Horizontal centrifugal pumps with magnetic drive for suction head installment and self-priming versions with built-in tank. These pumps are compact and easy to maintain, because without mechanical seal. The head consists of three sealing pieces. The magnetic field causes the rotation without any contact between the external and internal parts, eliminating any risk of loss of liquid. Wide range of flow-rates from 2.5 to 1,400 l/min with head up to 88 m. These pumps are made of acid-resistant plastic materials such as PP, PPS, ETFE and PVDF. These materials allow to pump all commercial diluted acids or highly concentrated ones, even pure: hypochlorite, hydrochloric acid, sulfuric acid, nitric acid, chromic acid, phosphates, etc ...