Sealing Theory - (Home)
Static vs. Dynamic Sealing
Leakage Control
Lip vs. Squeeze Seals
Effects of Lip Geometries
Friction
Pressure Effects and Extrusion
Seal Wear
Seal Stability
Surface Speed
Compression Set
Influence of Temperature
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| O-Rings,
seals and bearings for all applications |
Influence of Temperature
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All seal materials have a specified operating
temperature range (see Materials).
These
temperatures are provided as guidelines and should not
be used as specification limits. It is wise practice to
stay well within this range, knowing that physical properties
are severely degraded as either limit is approached.
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Temperature affects extrusion, wear,
chemical resistance and compression set, which ultimately
influences the sealing ability of a product. High temperatures
reduce abrasion resistance, soften
materials, allowing them to extrude at lower pressures,
increase compression set and can accelerate chemical attack.
Low temperatures can cause materials to shrink and harden,
reducing resiliency and sealability. Some of these problems
can be solved by using low temperature expanders or metal
springs as a component of the seal selection (see
Materials).
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