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  2. Pilot-operated relief valve - Wikipedia

    en.wikipedia.org/wiki/Pilot-operated_relief_valve

    The downstream side is the pipe or open air where the PORV directs its exhaust. The outlet pipe is typically larger than the inlet. 2 in × 3 in (51 mm × 76 mm), 3 in × 4 in (76 mm × 102 mm), 4 in × 6 in (100 mm × 150 mm), 6 in × 8 in (150 mm × 200 mm), 8 in × 10 in (200 mm × 250 mm) are some common sizes.

  3. Pentair - Wikipedia

    en.wikipedia.org/wiki/Pentair

    Pentair plc (PNR) is an American water treatment company incorporated in Ireland with tax residency in UK, with its main U.S. office in Golden Valley, Minnesota. [6] Pentair was founded in the US, with 65% of company's revenue coming from the US and Canada as of 2017.

  4. 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.

  5. Flutter valve - Wikipedia

    en.wikipedia.org/wiki/Flutter_valve

    Heimlich Flutter Valve; One way valve for chest drains from www.freepatentsonline.com; Illustration of Heimlich flutter valve from Netter Medical Illustrations (the blue tubular valve) Heimlich Valve as part of a pneumothorax kit Archived 2022-10-02 at the Wayback Machine from Emergency Medical Products; Use of Heimlich Valve from www ...