Conventional Transformer Radiator
100% Leak Testing: Every radiator is air-pressure tested at 150 kPa for 20 minutes before delivery.
C3–C5 Coating Options: Anti-corrosion coating systems are available for industrial, humid and coastal environments.
Drawing-Based Manufacturing: Panel dimensions, center distance, header pipes, flanges, valves and RAL colors can be customized.
Stable Production Capacity: Monthly production capacity exceeds 3,000 radiator sets to support batch and urgent orders.
Production from 8 Days: The exact production time depends on drawing complexity, coating requirements and quantity.
Custom Conventional Transformer Radiator
Reliable oil cooling. Consistent welding. Manufactured to your transformer drawings.
ZHIHE manufactures conventional transformer radiators for oil-immersed power and distribution transformers. Each radiator is customized according to the approved dimensions, cooling arrangement, connection details and coating requirements.
Seven automatic radiator welding lines support consistent panel production, while experienced welders complete headers, flanges, supports and other assembly details. Every completed radiator undergoes a 150 kPa air-pressure leak test for 20 minutes before surface treatment and final inspection.
- Manufactured according to customer drawings
- Seven automatic radiator welding lines
- Automatic and manual welding processes
- 100% air-pressure leak testing
- Test pressure: 150 kPa
- Holding time: 20 minutes
- Fixed and detachable designs
- C3–C5 coating options
- Customized RAL colors
- Production time starting from 8 days
- OEM and ODM manufacturing support
The final production schedule depends on drawing approval, radiator configuration, coating requirements and order quantity.
Our Key Advantages
Lower Leakage and Rework Risk:
Every radiator is tested at 150 kPa for 20 minutes, reducing leakage-related repairs and project delays.
Consistent Quality Across Every Batch:
Seven automatic welding lines ensure stable weld quality and accurate dimensions for easier transformer assembly.
More Predictable Production Schedules：
Stable production capacity supports batch and urgent orders, with production starting from 8 days, depending on drawings and quantity.
The radiator according to the installation can be divided into:Stationary and detachable.
| PG type | Stationary,don't use the flange,direct welding in the transformer oil tank on the outline |
| PC type | Detachable,through the flange fixed outside the transformer oil tank on the line |
| Technical Item | Available Option |
|---|---|
| Application | Oil-immersed power and distribution transformers |
| Cooling Method | ONAN / ONAF if fan mounting is required |
| Panel Width | Customized |
| Center Distance | According to customer drawings |
| Number of Panels | Customized |
| Panel Spacing | Customized |
| Header Pipe Size | According to technical requirements |
| Connection | Flange, valve or welded connection |
| Steel Material/Thickness | Customized |
| Working Pressure | Based on drawings and technical agreements |
| Leak Test | 150 kPa for 20 minutes |
| Surface Preparation | Sand blasting |
| Coating System | C3–C5 options |
| Paint Color | RAL color customization |
| Production Time | From 8 days, depending on drawings and quantity |
Applications
Our conventional transformer radiators can be manufactured for:
- Oil-immersed distribution transformers
- Power transformers
- Substation transformers
- Industrial transformers
- Utility transformer projects
- ONAN cooling systems
- ONAF cooling arrangements
- Transformer repair and replacement projects
- Fixed radiator installations
- Detachable radiator installations
Final suitability must be confirmed against the transformer design, cooling requirements and operating environment.
Built for Repeat Orders
For a single radiator, dimensional accuracy is essential. For a batch order, repeatability becomes equally important.
Automatic element welding helps control the same operation across the batch. Fixtures and dimensional inspections are used during assembly, while manual welding is retained for headers, flanges and customized parts that cannot be completed effectively by an automatic line alone.
Our production scope covers:
- Conventional painted radiators
- Fixed transformer radiators
- Detachable transformer radiators
- Gooseneck radiators
- Radiators with fan supports
- Header and radiator assemblies
- Replacement radiators manufactured from confirmed dimensions
Production starts from approximately eight days. The confirmed schedule depends on the drawing, radiator quantity, structural complexity and paint specification.
Our quality management system is certified to ISO 9001:2015 and GB/T 19001-2016. Radiators are manufactured according to approved customer drawings and agreed technical specifications.
Why Work with ZHIHE?
ZHIHE specializes in customized sheet-metal and structural components for oil-immersed transformers.
Customers choose us for:
• Seven automatic radiator welding lines
• Skilled manual welding and assembly
• Manufacturing based on approved drawings
• 100% radiator leak testing
• C3–C5 coating options
• Fixed and detachable radiator designs
• Custom flanges and connection arrangements
• Flexible sample and batch production
• Technical confirmation before manufacturing
• Production and pre-shipment inspection support
Our focus is to manufacture radiators that match the approved transformer interface, pass the required leak test and arrive properly protected for assembly.
Frequently Asked Questions
What is a conventional transformer radiator?
A conventional transformer radiator is an external cooling assembly used on an oil-immersed transformer. Hot insulating oil circulates from the transformer tank into the radiator, where heat is transferred to the surrounding air before the cooled oil returns to the tank.
Do you offer standard radiator sizes?
Our radiators are primarily manufactured according to customer drawings. Element dimensions, radiator center distance, header pipes, flanges and connection arrangements can be customized.
Can you manufacture detachable transformer radiators?
Yes. We manufacture detachable radiators with customized flanges, valves and connection arrangements. Fixed or directly welded designs are also available.
How are the radiators tested for leakage?
Every radiator undergoes a 150 kPa air-pressure test for 20 minutes in a leak-test pool. Welds and connections are checked for bubbles. Any detected leakage point must be repaired and retested.
Can the radiator be used for ONAN and ONAF cooling?
The radiator can be manufactured for ONAN applications and for ONAF arrangements when fan mounting and related structural details are included in the approved design.
Which coating system should I choose?
The coating system depends on the installation environment, corrosivity category, expected durability and customer specification. ZHIHE can provide C3–C5 coating options, but the complete coating system must be confirmed before production.
Can you match our flange and valve dimensions?
Yes. Header pipes, flanges, hole patterns and valve connections can be manufactured according to the approved drawings.
What is the production time?
Production starts from approximately eight days for conventional radiators. The confirmed schedule depends on drawing approval, radiator configuration, coating requirements and quantity.
What are your payment terms?
Our usual payment arrangement is 30% deposit and 70% balance before shipment by T/T. Final payment terms are confirmed in the quotation or contract.
Send Us Your Transformer Radiator Drawing
Looking for a conventional transformer radiator manufacturer that can work from your drawings?
Send us your radiator drawing, center distance, header and flange details, coating requirements and required quantity. Our team will review the information and prepare a technical and commercial proposal for your project.
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