scope:

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.

Air-operated rotodynamic and rotary pumps are not included in this standard.

Purpose

The purpose of this standard is to define common terminology, provide education, and prevent misunderstandings between manufacturers, purchasers, and users of air-operated pumps. The standard can assist purchasers in the selection and acquisition of an appropriate pump for their needs. The standard can also assist pump users to operate their pumps in an efficient and trouble-free manner and avoid common mistakes.