Description: amount of gaseous substance in the liquid to be transported in the pump; Name: content of gas
Description: proportion of gaseous substance in the liquid to be pumped, either as a contaminant or as vapour from the main body of liquid; Name: gas content
Description: amount of the absolute value of the total head above the head, equivalent to the vapour pressure of the liquid at the particular temperature, with reference to the NPSH datum plane; Name: net positive suction head