The leading cause of IGBT failure and coil burnout is inadequate cooling. Our closed-loop system protects your investment with automatic temperature and flow control.
Without sufficient cooling, IGBT junction temperatures spike above 125ยฐC โ causing immediate module failure. One failed module can cost $500โ$3,000 and days of downtime.
Open-loop city water deposits calcium and mineral scale inside coils and heat exchangers, gradually restricting flow until a catastrophic overheat occurs.
Fluctuating city water pressure causes inconsistent cooling โ some components run too hot while others are over-cooled. Both scenarios shorten equipment life.
Standard open-loop systems have no flow or temperature alarms. By the time operators notice a problem, the damage is already done.
YuRun's Closed-Loop Cooling Water System is a complete, standalone cooling solution specifically engineered for induction melting furnaces. Unlike open-loop city water systems that introduce mineral scale and pressure fluctuations, our closed-loop system circulates treated, soft water through your IGBT cabinet, power supply, and furnace coil โ and then through an air-cooled radiator tower to dissipate heat.
The system includes automatic temperature control (setpoint-based fan speed or valve modulation), water flow sensors on every critical circuit, low-flow alarms with furnace interlock, and conductivity monitoring to detect water quality degradation. Every component that makes the difference between a reliable furnace and a constant maintenance problem is addressed.
Treated, demineralized water circulates in a closed circuit โ no fresh mineral-laden water continuously introduced. Conductivity monitoring detects water quality degradation early, before scale deposits form.
Fan speed or three-way valve modulation automatically maintains water temperature between 30ยฐC and 45ยฐC โ the optimal range for IGBT module and coil protection regardless of ambient temperature.
Individual flow sensors on the IGBT cabinet circuit, coil circuit, and capacitor bank circuit. If any circuit falls below minimum flow, an alarm sounds and โ if water loss continues โ the furnace shuts down safely.
Primary and standby centrifugal pumps. If the primary pump fails, the standby activates automatically within seconds. No manual intervention needed to keep your furnace running.
7" touchscreen shows real-time water temperature, flow rates per circuit, conductivity, pump status, and alarm history. Historical data helps identify trends before failures occur.
Accessible filter screens, drainable manifolds, and clearly labeled circuit isolation valves make routine maintenance fast. Annual maintenance typically takes 2โ4 hours with our procedures.
| System Type | Closed-loop forced-circulation water cooling |
| Cooling Capacity | 20kW โ 2000kW (matched to furnace power) |
| Flow Rate | 3 โ 200 mยณ/h (model dependent) |
| Working Pressure | 0.2 โ 0.4 MPa |
| Water Temperature (outlet) | Maintained at 30ยฐC โ 45ยฐC (adjustable setpoint) |
| Temperature Control Method | Variable-speed fan (EC motor) or three-way mixing valve |
| Heat Dissipation | Air-cooled finned tube radiator tower |
| Water Treatment | Soft water system + corrosion inhibitor |
| Flow Monitoring | Individual flow sensors per circuit with low-flow alarm & furnace interlock |
| Conductivity Monitoring | Inline conductivity sensor with alarm threshold |
| Pump Configuration | Primary + standby centrifugal pump (auto-switchover) |
| Control System | Siemens PLC + 7" touchscreen HMI |
| Ambient Operating Range | -10ยฐC to +45ยฐC |
| Certification | CE / ISO 9001:2015 |
| Warranty | 12 months from installation |