日韩免费视频-欧美在线一区二区三区-天天激情-草久在线-日本做受-男人操女人免费视频-国产精品美女在线-99色网-美女av片-色屁屁草草影院ccyycom-91精品推荐-天天插综合网-欧美第一页在线-亚洲精品污一区二区三区-大奶一区二区-h在线网站-高h喷水荡肉爽文np肉色视频-一级做a爰片-少妇被中出-久久久久人妻一区-香蕉a视频-国产又爽又猛又粗的视频a片-亚洲第一成年网-久久久精品波多野结衣-爱爱视频一区

WJ11F API Internal Thread Bellows Globe Valve main structural features:
1, the product structure is reasonable, reliable sealing, excellent performance, handsome in appearance; 
2, sealing surface surfacing Co hard alloy, wear resistance, corrosion resistance, good abrasion resistance, long life ; 
3, stem quenching and nitriding surface treatment, good corrosion and abrasion resistance; 
4, double sealing, more reliable performance; 
5, stem lift position instructions more intuitive. 

Advantages of WJ11F API Internal Thread Bellows Globe Valve:

1, double seal design (bellows + packing) If the bellows failure, stem packing will also avoid leakage, and in line with international standards for sealing. 
2, safety and environmental protection, no fluid loss, reduce energy losses, improve plant equipment safety. 
3, long service life, reduce the number of maintenance, reduce operating costs. 
4, rugged bellows seal design to ensure zero stem leakage, providing maintenance-free conditions.