Page 12 - Design Criteria.qxd

® 13 Welcome to the Next Generation of Sealing Technology
Compressed Fiber Gaskets
Product Range
SF 1630 - A low cost mineral filled calendered sheet material, containing cellulose and aramid fiber reinforcements. This material was
developed to suit low pressure, non critical applications.
SF 2401 - A general purpose sheet material reinforced with aramid fibers and bound with
nitrile rubber. SF 2401 complies with the British Standard for non-asbestos sheet sealing
materials - BS 7531 Grade Y. When a specific polymeric binder is required, SF 2420 (SBR)
is also available.
SF 3300 - A premium quality sheet material reinforced with a blend of aramid and glass fibers
and bound with nitrile rubber. SF 3300 complies with the highest grade of the British
Standard for non-asbestos sheet sealing materials - BS 7531 Grade X. For applications in
split case pumps where a thin, complex gasket capable of withstanding a high surface stress
is required, SF 3500, a variant of SF 3300, has been developed.
Where caustic liquors have to be sealed a variant of SF 3300 reinforced with a blend
of aramid and carbon fibers is offered: this material, SF 5000 is widely used in the pulp and
paper industry.
AF 2100 - A high temperature material reinforced with non-respirable glass fibers and bound
with nitrile rubber. Because of its high compressibility, AF 2100 can be used most advanta-
geously at lower thicknesses than the CAF which it replaces.
Relative
Material Composition Applications Cost
(1 = lowest)
SF1630 Cellulose/Aramid/NBR/NR Non-critical service; hydrotest; economical sheet; 1
max temp 110 - 177°C (230 to 350°F)
SF 2401 Synthetic/NBR Excellent high performance, general purpose sheet for steam, water, gases, 2
oils, mild solvents and alkalis; max temp 177 - 350°C (350 to 662°F)
AF 2100 Glass/NBR Steam, water, gases, oils, mild acids, alkalis, general chemicals; 3
max temp 177 - 477°C (350 - 890°F)
SF 2420 Aramid/SBR Same as SF 2400 except SBR binder; ideal for the paper making Industry; 4
max temp 177 - 400°C (350 - 750°F)
SF 3300 Aramid/Glass/NBR Top Grade sheet for general industrial applications; 5
max temp 177 - 440°C (350 - 825°F)
SF 3500 Aramid/Glass/NBR More aramid fiber than SF 3300 for increased strength in split casing pumps; 6
max temp 440°C (825°F) @ 1/64” thk
SF 5000 Carbon/Aramid/NBR Especially suitable for sealing caustic liquors; 7
max temp 177 - 440°C (350 - 825°F)
Flexitallic Compressed Fiber Sheet Application Guide
Note: Maximum temperature based on material thickness.