| Model | UN-1 | UN-3 | UN-10 | UN-16 | UN-25 | UN-40 | |
| Rated Input Capacity(KVA) | 1 | 3 | 10 | 16 | 25 | 40 | |
| Rated Duty Cycle(%) | 8 | 15 | 20 | 20 | 20 | 20 | |
| Primary Voltage(V) | 220 | 220 | 380 | 380 | 380 | 380 | |
| Rated Primary Current(A) | 4.5 | 13.6 | 26 | 42 | 66 | 105 | |
| Secondary No-load Voltage(V) | 0.65-2.0 | 1.55-3.0 | 1.65-2.4 | 1.98-3.01 | 2.25-3.53 | 3.1-5.2 | |
| Secondary Voltage Regulating Grades (grade) | 8 | 8 | -- | -- | -- | -- | |
| Secondary Voltage Rated Grades (grade) | 7 | 7 | -- | -- | -- | -- | |
| Maximum Forging Force(N) | 10 | 180 | 500 | 1000 | 1000 | 1000 | |
| Maximum Feed Stroke(mm) | 3 | 5 | 22 | 22 | 22 | 22 | |
| Maximum Distance Of Jaws(mm) | 7 | 10 | 10 | 16 | 16 | 16 | |
| Maximum Welding Diameter | low carbon steel | 0.6-2.0 | 1.0-5.0 | 3.0-8.0 | 3.5-10.0 | 5.0-12.0 | 6.0-14.0 |
| copper | 0.6-1.6 | 1.0-2.5 | 2.5-5.0 | 3.0-6.0 | 4.0-8.0 | 5.0-10.0 | |
| aluminum | 0.6-1.6 | 1.0-3.0 | 2.5-5.0 | 3.0-6.0 | 4.0-8.0 | 6.0-12.0 | |
| Dimensions(mm) | 265*265*310 | 350*250*800 | 400*300*1100 | 400*300*1100 | 400*300*1100 | 400*300*1100 | |
| Weight（KG） | 12 | 50 | 70 | 80 | 90 | 100 | |
