A mechanical seal is a device which helps join systems or mechanisms together by preventing leakage (e.g., in a plumbing system), containing pressure, or excluding contamination. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets.
A stationary seal may also be referred to as "packing."
- Induction sealing or cap sealing
- Adhesive, sealant
- Bodok seal, a specialized gas sealing washer for medical applications.
- Bridgman seal, a piston sealing mechanism that creates a high pressure reservoir from a lower pressure source.
- Compression seal fitting
- Diaphragm seal
- Ferrofluidic seal
- Gasket or Mechanical Packing
- Glass-ceramic-to-metal seals
- Hose coupling, various types of hose couplings
- Hermetic seal
- Hydrostatic seal
- Hydrodynamic seal
- Labyrinth seal A seal which creates a tortuous path for the liquid to flow through
- Lid (container)
- Rotating face mechanical seal
- Face seal
- Radial shaft seal
- Trap (plumbing) (siphon trap)
- Stuffing box, Gland Assembly (engineering) (mechanical packing)
- Split Mechanical Seal
- Wiper seal
- Dry gas seal
- Exitex seal
- Clause 5.1 BS 6093:2006
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