| FFPM | Perfluorinated rubber or elastomer (Kalrez TM,…) Contains higher amounts of fluorine than standard FKM, Resist to a broad range of aggresive chemicals, like concentrated nitric acid, sodium hydroxide, ethylene diamine and steam. It doesn’t resist good to fluorated compounds like freon. |
| FPM | Fluorinated rubber or elastomer (Viton TM) |
| mWs | Water column height in m |
| PA | Polyamide (Nylon) |
| PP | Polypropylene |
| PTFE | Polytetrafluorethylene (Teflon) |
| PVDF | Polyvinylidenfluorid |
