A Specialist Manufacturer of Transformer Cooling Components

LEOtherm Trading (Suzhou) Co., Ltd. is a China-based manufacturer specializing in the development and production of panel radiators for oil-immersed transformers. Our products serve as critical components that deliver efficient cooling and reliable protection for transformers across various voltage classes.

Our manufacturing base is located in Changge, Henan province. Equipped with automated production lines, we utilize roll forming, stamping, electric welding, and seam welding to produce individual panels. These panels are joined to the oil header pipes using an external CO₂ shielded welding process, which completely eliminates issues such as slag and iron filings associated with internal welding. Each unit undergoes rigorous pressure testing for sealing integrity. The external surfaces are treated with pickling, phosphating, and painting, while the internal channels are flushed with hot oil — ensuring consistent product quality. Our radiators are designed to meet the dimensional and thermal requirements of modern transformer designs.

With every shipment, we provide a Material Test Report (MTR) and dimensional inspection data, enabling your engineering team to verify quality prior to installation.

A Transparent, Documented Production Process

From steel coil to packed radiator, every stage is controlled and recorded. Pressure and leak testing, dimensional inspection and surface-treatment checks are built into the workflow.

We welcome virtual factory tours and provide process documentation so your team can verify our capabilities before committing to an order. Our quality management system is being aligned to ISO 9001 practice.