Book excerpt: A survey of leak-free centrifugal and positive displacement pumps -- Properties and design criteria for magnetic drives on pumps -- Zero-leakage pumps equipped with permanent magnetic drive -- Leak-free centrifugal pumps in plastic -- Canned-motor pumps : an important contribution to leakage-free operation -- Standardized chemical pump with canned motor in flameproof enclosures -- Canned motor and magnetic drive systems : a comparison -- Reciprocating metering pumps in leak-free design -- Leakage-free metering of fluids in fully automated processes -- Process diaphragm pumps -- Diaphragm compressors -- Liquid ring vacuum pumps and compressors with magnetic drive -- Leak-proof Roots vacuum pumps.