factory direct pneumatic knife gate valve pneumatic knife gate

stem sluice din f4 soft seated epdm wedge flanged gate valve

6a standard 410 4130 material expanding k-shape wkm gate valve

flange end stainless steel gate valve

游泳池配件 3通阀 快速连接件pool accessories gate valve

compression brass gate valve

cast iron gate valve din/bs standard dn50-dn1000/pn10-pn25

gate valve / for gas / with butt weld ends 3004

api 6a demco gate valve