| Model | GP-231 | GP-281 | GP-451 | GP-561 | GP-631/681 |
| Pressure Ratio | 23:1 | 28:1 | 45:1 | 56:1 | 63:1/68:1 |
| Cycle/min | 60 | 60 | 50 | 50 | 50 |
| Fluidity/cycle(cc) | 28 | 60 | 250 | 220 | 193/179 |
| Fluidity/min(liter) | 1.7 | 3.6 | 12.5 | 11 | 11/8.9 |
| Max Pressure(bar) | 161 | 196 | 315 | 392 | 440/476 |
| Inlet Pressure(bar) | 3~7 | 3~7 | 3~7 | 3~7 | 3~7 |
| Stroke(mm) | 80 | 100 | 120 | 120 | 120 |
| Weight(kgs) | 37 | 42 | 114 | 118 | 140 |
| Size(cm) | 57X52X107 | 57X52X107 | 85X77X142 | 85X77X142 | 85X77X142 |
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