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2. Plug valve - Wikipedia

   en.wikipedia.org/wiki/Plug_valve

   The plugs in plug valves have one or more hollow passageways going sideways through the plug, so that fluid can flow through the plug when the valve is open. Plug valves are simple and often economical. When the plug is conically tapered, the stem/handle is typically attached to the larger diameter end of the plug. Plug valves usually do not ...

3. Stopcock - Wikipedia

   en.wikipedia.org/wiki/Stopcock

   One can also find valves with Teflon spindle (for example one way valves or angled valves) When the plug is made of glass, the handle and plug are fused together in one piece out of glass. When both valve body and plug are made of glass, a suitable grease (e.g. silicone grease or Ramsay grease ) is usually used to give a good seal, as well as ...

4. Fusible plug - Wikipedia

   en.wikipedia.org/wiki/Fusible_plug

   A fusible plug operates as a safety valve when dangerous temperatures, rather than dangerous pressures, are reached in a closed vessel. In steam boilers the fusible plug is screwed into the crown sheet (the top plate) of the firebox , typically extending about 1 in (25 mm) into the water space above it.

5. Isolation valve - Wikipedia

   en.wikipedia.org/wiki/Isolation_valve

   An isolation valve is a valve in a fluid handling system that stops the flow of process media to a given location, usually for maintenance or safety purposes. [1] They can also be used to provide flow logic (selecting one flow path versus another), and to connect external equipment to a system. [ 2 ]

6. Valve actuator - Wikipedia

   en.wikipedia.org/wiki/Valve_actuator

   The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...

7. How Germany outfitted half a million balconies with solar panels

   www.aol.com/germany-outfitted-half-million...

   The German government enacted the first technical regulations for plug-in solar devices in 2019, allowing balcony solar systems to use standard electrical plugs and feed into the grid.