workpiece through hot, such as: high strength bolt, nut, auto parts, hardware tools, rigging, the hot upsetting of hot-rolled twist drill and so on, The longer of the workpiece’s diameter, the lower of the frequency .Such as: Φ4 mm and the following was applicable to the high frequency, UHF (100-500KHz) Φ4-16 mm applies to the high-frequency (50-100 KHz) Φ16-40 mm applies to VHF (10-50 KHz) Φ40 mm more than the application of intermediate frequency (0.5-10 KHz) 1，Small size, light weight, simple installation, operation is very convenient; 2, high efficiency, energy saving is very clear that energy-saving than traditional high-frequency equipment 60%, saving 20% compared with SCR-IF; 3, safe and reliable, no million-volt high-pressure, pairs of operators is very safe; almost no oxide layer, there is no gas and has no waste water produced. 4, frequency bandwidth, to meet pre-heating of different parts of the forging, heat treatment, brazing, etc.; 5, a unique cooling circulation system, ensure that the equipment 24 hours of continuous work. 6, the variety is complete, with high-frequency, ultra-high frequency series, power (KW) have 16,36,50,60,80,120. 160 260，360series.