suction valve

British  

noun

1. Also called: foot valve.  a nonreturn valve in a pump suction to prevent the pump draining or depriming when not in service

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Example Sentences

When the plunger stops, the suction valve will fall back to its seat and enclose the water in the pump; but as soon as the plunger moves back to the left hand and enters the barrel pump further, the delivery valve will rise, and the plunger will expel from the pump a body of air or water equal in volume to the cubical contents of the plunger, or rather of that part of it that is within the barrel, and displaces water.

From Project Gutenberg

Thus, while the suction valve is falling to its seat, the water already in the pump passes back into the suction pipe, and similarly, while the delivery valve is closing, the delivery water passes back.

From Project Gutenberg

A foot valve is virtually a second suction valve placed at the bottom or foot of the suction pipe.

From Project Gutenberg

From the suction valve sticking or being choked, or from the delivery valve being choked and not seating itself, thus either letting the suction water pass back into the hot well, or the delivery water pass back into the pump. 2d.

From Project Gutenberg

Determination of the Resistance to Suction and Exhaust.—Influence of the tension of the spring of the suction valve and of the section of the pipe.

From Project Gutenberg