Precision Cooling for Oil-Immersed Power & Distribution Transformers
LEOtherm engineers and manufactures transformer panel radiators in Q235B carbon steel and 304 stainless steel — supplied to transformer OEMs, EPC contractors and utilities across North America, Europe, the Middle East and Southeast Asia.
A Specialist Manufacturer of Transformer Cooling Components
LEOtherm (LEOtherm Trading (Suzhou) Co., Ltd.) is a China-based manufacturer focused exclusively on pressed-steel panel radiators for oil-immersed transformers. From our production base in Changge, Henan, we combine automated press-forming, robotic seam welding and controlled surface-treatment lines to deliver radiators that meet the dimensional and thermal requirements of modern transformer designs.
Every radiator is built to a documented process: panel forming, header assembly, welding, pressure and leak testing, surface treatment and export packing. We supply material test reports and dimensional inspection data with each shipment, so your engineering team can validate quality before installation.
More About LEOtherm
Engineered for Reliability, Built for Export
A focused product range, transparent manufacturing and complete technical documentation — the foundations international buyers need to specify with confidence.
Choose Q235B carbon steel for cost-efficient service or 304 stainless steel for coastal, humid and chemically aggressive environments — both produced as pressed-steel panel radiators.
Each model is rated for both ONAN self-cooled and ONAF forced-air duty, with dissipation areas engineered to the heat load of your oil-immersed transformer.
Header pipes and flanges are produced to DIN, ANSI and GB standards so assemblies integrate cleanly with your tank, valves and connecting pipework.
Standard models ship in 5–11 days. A confirmed production schedule is issued on order confirmation, with material test reports on every shipment.
Carbon-steel units are shot-blasted and finished with hot-dip galvanizing, electrostatic powder coating or multi-layer paint, selected for the site's corrosivity class.
Designed in reference to DL/T 1266-2013 and aligned with IEC 60076-2 / IEEE C57.12.00 temperature-rise practice, with dimensional inspection data supplied.
Standard Panel Radiator Models
Ten production-ready models in carbon and stainless steel, with cooling areas matched to common 10–35 kV distribution and power transformer ratings.

Cooling Solutions Across Power-Intensive Industries
Our radiators support utility substations and distribution grids, heavy industrial and manufacturing plants, and renewable-energy installations including solar farms, wind sites and battery energy-storage systems — wherever oil-immersed transformers require dependable thermal management.
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.
See How We Build
Send us your drawings or transformer ratings and our engineering team will respond within 24 hours with a detailed technical proposal.