Pump removes liquid seepage from small, restricted area and against large pressure head. Developed for moving small amounts of water and oil from sump pit 85 ft (25.91 m) deep. Fits in space only 6 1/2 in. (16.5 cm) in diameter and 18 in. (45.7 cm) long. In discharge part of pumping cycle, air forces liquid out of pump chamber through pipe. During filling part of pumping cycle, water enters pump chamber from sump pit. Float in chamber next to pump chamber controls pressurization through timer and solenoid valve.
Air-Operated Sump Pump
NASA Tech Briefs ; 12 , 9
1988-10-01
Miscellaneous
No indication
English
NTIS | 1983
|Sump pump for process industries
Online Contents | 2003
Sump pump allows run-dry operation
Online Contents | 2010
Control system for sump pump duties
Online Contents | 2010
Online Contents | 2009