This document specifies the terms and definitions, product specifications and working conditions, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and Storage, quality commitment. This document is applicable to equipment that uses compressed air to separate and produce oxygen from the air using molecular sieve pressure swing adsorption (PSA) at room temperature, with an oxygen production output of no more than 800 m3/h. Note 1: The oxygen production in this document is in the standard state, that is, the gas volume at 0 ℃, 0.101 325 MPa (absolute pressure), in cubic meters (m3). Note 2: Unless otherwise noted, pressure values are gauge pressure values.