Number of chain nodes M = 0.105×-113 (× means the distance of lead screw center from surface); use hand wheel if the height is less than 1.7 m; use chain wheel if the height is more than 1.7 m.
LMD-双向
LMD two-way
Ⅱ-链条
II chain
注:可来图来样定作非标的螺旋闸门 注:可来图来样定作非标的螺旋闸门 Note: Non-standard screw gate valve could be customized based on drawing or sample.