Features of bellows seal valves:
●Double wall bellows seal as standard.
●Plug with marginal seat
●Bellows seal welded to bonnet
● Bellows seal 10,000 load cycles
● External stem thread
●Secondary sealing: gland packing(with bridge)
● Stem back seal
● Yoke gasket, double chambered
● Stem with roll hardened thread
Design standard: DIN 3356
Face to face dimension: DIN 3202
Flange ends: DIN 2543-2545
Test & inspection: DIN 3230
Application：Hot oil system, steam system, hot and cold water system etc.
Medium:Steam, gases, hot water, thermal oil, ammonia etc.
Materials : GG25(EN-GJL-250),GGG40,1.0619+N(GS-C25),1.4308(CF8), 1.4408(CF8M)
Materials of bellows: SS304, SS316, SS316L,SS 310S ,Hastelly C
Size range : DN15-DN400
Pressure : PN16-PN40
Temperature : ≤600 ℃