MarketSeal (mechanical)
Company Profile

Seal (mechanical)

A seal is a device or material that helps join systems, mechanisms, or materials together to contain pressure, prevent leakage of fluid, or exclude contamination. The effectiveness of a seal depends on compression in the case of gaskets and adhesion in the case of sealants. Seals are installed in pumps in a wide range of industries including chemicals, water supply, paper production, food processing, and many other applications.

Seals relying on compression
Closure (container)Crown cork, a.k.a. bottle cap • LidCompression fittingCompression seal fittingDiaphragm sealDouble seam, the crimped seal used in canning • End-face mechanical sealFace sealGasket or mechanical packing • Flange gasketHose couplingInflatable seal, a seal that inflates and deflates in three basic directions of operation: the axial direction, the radial-in direction, and the radial-out direction. Each of these inflation directions has its own set of performance parameters for measurements such as the height of inflation and the center-line bend radius that the seal can negotiate. Inflatable seals can be used for numerous applications with difficult sealing issues. • Obturating ringPiston ringRadial shaft sealStopper (plug), a.k.a. bung or cork • Drain plugLaboratory rubber stopperWasherBodok seal, a specialized gas sealing washer for medical applications • Bonded seal, also known as Dowty seal or Dowty washer. A type of washer with integral gasket, widely used to provide a seal at the entry point of a screw or bolt • O-ringO-ring boss sealStuffing box (mechanical packing) • Wiper seal • Split seal, multi-part seals that offer easier installation and maintenance • Bridgman seal, a piston sealing mechanism that creates a high-pressure reservoir from a lower pressure source ==Seals relying on fusion or adhesive bonding==
Seals relying on fusion or adhesive bonding
Glass-ceramic-to-metal sealsGlass-to-metal sealHeat sealHermetic sealInduction sealing or cap sealing • PuttySealant or adhesive • Soldering and brazingWelding ==Seals made by liquids blocking gases==
Seals made by liquids blocking gases
Ferrofluidic sealTrap (plumbing) or siphon trap ==Non-contact seals==
Non-contact seals
Dry gas sealHydrodynamic sealHydrostatic sealLabyrinth seal, a seal which creates a tortuous path for the escaping gas or liquid ==See also==
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