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2. POL valve - Wikipedia

   en.wikipedia.org/wiki/POL_valve

   POL valve on a 45 kg LPG cylinder Male fitting to match POL valve A POL valve (originally for Prest-O-Lite) is a gas connection fitting used on liquefied petroleum gas (LPG) cylinders. The oldest standard for such connections, it was developed by the Prest-O-Lite company, hence the name. [ 1 ]

3. Propane, butane, and LPG container valve connections

   en.wikipedia.org/wiki/Propane,_butane,_and_LPG...

   A DIN standard for gas cylinder valves for test pressures up to 300 bar (4,400 psi). EN 15202 [9] A European standard for LPG equipment and accessories, specifying LPG cylinder valve connections. [10] EN 417: European norm specification concerning non-refillable metallic cartridges for liquefied petroleum gases.

4. Reduced pressure zone device - Wikipedia

   en.wikipedia.org/wiki/Reduced_pressure_zone_device

   It is theoretically possible that, when both valves are faulty, backflow could occur, should the reverse flow rate exceed the capacity of the relief valve. Because certain combinations of check valve failure and/or system backpressure cause the relief valve to discharge, the device must be mounted in a location where the drain will not become ...

5. 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.

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. NFL playoff schedule: Dates, times, TV info for wild-card ...

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   The NFL playoff schedule is about to be set, with the wild-card dates and times for every matchup to be revealed during Week 18.

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.

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!