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2. Thermal expansion valve - Wikipedia

   en.wikipedia.org/wiki/Thermal_expansion_valve

   The equalisation connection is needed when the pressure at the sensing position differs from the pressure at the valve output. A thermal expansion valve or thermostatic expansion valve (often abbreviated as TEV, TXV, or TX valve) is a component in vapor-compression refrigeration and air conditioning systems that controls the amount of ...

3. Expansion valve (steam engine) - Wikipedia

   en.wikipedia.org/wiki/Expansion_valve_(steam_engine)

   Cross compound engine, with an expansion valve (top) on the high-pressure cylinder. An expansion valve is a device in steam engine valve gear that improves engine efficiency. It operates by closing off the supply of steam early, before the piston has travelled through its full stroke.

4. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   Similar to a sliding line blind valve, but the latter is for higher-pressure applications; Slide valve: used in early steam engines to control admission and emission of steam from the piston; Stopcock: restricts or isolates flow through a pipe; Swirl valve: a specially designed Joule–Thomson pressure reduction/expansion valve imparting a ...

5. Expansion tank - Wikipedia

   en.wikipedia.org/wiki/Expansion_tank

   An expansion tank or expansion vessel is a small tank used to protect closed water heating systems and domestic hot water systems from excessive pressure. The tank is partially filled with air, whose compressibility cushions shock caused by water hammer [ citation needed ] and absorbs excess water pressure caused by thermal expansion .

6. Expansion valve - Wikipedia

   en.wikipedia.org/wiki/Expansion_valve

   An expansion valve is a valve used for different purposes: Steam engines. A valve used to control the expansion of steam: Expansion valve (steam engine)

7. Compound steam engine - Wikipedia

   en.wikipedia.org/wiki/Compound_steam_engine

   Double-acting triple-expansion marine engine. High-pressure steam (red) passes through three stages, exhausting as low-pressure steam (blue) to the condenser. It is a logical extension of the compound engine (described above) to split the expansion into yet more stages to increase efficiency. The result is the multiple-expansion engine.