For the selected media "Sulfuric acid" it's recommended to use the following disk materials: stainless steel with molybdenum CF8M, and the following seats materials: stainless steel with molybdenum CF8M, Viton, PTFE. Also in some cases it's allowed to use rather stable seat materials: EPDM, NBR.
You can choose the butterfly valves of PromArm manufacturing from our catalog.
| Disk material | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Concentration | Ductile iron | Carbon steel | stainless steel CF8 | stainless steel CF8M | Aluminum-bronze | |||||
| <30% | C | C | C | A | C | |||||
| 50% | C | C | C | A | C | |||||
| 70% | C | C | C | B | C | |||||
| 90% | C | C | C | C | C | |||||
| 100% | C | C | C | C | C | |||||
| Fuming | C | C | C | C | C | |||||
| Seat material | ||||||||
|---|---|---|---|---|---|---|---|---|
| Concentration | EPDM | NBR | CR | Natural rubber | SILICONE | FKM (Viton) | FFKM | PTFE |
| <30% | B | B | C | C | C | A | A | A |
| 50% | B | C | C | C | C | A | A | A |
| 70% | B | B | C | C | C | A | A | A |
| 90% | C | C | C | C | C | A | A | A |
| 100% | C | C | C | C | C | A | A | A |
| Fuming | B | C | C | C | C | A | A | A |
where: A - excellent, B - good, C - not recommended, * - inaccurate data