FNQ611F Threaded ball valve and welded connections into the overall style, two-stage and three stages. Valve body casting by Germany to introduce advanced technology, reasonable structure, beautiful modeling. Structure of the elastic sealing seat, open and close easily, reliable seal. Valve stem seal downloading inverted structure, when an abnormal pressure valve chamber, valve stem will not be hit. Can be set to 90 ° switch positioning mechanism, locking needed to prevent misuse. Threaded ball valve and welded connections for PN1.0 ~ 4.0MPa, working temperature -29 ~ 180 ℃ (PTFE seals to enhance) or -29 ~ 300 ℃ (ring for the accumulation of bits benzene) of the various pipeline, the pipeline used to cut off or connected to the media, the choice of different materials, can be separately applied to water, steam, oil, nitric acid, acetic acid, ammonium salt, and water in a variety of media .