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  2. Hydraulic seal - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_seal

    Hydraulic Piston seals prevent fluid from crossing the area of the piston head. Rod seals ensure that fluid does not leak from the cylinder and adequate pressure is maintained. Wiper seals are installed to prevent contamination from entering the hydraulic system. [2] A rod seal prevents leakage of hydraulic fluid to the outside of the sealing ...

  3. Multilevel groundwater monitoring systems - Wikipedia

    en.wikipedia.org/wiki/Multilevel_groundwater...

    Westbay packers or backfilled seals are used to seal the borehole between monitoring zones to prevent the unnatural vertical flow of groundwater in the wellbore and maintain the in situ distribution of fluid pressures and chemistry. The Westbay system can be installed in either open rock boreholes or cased wells with multiple screens.

  4. Compression fitting - Wikipedia

    en.wikipedia.org/wiki/Compression_fitting

    A compression fitting 15 mm isolating valve. A compression fitting is a fitting used in plumbing and electrical conduit systems to join two tubes or thin-walled pipes together. . In instances where two pipes made of dissimilar materials are to be joined (most commonly PVC and copper), the fittings will be made of one or more compatible materials appropriate for the connect

  5. Hydraulic cylinder - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_cylinder

    The advantage of a seal gland is easy removal and seal replacement. The seal gland contains a primary seal, a secondary seal/buffer seal, bearing elements, a wiper/scraper, and a static seal. In some cases, especially in small hydraulic cylinders, the rod gland and the bearing elements are made from a single integral machined part.

  6. O-ring - Wikipedia

    en.wikipedia.org/wiki/O-ring

    Installation damage – This is caused by improper installation of the O-ring. Spiral failure – Found on long-stroke piston seals and – to a lesser degree – on rod seals. The seal gets "hung up" at one point on its diameter (against the cylinder wall) and slides and rolls at the same time.

  7. Seal (mechanical) - Wikipedia

    en.wikipedia.org/wiki/Seal_(mechanical)

    A seal is a device or material that helps join systems, mechanisms or other materials together by preventing leakage (e.g. in a pumping 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 .

  8. Radial shaft seal - Wikipedia

    en.wikipedia.org/wiki/Radial_shaft_seal

    Radial shaft seal of Romo washing machine pump. Radial shaft seals, also known as lip seals, are used to seal rotary elements, such as a shaft or rotating bore.Common examples include strut seals, hydraulic pump seals, axle seals, power steering seals, and valve stem seals.

  9. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    It has steel blades to shear the pipe and seals to seal the annulus after shearing the pipe. Blind shear rams (also known as shear seal rams, or sealing shear rams) are intended to seal a wellbore, even when the bore is occupied by a drill string, by cutting through the drill string as the rams close off the well. The upper portion of the ...

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