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  2. Underground pneumatic boring - Wikipedia

    en.wikipedia.org/wiki/Underground_pneumatic_boring

    A piercing tool uses compressed air to bore through the ground. Manufacturers have proprietary standards and control mechanisms. Compressed air is run to the piercing tool through a pneumatic hose. Additionally an oiler attachment is used to send oil along with the compressed air, similar to a jackhammer. Inside the piercing tool is a piston. A ...

  3. Cable jetting - Wikipedia

    en.wikipedia.org/wiki/Cable_Jetting

    Compressed air is injected at the duct inlet and flows through the duct and along the cable at high speed. (Preferably, no suction pig is used at the cable head.) The high speed air propels the cable due to drag forces and pressure drop. The friction of the cable against the duct is reduced by the distributed airflow, and large forces that ...

  4. Compressed air - Wikipedia

    en.wikipedia.org/wiki/Compressed_air

    Compressed air is air kept under a pressure ... or supplied from the surface at lower pressure through an air line or diver ... piping, and installation costs; 10% ...

  5. Air-line fitting - Wikipedia

    en.wikipedia.org/wiki/Air-line_fitting

    Nipples with mating safety couplings. Also known as pneumatic couplings, quick disconnects, air couplers, quick connect couplers, and quick couplers, hand-operable air-line fittings allow manual disconnection of gas supply lines, including compressed air and breathable air (a subset of breathing gases).

  6. Air line - Wikipedia

    en.wikipedia.org/wiki/Air_line

    The compressed air lines will be piped from the compressor to one or multiple point of use outlets. At the outlet of a fixed air line you will typically find a Pressure regulator installed upstream of the termination/outlet point, this allows the user to regulate the pressure and flow of air to suit the desired use.

  7. Pneumatic tube - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_tube

    A pneumatic tube system in Washington, D.C., in 1943. Pneumatic tubes (or capsule pipelines, also known as pneumatic tube transport or PTT) are systems that propel cylindrical containers through networks of tubes by compressed air or by partial vacuum.