Operation and maintenance of valves in air separation equipment:
1、 Low temperature valves, valves on oxygen pipelines, and valves in contact with oxygen media must be free of oil, grease, and any other impurities. When using, maintaining, and repairing these valves, special attention should be paid to ensuring that they are not contaminated with flammable materials such as oil, grease, and wax. If they come into contact with oil, grease, etc., degreasing treatment should be carried out.
2、 Valve gaskets, sealing packing, and sealing rings must also be oil-free and grease free, and must be made of non combustible materials suitable for oxygen valves. The use of oil immersed wax and combustible materials is strictly prohibited.
3、 The visible surface of the valve stem must be kept clean, and the surface of the valve stem should be regularly coated with a lubricant suitable for oxygen valves.
4、 Check the leakage of the valve.
5、 Low temperature valves, oxygen pipelines, and valves in contact with oxygen media must be cleaned and strictly degreased before installation. The solvents used for cleaning and degreasing must also be free of oil, grease, and any other impurities, and decomposed solutions are not allowed to be used. During valve installation, all solid substances such as slag, iron oxide scale, rust, welding slag, explosives (including grease, preservatives, etc.) must be removed from all valve installation locations.
For detailed management and maintenance requirements for valves and specialized valves, please refer to the relevant valve maintenance manual for details.
