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  2. Pilot-operated relief valve - Wikipedia

    en.wikipedia.org/wiki/Pilot-operated_relief_valve

    The pressure at which the control pilot relieves is the functional set pressure of the PORV. When the pilot valve reaches set pressure it opens and releases the pressure from the dome. The piston is then free to open and the main valve exhausts the system fluid. The control pilot opens either to the main valve exhaust pipe or to atmosphere ...

  3. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    The sheet has a solid end and a flow-through end; sliding it from one position to the other opens or stops the flow. Also called sliding blind valve; Outflow valve: regulates flow and pressure, part of cabin pressurization; Pilot valve: regulates flow or pressure to other valves; Petcock, a small shut-off valve

  4. Pilot valve - Wikipedia

    en.wikipedia.org/wiki/Pilot_valve

    Pilot valves are useful because they allow a small and easily operated feed to control a much higher pressure or higher flow feed, which would otherwise require a much larger force to operate; indeed, this is even useful when a solenoid is used to operate the valve. Pilot valves are often used in critical applications (e.g., emergency and SIS ...

  5. Larner–Johnson valve - Wikipedia

    en.wikipedia.org/wiki/Larner–Johnson_valve

    The pilot valve gives a proportional control over main valve flowrate, with the opening being controlled, slow and gradual. If the pilot valve is closed, pressure now builds up in the upper chamber, overwhelming the lower pressure and force in the downstream chamber. The valve is once again forced closed. [2]

  6. New Jersey teacher taped 9-year-old boy to desk for nearly an ...

    www.aol.com/news/jersey-teacher-taped-9-old...

    A teacher in New Jersey was arrested on allegations that he taped a nine-year-old student to his desk for close to an hour, while a teacher's aide was accused of failing to intervene.. Lenox ...

  7. Amazon ignored warnings about worker injuries, Senate ... - AOL

    www.aol.com/news/amazon-ignored-warnings-worker...

    Amazon knew of the link between increased worker injuries and the company's production quotas, but its executives allegedly rejected safety recommendations to loosen its mandates, an investigation ...

  8. 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.

  9. Campaign finance records show Harris' $1 million payment to ...

    www.aol.com/campaign-finance-records-show-harris...

    WASHINGTON ― As Democrats reel over how Vice President Kamala Harris' losing campaign spent more than $1 billion, a new campaign finance report confirms that the Democratic presidential nominee ...

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