DuPont Dow develops seals for NF3 environments

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 198 KB
• Volume: 2002
• Category: Article
• ISSN: 1350-4789
• DOI: 10.1016/s1350-4789(02)10008-0

✦ Synopsis

Metallic seal has low seating load

Garlock Sealing Technologies of Elland, UK is offering a metallic seal that is designed to meet the demanding requirements of the semiconductor, ultra-high vacuum, space and nuclear industries.

A joint development with the French atomic energy agency CEA, the Ultra-Flex seal design achieves a high sealing tightness of 10 -9 cm 3 /s He, with a clamping pressure equivalent to elastomeric seals.

It has an open 'C' cross-section, manufactured from an exterior metal sealing material -gold, aluminium, silver or copper, depending on the applicationformed over an internal metallic core of Inconel.

On loading the seal during assembly, two opposing offset ridges on the sealing face move into the optimum position as the 'C' cross-section deforms.

The metallic composition of Ultra-Flex provides benefits over elastomer seals, claims the company, including high and low temperature resistance, zero outgassing, reduced contamination and wider chemical resistance.

Ultra-Flex is available in a wide range of sizes and materials, either from stock or manufactured to customer specifications.