API509 Cast & Ductile Iron Lug Butterfly Valve Conform to API 509, DIN 3202.
They are tested according to API 598, and marked as per MSS SP-25.
1. Construction is as follows:
| - Concentric Type |
| - Single Type Body |
| - Soft Seated |
| - Double Half Stem |
| - Through Stem With Pin |
| - Uni-direction or Bi-direction |
| - Flanged Ends to ASME B16.5 |
| - Wafer or Lug Suit to Flanged(ASME B16.5 or B16.47) |
2. Main Part & Materials
| Part Names | Part Materials |
| Body | Cast Iron | Ductile Iron |
| A126 B | GG25 | FC 20 | A536 | A395 | GGG40 | GGG50 |
| Disc | Ductile Iorn/CF8/CF8M/CF3/CF3M/Alum-Bronze |
| Stem | SS410/SS420/SS416/SS304/SS316/Monel |
| Seat/Seat Ring | NBR/EPDM/PTFE |
| Packing | Graphite/PTFE |
| Gasket | SS304+Graphite/SS304+Graphite |
| Suitable Medium | Water, Waste Water, Sewage |
| Suitable Temperature | -29~150 °C |
| | | | | | | | |
3. Normal Pressure Rating
PN6~PN16, CLASS150
4. Normal Size Range
DN50~DN1400, 2"~56"