lift station engineering
lift station engineering
(OP)
I have a lift station in service 3 yrs, it begins to read negative flow meter readings after a big rain. The vault with the mag meter was wet so i called my meter guy, waiting for him 3 days later. One pump sheared the shaft.between the time i called to have the pump pulled the other pump shaft sheared, rented aux pump in. i have asked hydromatic , the designers and the installers and we are all stumped..ok they are 40 hp pumps .a 1200ft. force main run and a 50ft. rise to a 100 ft drop and and gravity to the other end.there is a pressure relief valves 25 ft. from the lift station that works and one at the top of the rise and run that i cant find...the check valves have been shown to be working..thoughts would be appreciated. Thanks.





RE: lift station engineering
Steve
RE: lift station engineering
It is unlikely that the pump is running backward, especially with the check valves, and even if it is, running backwards would not cause the shaft to break.
RE: lift station engineering
Regards,
Lyle