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Design Guide for Molded In-place Seals


MOLDED-IN-PLACE SEALS
Molded-in-place seals give superior resistance to stretching and mechanical damage, especially in multiple reuse applications. Whether shielding from hostile electromagnetic radiation or protecting against attack from weather or other conditions, molded-in-place seals are an excellent long term, low cost answer to sealing.
DIM.
TOLERANCES
MIN.
TYP.
NOTES
D
+/- .005
.030
.035
G
+/- .005
.035
.040
H
+/- .003
.006
.010
(EMI)
H
+/- .004
.010
.016
(Environmental)
W
+/- .005
.090
.125
SINGLE COMBINATION or ENVIRONMENTAL SEAL
MATERIAL CHOICE
SILICONE
Use temperature of -65 to +500 degrees F.
Will swell in harsh solvents
Extremely long life, Lower cost
ZZ-R-765 may be used in several durometers

FLUOROSILICONE
Similar properties to silicone
Resistant to most solvents
MIL-R-25988, Type II, Class I, Grade 40 or 50
is normally preferred

CLOSURE PRESSURE
A single .035 wide rib in 80 durometer requires 3 pounds per inch for closure. 20 to 30 durometer material can lower this to as low a one pound per inch. More ribs add proportionately.

SHIELDING MATERIALS
Several choices are available including silver plated aluminum, silver plated copper, silver plated glass, pure silver, nickel graphite. There are a variety of plated particles that can be used in shielding materials.

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Contact Elastomeric Specialties, Inc.
5510 Brooks Street
Montclair, CA 91763
(909) 986-2335
Fax (909) 986-4456