Safety and economy are not mutually exclusive! However, a number of factors must be taken into account when choosing a pump for an optimal result: ammonia, CO2, hydrocarbons, water-glycol – what influence do the refrigerant properties have? Which pump is best for which natural refrigerant? And what are the advantages and disadvantages in terms of maintenance cycles and failure rates? In order to make processes with centrifugal pumps safe and economical at the same time, it is important to keep an eye on a number of influencing factors.