... 2, modified PTFE sealing 3, the structure is argon arc welding 4, the material is brass Brief introduct:1, GBC type ball ... valve, and suitable for bi-directional flow.2, GBC type ball valve is used for liquid , suction ... valve seat and sealing place.4, GBC type ball valve is direct connection, it can provide ... the workng temperature is wide.5, GBC type ball valve is equipped with a secondary sealing cap ...