Assertion: snorkel's valve | /r/CapableOf | open small amount of air
Facets:
Source sentences:
text: The cross-sectional area of all or a portion of the exhaust tube 15 is selected so that during normal relaxed exhaling, air pressure does not increase sufficiently in the hollow chamber 28 to open the purge valve 40, however when air is exhaled with more force than normal, as in a short cough, air pressure rises in the chamber 28 that causes the purge valve 40 to open and release a small amount of air and any accumulated water.
text: The cross-sectional area of all or a portion of the exhaust tube 15 is selected so that during normal relaxed exhaling, air pressure does not increase sufficiently in the hollow chamber 28 to open the purge valve 40, however when air is exhaled with more force than normal, as in a short cough, air pressure rises in the chamber 28 that causes the purge valve 40 to open and release a small amount of air and any accumulated water.