This document specifies in detail the conditions of use, performance parameters, technical requirements, design and structure, test methods, spare parts, Encasement, transportation, storage, operation, maintenance and safety of the sulfur hexafluoride (SF6) gas recovery device. This device is mainly used for the recovery, purification and storage of SF6 gas, and at the same time has the function of vacuuming and filling the gas chamber of electrical equipment with SF6 gas. It is suitable for SF6 gas recovery devices that adopt the working principle of high voltage liquefaction and refrigerated liquefaction. A series of related documents are referenced in the standard, including standards and specifications for Pressure Vessel, Encasement logo, acoustic measurement, high voltage switchgear, etc. In addition, terms such as "purge" are defined in the standard to ensure the accuracy and conformity of documents.