Suzhou & Henan, China  info@leotherms.com
Pressed-Steel Panel Radiators · Engineered in China, Supplied Worldwide

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.

Built to DL/T 1266-2013 ONAN / ONAF Cooling DIN / ANSI / GB Flanges 5–11 Day Lead Times
10+
Standard Radiator Models
2
Material Grades (Q235B / 304)
5–11
Day Production Lead Time
4
Continents Served
Who We Are

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
LEOtherm pressed-steel transformer panel radiators on the production line
Why 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.

Dual-Material Engineering

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.

Verified Cooling Performance

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.

Multi-Standard Flanges

Header pipes and flanges are produced to DIN, ANSI and GB standards so assemblies integrate cleanly with your tank, valves and connecting pipework.

Fast, Reliable Lead Times

Standard models ship in 5–11 days. A confirmed production schedule is issued on order confirmation, with material test reports on every shipment.

Corrosion Protection Systems

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.

Full Documentation

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.

Product Range

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.

LEOtherm Q235B Carbon Steel transformer panel radiator model PC1200-23/480
Q235B Carbon
Cooling area (ONAN)14.3 m²
Transformer rating800–2000 kVA
Lead time7–10 days
View Specifications
LEOtherm Q235B Carbon Steel transformer panel radiator model PC1400-28/480
Q235B Carbon
Cooling area (ONAN)19.65 m²
Transformer rating1600–3150 kVA
Lead time8–10 days
View Specifications
LEOtherm 304 Stainless Steel transformer panel radiator model PC1250-25/480
304 Stainless
Cooling area (ONAN)15.99 m²
Transformer rating1000–2500 kVA
Lead time9–11 days
View Specifications
LEOtherm Q235B Carbon Steel transformer panel radiator model PC1250-29/480
Q235B Carbon
Cooling area (ONAN)18.11 m²
Transformer rating1250–2500 kVA
Lead time8–10 days
View Specifications
LEOtherm Q235B Carbon Steel transformer panel radiator model PC1500-27/480
Q235B Carbon
Cooling area (ONAN)20.39 m²
Transformer rating2000–3150 kVA
Lead time7–10 days
View Specifications
LEOtherm Q235B Carbon Steel transformer panel radiator model PC1000-10/520
Q235B Carbon
Cooling area (ONAN)6.01 m²
Transformer rating400–800 kVA
Lead time5–8 days
View Specifications
304 stainless steel transformer panel radiator manufactured by LEOtherm
Applications

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.

  • Power & distribution grids — substations from 400 kVA to 6300 kVA banks
  • Industrial & manufacturing — plants, workshops and process facilities
  • Renewable energy — solar, wind and energy-storage step-up transformers
Explore Applications
Manufacturing & Quality

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
LEOtherm radiator welding and manufacturing process
Request a Quote
Ready to Specify Your Transformer Radiators?

Send us your drawings or transformer ratings and our engineering team will respond within 24 hours with a detailed technical proposal.