Straight-through, right angle cast steel screw down vertical storm valve.

直通、直角铸钢可闭立式防浪阀；

youdao

Spring-actuated valve to be used on pump discharge. Swing check with outside lever and spring to be used on sump, sewage and storm drain lines.

弹簧执行机构止回阀用于管道排放。外置操作手柄和弹簧执行机构的旋启式止回阀用于污水坑、排污和雨水排泄管道。

youdao