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  2. Individual involvement in the Chernobyl disaster - Wikipedia

    en.wikipedia.org/wiki/Individual_involvement_in...

    Insisting the reactor was intact, Akimov ordered Stolyarchuk and Busygin to turn on the emergency feedwater pumps. Davletbayev reported loss of electrical power, torn cables, and electric arcs. Akimov sent Metlenko to help in the turbine hall with manual opening of the cooling system valves, which was expected to take at least four hours per valve.

  3. Block and bleed manifold - Wikipedia

    en.wikipedia.org/wiki/Block_and_bleed_manifold

    Two block valves and a bleed valve are as a unit, or manifold, to be installed for positive isolation. Used for critical process service, DBB valves are for high pressure systems or toxic/hazardous fluid processes. Applications that use DBB valves include instrument drain, chemical injection connection, chemical seal isolation, and gauge isolation.

  4. Downhole safety valve - Wikipedia

    en.wikipedia.org/wiki/Downhole_safety_valve

    This means that they are installed as a component of the completion string and run in during completion. Retrieving the valve, should it malfunction, requires a workover. The full name for this most common type of downhole safety valve is a Tubing Retrievable Surface Controlled Sub-Surface Valve, shortened in completion diagrams to TRSCSSV.

  5. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Double check valve; Duckbill valve; Fill and drain valve: a valve used in space and missile industry which achieves extremely tight leakage, while providing redundant inhibits against external leakage [1] Flapper valve; Flow divider valve: a valve providing a plurality of output flows from a single fluid source [2]

  6. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    A blowout preventer (BOP) (pronounced B-O-P) [1] is a specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil or natural gas from a well. They are usually installed in stacks of other valves.

  7. Cuba runs short on fuel at pump as energy crisis festers - AOL

    www.aol.com/news/cuba-runs-short-fuel-pump...

    HAVANA (Reuters) - Cubans still reeling from months of hours-long blackouts now have a new problem on their hands: fuel shortages. Many gas stations across the island have been shuttered for days ...

  8. Isolation valve - Wikipedia

    en.wikipedia.org/wiki/Isolation_valve

    Isolation valves in a flare, relief or vent system must ensure that a flow path is always available to the flare or vent. These valves are secured in the open position (LO). Drain valves that connect a high pressure system to a low pressure drain system are locked in the closed position (LC) to prevent potential over-pressurisation of the drain ...

  9. Syrian opposition leader says Lebanon truce opened door to ...

    www.aol.com/news/syrian-opposition-leader-says...

    Syrian rebel fighters began preparations to seize Aleppo a year ago but the assault was delayed by war in Gaza and ultimately launched last week when a ceasefire took hold in Lebanon, the head of ...