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  2. Shutdown valve - Wikipedia

    en.wikipedia.org/wiki/Shutdown_valve

    A blowdown valve (BDV) is a type of shutdown valve designed to depressurize a pressure vessel by directing vapour to a flare, vent or blowdown stack in an emergency. BDVs fail-safe to the open position upon failure of the control system. [1] The type of valve, type of actuation and performance measurement are similar to an ESD valve.

  3. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Valves stop (or regulate) the flow of liquids or gases. They are categorized by application, such as isolation, throttling, and non-return. Isolation valves temporarily disconnect part of a piping system to allow maintenance or repair, for example. Isolation valves are typically left in either a fully open or closed position.

  4. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    This is a pipe running from the crankcase (or the valve cover on an overhead valve engine) down to a downwards-facing open end located in the vehicle's slipstream. When the vehicle is moving, airflow across the open end of the tube creates suction (a "draught" or draft) that pulls gases out of the crankcase.

  5. Pigging - Wikipedia

    en.wikipedia.org/wiki/Pigging

    Unlock and open, then close and relock the vent and drain valves. Unlock and open door, load pig into launcher, close and lock door. Unlock and open valves V1 and V3, to create a flow path through the launcher. Partly close ‘kicker’ valve V2 to launch the pig. The launch alarm XA will indicate when the pig has been launched. Open valve V2 ...

  6. Pipefitter - Wikipedia

    en.wikipedia.org/wiki/Pipefitter

    Using an always-open or always-closed valve called a tap, pipe layers connect them to a wider system and bury the pipes. whereas, Pipe fitters plan and test piping and tubing layouts; cut, bend or fabricate pipe or tubing segments; and join those segments by threading them, using lead joints, welding, brazing, cementing, or soldering them together.

  7. Vacuum sewer - Wikipedia

    en.wikipedia.org/wiki/Vacuum_sewer

    odours close to the vacuum station can occur, a biofilter may be necessary; integrity of the pipe joints is paramount; grease can clog the sensor tube (if set up incorrectly) thus requiring preventative maintenance cleaning; vacuum valves can get stuck open leading to pressure drops in the entire system.

  8. Prepare for the coldest Arctic blast: How to keep your pipes ...

    www.aol.com/news/prepare-coldest-artic-blast...

    Thermostats matter. Being prepared is key to preventing frozen pipes, Prime Drain Cleaning and Plumbing Owner Brycen Sperlich told USA TODAY. "Open cupboards and vanities to warm pipes," said ...

  9. Isolation valve - Wikipedia

    en.wikipedia.org/wiki/Isolation_valve

    An isolation valve is a valve in a fluid handling system that stops the flow of process media to a given location, usually for maintenance or safety purposes. [1] They can also be used to provide flow logic (selecting one flow path versus another), and to connect external equipment to a system. [2]

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