Oxygen is an essential substance for sustaining life. Reliable and stable oxygen supply is indispensable for medical emergency treatment, industrial production, and daily health management. Within the supply chain of oxygen equipment, direct selling manufacturers act as a bridge linking technology and market demands. By shortening distribution channels and optimizing production workflows, they deliver cost effective oxygen solutions to the market. This article provides an in depth look at core knowledge in this sector from three dimensions: technical principles, industrial chain division of labour, and selection criteria.

The Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, requires stable, high-purity nitrogen gas as a process gas supply for its scientific research and experimental activities; this imposes stringent requirements on nitrogen purity, gas supply continuity, and equipment operational reliability. Following comprehensive research and evaluation, Huazhong University of Science and Technology selected Guangzhou Huilin Air Separation Equipment Co., Ltd. to procure a single WGSTD3956 nitrogen generation unit for ensuring a reliable gas supply for its laboratory research operations.

High-purity oxygen generator manufacturers are companies specializing in producing high-purity oxygen equipment using specific technological processes—such as pressure swing adsorption (PSA), membrane separation, or cryogenic distillation—whose products are widely used in medical, industrial, and aquaculture applications. The core competencies of these companies lie in gas separation technology, equipment reliability, and lifecycle cost management. Using a typical PSA oxygen generator manufacturer as a case study, this article examines its technical features, application examples, and key considerations for equipment selection, helping readers understand the operational logic of high-purity oxygen generator manufacturers.