日韩欧美一二区_亚洲无码 鲁 鲁 更健康_国产美女一区三区_中文欧美日韩无线码_中文字幕亚洲激情_国产成人精品男人的天堂538_毛片影院在线观看_很黄很湿18以免费视频_国产乱子伦精品中文_过程网站在线观看黄

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.