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  2. Pilot-operated relief valve - Wikipedia

    en.wikipedia.org/wiki/Pilot-operated_relief_valve

    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. Snap acting At set pressure the valve snaps to full lift.

  3. Pressure regulator - Wikipedia

    en.wikipedia.org/wiki/Pressure_regulator

    All modern pressure cookers will have a pressure regulator valve and a pressure relief valve as a safety mechanism to prevent explosion in the event that the pressure regulator valve fails to adequately release pressure. Some older models lack a safety release valve [citation needed]. Most home cooking models are built to maintain a low and ...

  4. Parker Vacumatic - Wikipedia

    en.wikipedia.org/wiki/Parker_Vacumatic

    The Vacumatic featured a brand new filling mechanism which took 5 years to develop at a cost of $125,000. Parker boasted the model to be the first self-filler without a sac; while this was not entirely true, the filling mechanism was still a great innovation. By using a diaphragm rather than a sac, the whole barrel can be used as a reservoir.

  5. Parker Hannifin - Wikipedia

    en.wikipedia.org/wiki/Parker_Hannifin

    Parker-Hannifin Corporation, originally Parker Appliance Company, usually referred to as just Parker, is an American corporation specializing in motion and control technologies. Its corporate headquarters are in Mayfield Heights, Ohio , in Greater Cleveland (with a Cleveland mailing address).

  6. Charles Parker Company - Wikipedia

    en.wikipedia.org/wiki/Charles_Parker_Company

    The Charles Parker Company was in operation until the 1970s. In 1973, the company participated as an exhibitor at the Eastern States Exposition in West Springfield, MA. [6] Among the diversity of Charles Parker products, Parker guns are very actively collected and traded, including the historical catalogues illustrating the designs.

  7. Glossary of oilfield jargon - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_oilfield_jargon

    Bell nipple: An enlarged pipe at the top of a casing string that serves as a funnel to guide drilling tools into the top of the well.; Big bear: A big bear is a hitch (see hitch) that lasts a minimum of 50 straight days.

  8. Play Spades Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/spades

    Spades is all about bids, blinds and bags. Play Spades for free on Games.com alone or with a friend in this four player trick taking classic.

  9. Arthur L. Parker - Wikipedia

    en.wikipedia.org/wiki/Arthur_L._Parker

    Arthur LaRue Parker (November 16, 1885 – January 1, 1945) was an American businessman and inventor, known for founding Parker Hannifin Corporation (then known as Parker Appliance Company). Early life and education

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