午夜AⅤ不卡网站在线播放_尤物国产微拍精品一区91_大香蕉一区二区啪_成人精品福利午夜无码_你懂的中文字幕在线看_亚洲户外露脸在线观看_毛片大全网站_黄色激情小说另类av_色偷偷色噜噜狠狠网站种合_国产91午夜福利片

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.