300W 系列金屬密封球閥采用超音速噴涂或熱噴焊工藝在球體表面和閥座密封面上噴涂碳化鎢/碳化鉻或噴焊鎳基合金，對其密封面進行硬化處理；再采用 KOSO *的研磨設備和技術研磨球和閥座，使其*密封，可達零泄漏。
研磨的球和閥座無縫隙*貼合形成面密封，既能防止雜質(zhì)進入密封面之間，動作時還能刮除黏附在球面上的異物，具備自清潔功能。
適用于高溫高壓，含有顆粒粉體及料漿類流體。
This series provides Zero-Leakage ball vavles in several service application with high temperature and/or high pressure.
The ball and seat are hard coated with chrome carbide or tungsten carbide or Metco 16C, which has high erosion and abrasion resistance. They are mate-lapped based on our own technique to ensure sealing. The ball never leaves the seat and wipes contaminants away. This self-cleaning action prevents the interference ａnd damage from contaminants.
Available for high temperature and pressure, containing particulates powders and slurries fluids services.
