Compression Deflection Data for Fluoroelastomer Products
Aside from chemical resistance, the other advantage of Fluoroelastomer products is the excellent resistance to high temperatures. Customers often ask, “what is the service life of this seal?” This is a difficult question to answer and depends on a number of factors, such as the type of fluid or chemical it is sealing against; the temperature of the service environment; whether the seal is static or under dynamic flex conditions; the sealing pressures involved; and most importantly- the attention and care given during the installation and flange tightening procedure. The rubber seal can be mechanically damaged or torn by improper bolt torque technique.
The degree of compression necessary to achieve a leak free seal is dependent on the internal pressure and temperature of the fluid stream; the parallelism of the flange surfaces; the design of the seal area ( machined groove, perimeter backing ring; or smooth flange); and the composition of the flange and piping (metal or resin/fiberglass). For most seal applications, a maximum deflection in the gasket thickness of 25% is recommended. We have tested several of our sheet compounds for compressive strength at various percentage deflections and they are shown below.
|Compression Deflection Table|
|% Compression Deflection
Compressive Strength (psi)