DIN resilient seat non rising stem gate valve F4/F5
Main parts and materials:
Body,bonnet::Ductile iron
Disc:Ductile iron
Stem:Stainless steel
Standards
Design and manufacture:DIN3352
Face to face:DIN3202/ISO5752
Flange end:DIN2501/GB-17241
Inspection:DIN3230/JB-T9092