For the selected media "Pirogallol" it's recommended to use the following seat materials: PTFE. As for the disk there can be applied such materails with some restrictions: stainless steel with molybdenum CF8M. Also in some cases there's a possibility to use rather stable seat materials, such as: stainless steel with molybdenum CF8M, aluminum-bronze.
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 | |||||
| - | - | C | - | B | B | |||||
| Seat material | ||||||||
|---|---|---|---|---|---|---|---|---|
| Concentration | EPDM | NBR | CR | Natural rubber | SILICONE | FKM (Viton) | FFKM | PTFE |
| - | - | - | - | - | - | - | - | A |
where: A - excellent, B - good, C - not recommended, * - inaccurate data