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2. Kingston valve - Wikipedia

   en.wikipedia.org/wiki/Kingston_valve

   Main ballast tanks are in pairs, one on each side of the boat. One Kingston valve serves a pair, but each tank has a vent riser, with air connections and stop valves in the vent riser. The tank bottom is open to the sea through flood ports. The trapped air in the tank provides positive buoyancy while on the surface, although sea water sloshing ...

3. Onboard refueling vapor recovery - Wikipedia

   en.wikipedia.org/wiki/Onboard_refueling_vapor...

   An onboard refueling vapor recovery system (ORVR) is a vehicle fuel vapor emission control system that captures volatile organic compounds (VOC, potentially harmful vapors) during refueling. [1][page needed] There are two types of vehicle fuel vapor emission control systems: the ORVR, and the Stage II vapor recovery system. [2]

4. Vent (submarine) - Wikipedia

   en.wikipedia.org/wiki/Vent_(submarine)

   The vents of the Redoutable are under the casing. The square openings in the casing are limber holes to facilitate draining the superstructure. In submarine technology a vent is a valve fitted to the top of a submarine's ballast tanks to let air escape from the top of the ballast tank and be replaced by water entering through the opening(s) called "flood ports" or "floods" at the bottom of the ...

5. Saddle tank (submarine) - Wikipedia

   en.wikipedia.org/wiki/Saddle_tank_(submarine)

   For compactness the ballast tanks were wrapped around the batteries, low down and sharing the flat surfaces of the battery tank. [1] The Kingston valves linking the ballast tanks to the sea could be left open, a practice known as "riding the valves", and the water level in the tanks controlled solely by the vent and blowing air valves. The ...

6. Crankcase ventilation system - Wikipedia

   en.wikipedia.org/wiki/Crankcase_ventilation_system

   Crankcase ventilation system. A crankcase ventilation system (CVS) removes unwanted gases from the crankcase of an internal combustion engine. The system usually consists of a tube, a one-way valve and a vacuum source (such as the inlet manifold). The unwanted gases, called "blow-by", are gases from the combustion chamber which have leaked past ...

7. Space Shuttle external tank - Wikipedia

   en.wikipedia.org/wiki/Space_Shuttle_external_tank

   The Space Shuttle external tank (ET) was the component of the Space Shuttle launch vehicle that contained the liquid hydrogen fuel and liquid oxygen oxidizer. During lift-off and ascent it supplied the fuel and oxidizer under pressure to the three RS-25 main engines in the orbiter. The ET was jettisoned just over 10 seconds after main engine ...