乱人伦中文字幕-日本乱理伦片在线观看中文-色94色欧美sute亚洲线路二-久久成人亚洲香蕉草草-成人免费毛片网站-午夜亚洲国产-а天堂中文在线官网-麻豆人人妻人人妻人人片av-欧美亚洲精品真实在线-在线不卡国产-欧美精品网站-成人久久免费网站-911精品国产一区二区在线-成人做受视频试看120秒-91黄色看片

The opening and closing parts of the bevel gear globe valve are plug shaped disc, sealing surface is flat or conical surface, disc along the center line of the fluid for linear motion.The movement form of the valve stem, there are lifting rod type (stem up and down, handwheel does not rise and fall), there are also lifting rotary rod type (handwheel and valve stem rotate up and down together, nut is located on the valve body).Globe valves are suitable for full open and full close only. Adjustment and throttling are not allowed.API  globe valves mainly have API and ASME standard, ASTM, ASTM is the material standard, not the standard of the valve itself;Globe valves designed, manufactured, manufactured and tested according to American standards are called American standard globe valves.American standard globe valves and flanged globe valves are of the same type. The shutoff piece is a disc with the stem rotating about the center line of the body to open and close a valve.