阀杆材质是符合美国材料试验协会ASTMB 371标准抗失锌现象的硅青铜，或B 99低锌合金，不含石棉的填料，和可锻或球墨铸铁手轮。
Stems shall be of dezincification-resistant silicon bronze ASTM B 371 or low-zinc alloy B 99, non-asbestos packing and malleable or ductile iron handwheel.
螺纹旋进式阀盖：通常用于轻型管道系统和小尺寸青铜多回转阀门中。
Threaded-in bonnet is common in lighter-duty services and smaller sizes of bronze multi-turn valves.
通常用作额定压力阀门的阀杆材料的硅青铜比普通黄铜具有更好的抗应力腐蚀裂纹的性能。
Commonly used as stem material in pressure-rated valves, silicon bronze has greater resistance to stress corrosion cracking than common brasses.
阀杆结构1） 明杆-内螺纹结构对于青铜多回转阀门来说是最通用、首选的结构形式。
Stem structure 1) stem - inside screw bronze multi-turn valves for the most common and preferred structure.
通用阀门主要有：青铜闸阀、青铜球阀、青铜截止阀、铸铁阀门等。
The universal valve includes bronze gate valve, bronze ball valve, bronze globe valve and cast iron valve etc.
铸青铜阀体和连接端口，防吹出硅青铜阀杆或316不锈钢球体和阀杆为选配件(66阀内件)。
Cast bronze body and end piece, blowout proof silicon bronze stem or 316 stainless steel ball and stem are optional (66 trim).
青铜阀瓣不需要阀瓣螺母。
青铜阀瓣不需要阀瓣螺母。
应用推荐