Materials:
Body: cast steel (1.0619 or GP240GH) and stainless steel
Stem: X20Cr13 or 1.4021 and stainless
Disc: C22.8 or 18Cr(F304)
Seat: 18Cr stainless steel satellite
Bellows: SS304 or SS316L 1.4571
Size: DIN 15 or 400
Pressure: PN10 to 40
Standards:
Design: EN13709 and EN12516
Face to face: EN558-1 and EN12982
Flanges: EN1092-1
Welded ends: EN12627
Pressure test: EN 12266-1