1 - Body -Cast Iron - GG25 GGG40 GGG502 - Seat - Brass - UNI 50353 - Disc - Brass - UNI 50354 - Stem - Brass - UNI 5035Face to Face according to DIN3202-F4 DIN3202-F5Flanges as per DIN2532 DIN2533 EN1092gate valve manufacturers in China gate valve manufacturers in Chinacheck valve manufacturers check valve manufacturersball valve manufacturers in China ball valve manufacturers in Chinagate valves for sale gate valves for sale