Applidations:
·It is developed based on the several proprietary technology, and has the characteristics of full head (i.e. from zero to max head) and reliable usage, which has conquered the congenital disadvantage of general sub-motor-pumps in low head situation caused ty overload-led burning down of electric machine.

Features:
·It is featured by four merits that is high average efficiency, broad high efficient area, light weight, large proportion etc. Also, it does excellent in energy saving economy and social benefit.