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  2. Gate valve - Wikipedia

    en.wikipedia.org/wiki/Gate_valve

    Gate valves may have flanged ends drilled according to pipeline-compatible flange dimensional standards. Gate valves are typically constructed from cast iron, cast carbon steel, ductile iron, gunmetal, stainless steel, alloy steels, and forged steels. All-metal gate valves are used in ultra-high vacuum chambers to isolate regions of the chamber ...

  3. Sluice - Wikipedia

    en.wikipedia.org/wiki/Sluice

    Flap sluice gate A fully automatic type, controlled by the pressure head across it; operation is similar to that of a check valve. It is a gate hinged at the top. When pressure is from one side, the gate is kept closed; a pressure from the other side opens the sluice when a threshold pressure is surpassed. Vertical rising sluice gate

  4. List of Valve games - Wikipedia

    en.wikipedia.org/wiki/List_of_Valve_games

    Valve's first game was Half-Life, a first-person shooter released in 1998. [2] It sold over nine million retail copies. [3] [4] Alongside Half-Life ' s launch, Valve released development tools to enable the player community to create content and mods. [5] The company then proceeded to hire the creators of popular mods such as Counter-Strike. [1]

  5. Relief valve - Wikipedia

    en.wikipedia.org/wiki/Relief_valve

    A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.

  6. Floodgate - Wikipedia

    en.wikipedia.org/wiki/Floodgate

    Ring jet valves are similar to fixed cone valves, but have an integral collar that discharges water in a narrow stream. They are suitable for heads up to 50 m. They are suitable for heads up to 50 m. Jet flow gate , similar to a gate valve but with a conical restriction prior to the gate leaf that focuses the water into a jet.

  7. Fiancé of teacher found with 20 stab wounds suggests what led ...

    www.aol.com/news/fianc-teacher-found-20-stab...

    Philadelphia teacher Ellen Greenberg's death was ruled a suicide after the 27-year-old was found with 20 stab wounds; her fiancé makes his first public statement on her death.

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