HI 10.1-10.5 – American National Standard for Air-Operated Pumps for Nomenclature, Definitions, Application, and Operation
This standard applies to air-operated diaphragm and bellows pumps. An air-operated pump is a positive-displacement reciprocating pump used for general liquid transfer. It is driven by means of a compressed gas (usually air) from an outside source. Where air is used throughout this document, it should be taken to mean any compressed gas, but usually air.