Longtai is a high-tech company specializing in the production and research and development of electric heaters, automated temperature control equipment, and other products.
| Model | ZWK-I-60KW |
| Temperature Control Points | 3 points |
| Recording Points | 3 points |
| Temperature Control Range | 0-1000℃ |
| Temperature Control Accuracy | ±1℃ |
| Input Voltage | 380V (Three-phase Four-wire) |
| Output Voltage | 220V |
| Maximum Power | 60KW (Max. 20KW per circuit) |
| Protection Grade | IP44 |
![]() LWK Series |
![]() ZWK-I Series |
![]() ZWK-II Series |
| 2/3-wire System | Three-phase Four-wire System | Three-phase Four-wire System |
| No Recorder | Equipped with Recorder | Equipped with Recorder |
| Optional PID Programming | Built-in PID Programming | Built-in PID Programming |
| Manual heating, constant temperature & cooling
(Automatic heating available as an option) |
Automatic heating, constant temperature & cooling | Automatic heating, constant temperature & cooling |
| Temperature control accuracy: ±1℃ or ±5℃ | Temperature control accuracy: ±1℃ | Temperature control accuracy: ±1℃ |
| Optional voltage & power regulation | No voltage & power regulation | No voltage & power regulation |
| Entry-level | Professional-grade | Professional-grade |
| Suitable for small-scale pre-weld preheating and post-weld heat treatment | Suitable for all pre/post-weld constant temperature, stress relief, hardness reduction, annealing and tempering heat treatment | Suitable for all pre/post-weld constant temperature, stress relief, hardness reduction, annealing and tempering heat treatment |