| No. cylinders | 2 | |
| Bore | 34 | [mm] |
| Stroke | 28 | [mm] |
| Displacement @ 50 Hz | 4,42 | [m³/h] |
| Displacement @ 60 Hz | 5,30 | [m³/h] |
| Suction valve | 12 s. | [mm] |
| Discharge valve | 12 s. | [mm] |
| Oil charge | 1,0 | [L] |
| Net weight | 35 | [kg] |
HEX51CS
| No. cylinders | 2 | |
| Bore | 34 | [mm] |
| Stroke | 28 | [mm] |
| Displacement @ 50 Hz | 4,42 | [m³/h] |
| Displacement @ 60 Hz | 5,30 | [m³/h] |
| Suction valve | 12 s. | [mm] |
| Discharge valve | 12 s. | [mm] |
| Oil charge | 1,0 | [L] |
| Net weight | 35 | [kg] |