| Study on Air Tightness of Several Rubber Materials on New Insulating Gas C4F7N and CO2 |
| Received:November 07, 2019 Revised:November 07, 2019 |
| DOI：10.12136/j.issn.1000-890X.2022.03.0169 |
| Key Words: insulating gas；C4F7N；CO2；air tightness；EPDM；NBR；FKM |
| Author Name | Affiliation | E-mail | | ZHANG Yaru | Electric Power Test and Research Institute，Guangzhou Power Supply Bureau of Guangdong Power Grid Co.，Ltd | | | LIU JING* | Electric Power Test and Research Institute，Guangzhou Power Supply Bureau of Guangdong Power Grid Co.，Ltd | greengasguangzhou@163.com | | HUANG Qingdan | Electric Power Test and Research Institute，Guangzhou Power Supply Bureau of Guangdong Power Grid Co.，Ltd | | | WANG Yong | Electric Power Test and Research Institute，Guangzhou Power Supply Bureau of Guangdong Power Grid Co.，Ltd | | | ZENG Lian | Electric Power Test and Research Institute，Guangzhou Power Supply Bureau of Guangdong Power Grid Co.，Ltd | |
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| Abstract: |
| By a self-assembled air tightness test system based on gas chromatography-mass spectrometry，the air tightness of ethylene propylene diene rubber（EPDM），nitrile rubber（NBR）and fluororubber（FKM） to the new insulating gas perfluoroisobutyronitrile（C4F7N） and its equilibrium gas carbon dioxide（CO2） were tested respectively.The results showed that，FKM had high inertia and stability to C4F7N and CO2，dense microstructure and small specific surface area，its air tightness was significantly better than EPDM and NBR，and it was more suitable as sealing material for equipment using C4F7N and CO2 as insulating gas. |
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