国产三级按摩推拿按摩-色网站综合-xxxx少妇-超碰在线a-午夜寂寞影视在线观看-免费看91的网站-欧美特大特白屁股ass-91理论片午午伦夜理片久久-亚洲色成人网站www永久-又黄又爽的视频在线观看-久久视频这里只精品99-亚洲欧美日韩激情-成人看片17ccom-午夜少妇av-婷婷丁香综合

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.