Electronics Protection - Summer 2017 - 13

Feature
44. Full size rack with door. Ultra-soft twin shield with
separate water seal or knitted mesh over silicone tube
with water seal, V-shape with additional water sealing,
thickness 6-10 mm are suitable. Other products like
finger strips, textile-covered parts, clip-on gaskets or
custom build hybride gaskets are suitable. (Fig. 20)

Figure 19. (left) Solutions for small constructions.
Figure 20. (right) Solutions for larger constructions such as
server racks

Shieled Doors

45. The closing force of a shielded door/Faraday cage door should be reduced as much as possible.so that it can be
opened by hands. For more information read #55 .
46. Gasket Thickness: Ultra-soft gaskets will help limit the closing force as well as bending of the door.
47. Just as indication, at a server cabinet of 600 by 2,500, a gasket of 6 mm thick may be used and an electronics
housing 200 by 600 mm a gasket of 6 by 4 mm is an optimal size . All our gaskets can also be provided with water
sealing. In order for a gasket to have sufficient stability, its width should exceed its height.
48. In the case of a screwed connection at a housing, entry panels, windows, or vent panels, the closing force is less
important. Depending on the plate thickness and bolt distance, 1 to 2 mm is common and Amucor shield is a very
good choice for the materials used most often.
49. When the housing has only one edge flange while a water and EMI seal are needed, this can be created by using
clip-op gaskets. Of these gaskets more than 200 different shapes have been produced edged with mesh or highly
conductive textiles. They are mounted by means of clamping. When we cut them into shape according to the customer's wishes, they can even make angles of 90°.
50. For instruments and introducing high currents into a construction we make more than 2,400 different Be-Cu
finger strips. These are not allowed in every country and are susceptible to being damaged when they are used in a
construction that is not protected properly (knife-edge).
51. Gaskets can be made in the shape of a
frame, complete with mounting holes and selfadhesive strip for mounting, if desired.
52. In order to keep a gasket from becoming
overly compressed, it is possible to add compression stops next to the bolt holes. If there
is enough space, plastic or metal rings (compression stops) with the final thickness can be
integrated in the gasket.

Figure 21. (left) Example of a p-shape gasket and a u-shape gasket.
Figure 22. (right) Example image of a L-shape gasket

53. For easy mounting there are gaskets in a P-shape or U-shape available. These gaskets can be easily mounted on a
rim due to their shape (Fig. 21).
54. L-shaped gasket can be used in constructions where EMI with water sealing is required and when there is just
one flange. Maximum compression is 30 percent (Fig. 22).
55. To prevent high closure force, V-shaped gaskets can be used which clamp the door not in the direction of the
opening but in the direction of the door, so only the friction force is the closing force.
56. For special constructions, our custom-built profiles can help to create an optimal seal.
57. Watertight EMI gaskets in any shape can be cut out of sheets of material like conductive rubber, or multi-shield
with small conductive wires in the material. They have a compression of 10 to 15 percent.
Holland continued on page 14
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Table of Contents for the Digital Edition of Electronics Protection - Summer 2017