... coating,without dead space, low weight, Summary: Knife gate valve is designed with a U resilient sealing ... stem nut go up and down indicating the position of valves operation; U resilient sealing part, ... dimension, low weight.Function: cut off or regulate the flow of all kinds of media: big granule, ... , suspending sludge and so on. Upon request, the gate valves can be actuated by operating lever, hand ...