Page 26 - Design Criteria.qxd

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Welcome to the Next Generation of Sealing Technology
Spiral Wound Gaskets
Manufacturing Capabilities and Tolerances
Recommended Design Parameters
Gasket
Maximum
Recommended
Recommended
Thickness
Inside
Crossectional
Compressed
Dimension
Width
Thickness **
0.0625”
Up to 6”
3/8”
0.050” / 0.055”
0.0625”
6” to 15”
1/4”
0.050” / 0.055”
0.100”
10”
1/2”
0.075” / 0.080”
0.125”
Up to 20”
1”
0.090” / 0.100”
0.125” *
20” to 40”
3/4”
0.090” / 0.100”
0.175”
Up to 40”
1”
0.125” / 0.135”
0.175” *
40” to 60”
1”
0.125” / 0.135”
0.175” *
60” to 70”
7/8”
0.125” / 0.135”
0.175” *
70” to 75”
3/4”
0.125” / 0.135”
0.250”
90”
1”
0.180” / 0.200”
0.285”
185”
1”
0.200” / 0.220”
Preferred size range in relation to thickness shown in bold type.
* PTFE filled FLEXITALLIC gaskets in this size range are unstable and are subject to “springing apart” in shipping and
handling. Specify next gasket thickness up.
** The recommended compressed thickness is what experience has indicated to be the optimum range in order to
achieve maximum resiliency of the gasket. Additional compression of 0.010” may be tolerated on all gasket thick-
nesses with the exception of the 0.0625” and the 0.100” thick gaskets. This is on the assumption that the flange sur-
face finishes are relatively smooth. Refer to “Flange Surfaces” on page 45. When attempting to contain hard to hold
fluids, or pressures above 1000 psi, it is suggested that compression be maintained at the lower range of the recom-
mended compressed thickness.
Tolerances
Gasket Diameter
Inside Diameter
Outside Diameter
Up to 10”
± 1/64”
± 1/32”
10” to 24”
± 1/32”
± 1/16”
24” to 60”
± 3/64”
± 1/16”
60” & Above
± 1/16”
± 1/16”
Tolerance on gasket thickness is
±
0.005”, (measured across metal winding) on all
thicknesses.