Adopted the NEMA standard Power from 0.55 to 1.5 kw(single phase ) Power from 1.1 to 1.5 kw (Three phase) Insulation class:B Protection grade:IP58 Maximum diametre :100mm Highest temperature of liquid:40 centigrade Type Power Capacity(m3/h) Head(m) 4SNM304-0.55 0.55kw 0.75hp 3 28 4SNM305-0.75 0.75kw 1hp 3 42 4SNM308-1.1 1.1kw 1.5hp 3 56 4SNM310-1.5 1.5kw 2hp 3 70 4SNM311-1.5 1.5kw 2hp 3 77 Voltage:220V