar to 7070, 7720, 7740 (pyrex) and quartz.
Temperature range: -270°C to 425°C.
Kovar may undergo a phase change below -80°C although kovar has a transformation point below -195°C.

 
GLASS – TO – COPPER

Direct Seals: OFHC copper to any glass from 0080 to 7740 (pyrex).
Graded Seals: copper to quartz, using a pyrex graded seal.
Temperature range: -270°C, to temperature just below the softening point of the glass used.
Glass to Copper
   
GLASS – TO – STAINLESS STEEL

Direct Seals: Stainless Steel 304 to any glass from 0080 to 7740 (pyrex)
Graded Seals: Stainless Steel 304 to quartz, using quartz to pyrex gradd seal.
Temperature range: -270°C to 450°C
Seals with other types of stainless steels are available on request
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Glass to Stainless Steel
   
STAINLESS STEEL TO QUARTZ

Seals are offered with tube ends or a choice of CF, Kwik or Large vacuum flanges. Custom lengths, diameters or flanges are available as special order.
Stailess Steel to Quartz
   
STAINLESS STEEL BELLOWS TO PYREX 7740

There are several standard options including PYREX glass on one end and standard cuff, heavy cuff or flange at other end or PYREX glass on both ends. Standard bellows are available in two different flex lengths. Bellows with special diameters, flex lengths, glass types, and flanges are available as custom order items.
Glass to Metal Seals - SST Bellows to Pyrex 7740