The industry involves: 

 Atmospheric decompression, hydrogenation, coking, reforming, sulfur recovery, etc. in petroleum, petrochemical, refined chemicals, ethylene, fine chemicals, refining and refining industries. 

 Application product type: 

 Medium/high-pressure regulator; medium/high-pressure cut-off ball valve; axial flow multi-stage pressure-relief regulator; maze multi-stage pressure-relief regulator; multi-layer sleeve multi-stage pressure-relief regulator; eccentric rotary regulator; gate valve; three-eccentric butterfly valve, etc., lined plastic-plastic cut-off valve.