水封截止阀可分为法兰式[DSJ41H]和焊接式[DSJ61H]的两种。DS系列水封阀门适用于公称压力≤160MPa，工作温度≤400℃或≤550℃，工作介质为水蒸汽油品和非腐蚀性气体的管路上作启闭装置用．尤其适用于火电厂汽机真空冷凝系统。有截止阀和闸阀两种形式。

上海唐京阀门有限公司截止阀类主要产品有: [节流阀]、[高压节流阀]、[截止节流平衡阀]、[J41T、J41W铸铁截止阀]、[J41H铸钢截止阀]、 [J41W不锈钢截止阀]、[J41Y-100I铬钼钢截止阀]、[J41W-16T黄铜截止阀]、[J41F-6S、J11F-6S塑料截止阀]、[锻钢截止阀]、[法兰截止阀]、[焊接式截止阀]、[内螺纹截止阀]、[J61Y-P54/170V高温高压截止阀]、[J941H、J961Y]电动截止阀、[J441H正齿轮传动截止阀]、[J541H伞齿传动轮截止阀]、[BJ41H、BJ45H保温截止阀]、[J41Y/J61Y高温截止阀]、[J41H、J61H高压截止阀]、 [J45/J65Y直流式截止阀、Y形截止阀]、[J41、J61自密封高压截止阀]、[WJ41H、WJ44H、WJ45H、WJ61H、WJ11H波纹管截止阀]、[JY41W氧气截止阀]、[NKJ41H、NKJ44H、NKJ61真空隔离截止阀]、[DSJ41H、DSJ61H水封截止阀]、[J41B、J42B、J61B、J21B、J11B氨用截止阀]、[J44、J64角式截止阀]、[J41F4、J45F4衬氟截止阀]、[J41J、J45J衬胶截止阀]、 [J41N液化石油气截止阀、天燃气截止阀、煤气截止阀]、[DJ41W、DJ61W低温截止阀]、[J41H撞击式截止阀]。[WJ41H、J41H蒸汽截止阀]。[YJ41F抗生素截止阀]、 [FJ41Y节流截止放空阀]。[TPJ41Y节流截止排污阀]。