This
chapter describes the materials commonly used in the construction
of mechanical seals and the factors influencing selection for
different applications. a mechanical seal can be split into four
main groups of components:
Flexible member( O ring, gaskets,
Rubber bellow)：NBR / HNBR / VITON / EPDM
Face (Primary Ring): Carbon / Ceramic / SIC
/ TC
Seat (Stationary Ring): Carbon
/ Ceramic / SIC / TC
Metal Parts ( Spring , Sleev,
Spring hold ) : SUS304 / SUS316 / MONEL / STELLITE
While individual seal designs vary, in almost all cases these components can
be readily distinguished. Selection of the materials used in mechanical seals
is based on experience, backed up where necessary by laboratory testing. In normal
circumstances material selection is the responsibility of the seal manufacturer
and it is thus essential that he is provided with full details of the fluid coming
into contact with the seal. These should include minor chemical constituents
and off design conditions that can occur in service. For instance, pumps operating
in the food or pharmaceutical industries may be subject periodically to special
sterilization procedures which can involve flushing with different chemical fluids
from those normally handled.
Detailed information : Carbon; Tungsten; Silicon
carbide; Flexible
Member; Elasticity
Member;Other
Material |
