| Version A | Aqua Due to a high water vapour compatibility this version is used in applications with a high fraction of vapour. |
| Version D | Ex version Designed for applications in which explosive materials are conveyed according to directive 94/9/EG (ATEX) (Ex II 2 G IIB3 T4) |
| Version E | Enivac Designed for applications in which explosive materials are conveyed according to directive 94/9/EG (ATEX). Adapted for discharge of almost all substances of explosion group IIB3 as well as petrol vapour. |
| Version G | Especially designed for permanent operation in rough vacuum |
| Version K | KB Version Compact design especially developed for machines and systems with a small amount of space |
| Version S | Oxygen version Special version designed for the discharge of oxygen |