NKV 1, 2, 3, 4 are AISI 304 stainless steel multi-impeller vertical centrifugal pumps with coupling; designed for pressurization and heating circulation in civil and commercial environments, they can also be used in agriculture and in watering systems. All models with NKV 10, 15, 20 S have the parts in contact with the liquid in AISI 304 stainless steel. The models with NKVE 32, 45 have the pump body and upper flange in cataphorized cast iron. The impellers, diffusers and pump casing are in AISI 304 stainless steel. One protection group per units. Delivery check valve, pressure transmitter and expansion vessel for each pump. On request, X version with materials in contact with water in stainless steel AISI 316. The groups are supplied assembled, set and tested directly at the factory. IE3 electric motors.