Gate valve

DIN F4 gate valve flange elastic seat NRS ductile iron specification

DIN F4 gate valve flange elastic seat NRS ductile iron, DIN F4 German standard elastic seat seal flange gate valve is mainly divided into NRS hidden stem and RS rising stem (OS&Y), and the main material is ductile iron GGG40. When the entire encapsulated valve plate is closed, the deformation compensation effect achieves a good sealing effect, overcoming the problems of poor sealing and water leakage of general gate valves. It is used as a soft seal flange connected gate valve for water supply and sewage treatment projects.