Page 108 - GETELEC catalogue US 2020

GTS Flexi-Shield

Spira’s Flexi-Shield gasket offers the best of both worlds.This
gasket combines the EMI shielding performance of our other
spiral gaskets with the rain/wind/dust sealing of an elastomer.
special process wraps our highly conductive spiral around a
soft silicone tube.

This results in gaskets that are very easy to handle, are
rugged enough to be used in demanding sliding applications,
provide as little as two pounds of closure force per inch, and
offer moderate to high shielding, depending on the materials
chosen. The low force series is especially well-suited to
shielding the front/rear panels of VME/VXI and similar
enclosures.

Flexi-shield part numbers (RoHs tin plated stainless steel) Recommended groove dimensions

Diameter Depth (L) Width (G) Width (W)
(mm) Standard force * Moderate force Low force +0.05 /-0 (mm) +0.18 / -0.13 +0 / -0.05 (mm)
(mm)
1.60 ± 0.08 GTS-SQ-160 GTS-MQ-160 GTS-LQ-160 1.17 2.39 1.52
1.78 ± 0.08 GTS-SQ-178 GTS-MQ-178 GTS-LQ-178 1.35 2.39 1.70
2.39 ± 0.10 GTS-SQ-239 GTS-MQ-239 GTS-LQ-239 1.78 3.18 2.29
2.62 ± 0.10 GTS-SQ-262 GTS-MQ-262 GTS-LQ-262 1.96 3.58 2.51
2.69 ± 0.10 GTS-SQ-269 GTS-MQ-269 GTS-LQ-269 2.03 3.58 2.59
3.18 ± 0.10 GTS-SQ-318 GTS-MQ-318 GTS-LQ-318 2.39 4.34 3.07
3.53 ± 0.13 GTS-SQ-353 GTS-MQ-353 GTS-LQ-353 2.64 4.75 3.40
3.58 ± 0.13 GTS-SQ-358 GTS-MQ-358 GTS-LQ-358 2.67 4.75 3.45
4.75 ± 0.20 GTS-SQ-475 GTS-MQ-475 GTS-LQ-475 3.56 6.35 4.60
6.35 ± 0.25 GTS-SQ-635 GTS-MQ-635 GTS-LQ-635 4.70 8.71 6.10

COMPRESSION FORCE

Flexi-Shield gaskets come in three different resiliencies (as shown below). Optimal compression of the gasket
is 25% of the diameter of the spiral. Since the force to compress the gasket is a function of the cube of the
thickness of the stainless steel ribbon, the compression forces shown are approximate.
Standard Force: 5.5 kg/cm
Moderate Force: 1.8 kg/cm
Low Force: 0.4 kg/cm

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