WHAT ARE DIAPHRAGM SEALS MADE OF?
Diaphragms seals are available to handle a broad range of applications and fluids. Elastomers are commonly used, since diaphragm seals must be highly flexible. They also include a vast array of both specialty and general purpose rubbers. Low pressure applications generally benefit from the use of elastomers.
When specific chemical compatibility and high pressure ratings are required, metal diaphragms made of titanium, stainless steel, or various other metals are used. Flush welded versions and flanged assemblies are available.
WHEN ARE DIAPHRAGM SEALS USED?
Whenever a process fluid needs to be protected from a pressure sensor, or vice versa, a diaphragm seal will come in handy. For instance, in pharmaceutical and food sanitary processes where allowing process fluid to accumulate could compromise the purity of the fluid. Or, if the metal surface of the pressure sensor could contaminate a very pure process fluid, as in the petrochemical industry, diaphragm seals and capillaries should be utilized.
