The valve body casting Taiwan, the introduction of advanced technology, reasonable structure, beautiful shape. Valve seat with elastic sealing structure, reliable sealing, open and close easily. The stem to the the back seal Bottoms structure, abnormal pressure of the valve chamber, the valve stem will not be impacted. Can be set to 90 ° the switch positioning mechanism, based on the need to lock to prevent misuse. Connection: threaded, flanged, wafer, welding; nominal diameter: DN15-500mm; nominal pressure: PN1.0 ~ 4.0MPa Operating Temperature -29 to 180 ° C (seals PTFE) or - 29 to 300 ° C (the ring RPTFE) various pipeline; Suitable medium: water, steam, oil, nitric acid, acetic acid, ammonia salt, and water and other media. Body material: carbon steel, cast steel, 304,316,316 L stainless steel;