DIN F4 gate valve flange elastic seat NRS ductile iron specification DIN F4 German standard elastic seat sealing flange gate valve is mainly divided into NRS hidden stem and RS rising stem (OS&Y). The main material is ductile iron. 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. Rust resistant gate valves used in water supply and sewage treatment projects
NRS elastic sealing gate valve flange connection 
Size: 1 1/2 "-32" Main Material: Ductile Iron Valve Plate: Rubber lined Connection Method: Flange Operation Method: Manual, Electric
Flange standard: DIN PN10/PN16