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A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...
Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet. Built in November 1941 by American Locomotive Company (ALCO) in Schenectady, New York , it was assigned to haul heavy freight trains in the Wasatch mountain range .
Restricted speed (US) A speed not exceeding 20 mph which allows stopping within half the range of vision short of an obstruction on the tracks [210] [211] Rhino Nickname for HHP-8 electric locomotives used by Amtrak for Northeast Regional service [citation needed] Right way A "high nose" locomotive running with the long hood facing forward.
The Union Pacific FEF series consists of 45 4-8-4 "Northern" steam locomotives built by the American Locomotive Company (ALCO) between 1937 and 1944 and operated by the Union Pacific Railroad until 1959. Like the other Union Pacific steam classes, the acronym comes from the first letter of the spelling of its wheel arrangement: Four Eight Four.
The two-way check valve is a pneumatic device that has two inputs and one output; each input is connected to one these reservoirs. Only the air that is at the higher pressure is allowed to pass through to the check valve's output, which then passes through the tractor-protection valve, and then travels onward towards the trailer's air-tank and ...
Advertised by Fairbanks-Morse as "the most useful locomotive ever built" upon its introduction in 1953, the 2,400-horsepower (1.8 MW) H-24-66 Train Master was the most powerful single-engine diesel locomotive available at the time, legendary for its pulling power and rapid acceleration.
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