If you want to increase the efficiency of centrifugal self-instructing pumps, use oil lubricated depressors and electro depressors. It can perform different operations in the building sector. Its nominal capacity is ?p = 1,5 bar. 38 m3/h, ?p = 2 bar. 22,5 m3/h and ?p = 2,5 bar. 21,7 m3/h with 4,0 Kw (~ 3 - 50Hz) motor power and 1450 PRM. You will get different accessories, including oil level switch and safety valve. The ATEX zone 1/2 is its special model.