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2. Leslie Controls - Wikipedia

   en.wikipedia.org/wiki/Leslie_Controls

   Leslie was purchased in 1989 by Watts Industries, Inc. of Andover, Massachusetts, which made water valves and was trying to increase its share of the valve industry. Leslie's 1988 sales were $33 million, Watts had sales of $181 million. [13] Leslie bought K&M Valve Company in 1995. [14]

3. Pilot-operated relief valve - Wikipedia

   en.wikipedia.org/wiki/Pilot-operated_relief_valve

   A separate actuator on the piping releases pressure in the line if it crosses a threshold. This releases the pressure on the back of the seal, causing the valve to open. The essential parts of a PORV are a pilot valve (or control pilot), a main valve, a pilot tube, the dome, a disc or piston, and a seat. The volume above the piston is called ...

4. Repair kit - Wikipedia

   en.wikipedia.org/wiki/Repair_kit

   A repair kit or service kit is a set of items used to repair a device, commonly comprising both tools and spare parts. Many kits are designed for vehicles, such as cars, boats, airplanes, motorbikes, and bicycles, and may be kept with the vehicle in order to make on-the-spot repairs.

5. National Board of Boiler and Pressure Vessel Inspectors

   en.wikipedia.org/wiki/National_Board_of_Boiler...

   Accredited repair organizations qualify to stamp the National Board VR symbol on repair nameplates. [ 3 ] The National Board lab supports industry research and development by testing new designs, serving as a comparative standard for other laboratories, validating new concepts, and – upon jurisdiction request – assist in boiler and pressure ...

6. Adjustable pressure-limiting valve - Wikipedia

   en.wikipedia.org/wiki/Adjustable_pressure...

   An adjustable pressure-limiting valve (commonly abbreviated to APL valve, and also referred to as an expiratory valve, relief valve or spill valve) is a type of flow control valve used in anaesthesiology as part of a breathing system. It allows excess fresh gas flow and exhaled gases to leave the system while preventing ambient air from ...

7. Watt steam engine - Wikipedia

   en.wikipedia.org/wiki/Watt_steam_engine

   Watt realised that the heat needed to warm the cylinder could be saved by adding a separate condensing cylinder. After the power cylinder was filled with steam, a valve was opened to the secondary cylinder, allowing the steam to flow into it and be condensed, which drew the steam from the main cylinder causing the power stroke.