What is the types of sump pump stations? how its work?

Dear Sharif.

1- Consider the amount of inlet flow to the sump

2- Get effluent of sump into consideration

3- Be aware about start/stop of pumps and prevent small time intervals according to manufacturer suggestion.

4- Define number of pumps according to items1 to3 and sump dimension with a glance to service area.

5- Considering one pump as stand by is recommended. For example if you calculated two pump of50% flow, then consider3 pump of50% flow.

1.(Simplex) one pump normally runs and the second kicks in only if the effluent level rises above a failsafe point.

2.(Duplex) two pumps alternate, taking turns running - spreading the wear over two pumps and you'll know when one fails and have a chance to repair it.

Sump pumps are mainly used in case of lack the of gravity to carry out unwanted liquids. Pumps are adding head to carry out these liquids away and throw them to the nearest drain point. Flow could be one phase or two phase flow. In case of two phase flow, it could be required to use a grinding impeller. They are mostly used in below zero levels of the building. For example, basements.

all i know submersible pump used in :

1-water purification company (to get water from the nile to the purifcation tank)

2-i basements we use that pump to left  the sewage up to ground level (manhole).

3-in a project a submersible pump was in an entombed diesel tank.

you may find this PDFs helpful:

 http://www.ihs.gov/EHSCT/documents/sfc_webinar_docs/2013-Pump%20Sizing%20With%20Exercises%20r1.pdf

and

http://www.wellpumps.eu/data/acms/docs/products/1_catalogus_50_hz.pdf