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Select the metering pump according to the following criteria: l Flow rate and pressure l Type of medium l Operating environment. Flow rate and pressure – the combination of these two factors determines the required power level, which has a direct impact on the selection of the metering pump. Properties of the fluid to be transported – Several factors that have an impact: viscosity. When the viscosity is greater than 50 centipoise, the fluid being pumped can sometimes become a constraint in choosing a metering pump; high viscosity reduces the flow rate, and it may be necessary to use auxiliary check valves or special check valves. l Charged and uncharged: Charged media, especially abrasive ones, affect the choice of the hydraulic end; the type of diaphragm in the pump head should match the properties of the plunger. l Temperature: Standard metering pumps are capable of transporting fluids at temperatures ranging from -10°C to +50°C (+90°C), depending on the type of pump. With the addition of special designs, the MILROYAL / MAXROYAL series can generally be used in temperatures ranging from -36°C to +250°C. l Chemical resistance of the hydraulic end: The material used for the hydraulic end is selected based on the temperature and concentration of the medium, by referring to material corrosion tables. Density, steam pressure, and net positive suction head: Other factors to consider are density and steam pressure; when these values are used in formulas to calculate the net positive suction head, it can be seen that they sometimes influence the choice of pump. Operating environment: Special applications under specific conditions: When used in hazardous environments (radiation, corrosion, explosivity, hydrogen sulfide, etc.) or under extreme climate conditions (temperature, sandstorms, humidity, etc.), the choice of metering pump should lean towards the \"process pump\" series, such as MAXROY, MROY, MILROYAL, MAXROYAL, PRIMEROYAL.