... under room temperature, which is convenient, stable and economical PSA Oxygen Generator Specification Model NoBGPOCapacity2~240Nm3/hPurity93±3%Initial Pressure0.05~0 ... PSA principle. Under certain pressure, zeolite molecular sieve has different oxygen/nitrogen adsorption capacity, i.e. much more nitrogen adsorption ... extra purifying device for removing bacteria, dust and odor. PSA Oxygen Generator