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details TEFLAT/BLACKFLAT

details: TEFLAT-BLACKFLAT

TEFLAT/BLACKFLAT details

TEFLAT/BLACKFLAT detail main

SIZES AND PRICING

Flange
outer diam.
Gasket
outer diam.
Knife-edge
diameter
Gasket
inner diam.
TEFLAT™
(white)
BLACKFLAT™
(black)
100 count 100 count
1.33″ 0.820/0.835″ 0.75″ 0.62″ $285 no stock
2.75″ 1.875/1.890″ 1.62″ 1.50″ no stock no stock
4.50″ 3.230/3.245″ 3.04″ 2.75″ $595 no stock
6.00″ 4.730/4.745″ 4.54″ 4.00″ $805 $970
8.00″ 6.730/6.745″ 6.54″ 6.00″ $1090 no stock
10.00″ 8.730/8.745″ 8.54″ 8.00″ no stock no stock

Note: Optional black color (model BLACKFLAT™) has carbon added to provide an opaque gasket for applications in which a completely light-tight seal is required, as some light which enters through the leak-check slots in knife-edge flanges will transmissively scatter through the white gasket.

TEFLAT™ and BLACKFLAT™ are trademarks of Hettrick Scientific.

Teflon® is a registered trademark of DuPont.

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TEFLAT™/BLACKFLAT™ gaskets provide many advantages when compared to conventional sealing materials for knife-edge flanges:

• Require much less force than copper, significantly reducing assembly time (and saving knuckles!).
• May be used with aluminum (or stainless steel) flanges and ports.
• Unlike copper gaskets, Teflon® gaskets are reusable, if not removed from flange and kept clean (number of re-uses may vary).
• Unlike copper gaskets, Teflon® gaskets do not tarnish with exposure to air.
• Unlike copper gaskets or o-rings, Teflon® does not react with most chemicals.
• Avoids the use of grease often necessary to keep thin section o-rings registered in place during assembly, particularly for a vertical flange orientation.
• Minimizes contamination of vacuum systems, particularly important for coating applications, high purity analyses and ultra-high vacuum applications.
• Unlike thin section o-rings, rigid Teflon® gaskets self-locate against the flange lip to provide a clear confirmation of a correct seal, preventing leaks and extruded o-rings.
• Less expensive than rectangular section o-rings.

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