A stress induced change of form or shape.
The ratio of the mass of a body to its volume, expressed as Lb/Ft3 or gm/cc. It is common for die-formed graphite foil rings to be produced to a specific density.
The pressure or vacuum condition that exists during system start-up and/or shut-down operations. During this cyclic phase in the system, both pressure and vacuum conditions may occur.
The maximum or most severe temperature expected during normal operation caused by equipment failure. (See Excursion Temp.)
PTFE or sheet rubber (generally fabric-reinforced) from which flat diaphragms are cut.
Shaped articles cut with a die from a sheet of material.
A manufacturing process in which braid or graphite foil is compressed in a mold to form a ring.
The measure of a products ability to resist passage of a disruptive discharge produced by an electric stress described in volts/mil (1 mil = 0.001").
Abbreviation for Deutsches Institut für Normung. English translation is German Industry Standard it is the European equivalent to ASTM.
The fluid pressure measured on the discharge (or outlet) side of the pump where the fluid exits the volute.
A molded diaphragm in which the entire center is depressed below the plane of the rim.
The systematic location of bolt holes on the mating and expansion joint flange through which the expansion joint will be attached.
A method of vulcanizing rubber in which the product is wrapped around a drum and cured in hot air or steam, usually with a separator or wrapping jacket.
The inside dimension of the ductwork measured from the duct walls prior to any form of coating.
The ability to be drawn. Example: The stretching of metal wire to a smaller cross-section.
An arbitrary numerical value measuring the resistance to indentation (without puncturing) of the indentor into the surface or rubber.
Twice the distance the center of the shaft is displaced from the center of rotation and expressed in TIR. That runout to which the seal lip is subjected due to the outside diameter of the shaft not rotating in a true circle. Synonym: Shaft Runout.
A seal required to prevent leakage past parts which are in relative motion. The opposite of static seal.