1. Company Profile
Jiangsu Tengqi Power Equipment Technology Co., Ltd. and Zhejiang Tengqi Radiator Technology Co., Ltd., unified under βTengqi Technologyβ, specialize in power equipment core components, serving State Grid, EHV/UHV projects, and renewable energy including wind, solar, and energy storage β providing professional cooling solutions.
Tengqi Technology covers a total area of 50,000 mΒ² with 43,000 mΒ² of factory space (Jiangsu: 20,000 mΒ², Zhejiang: 23,000 mΒ²). The company operates 7 fully automatic panel radiator production lines and 3 fully automatic coating lines β from raw product to finished goods, all enclosed and fully automated with zero manual handling. High-reliability flexible automation technology, light curtains, and vision systems ensure full-process precision inspection and consistent product quality.
Annual maximum production capacity: 50,000 tons β the world's largest professional transformer radiator manufacturer. The company has also deployed rooftop photovoltaic projects, practicing green manufacturing. Service network covers 50+ countries and regions; cumulative patents exceed 100, with breakthroughs in multiple core technologies. Products are widely supplied to leading domestic and international electrical enterprises, earning high industry recognition.
2. Product Overview
2.1 Product Definition
Our transformer panel radiators are specialized core cooling components for oil-immersed power transformers and reactors. Through natural convection circulation of transformer oil or forced air cooling, they rapidly dissipate heat generated during transformer operation to the surrounding air, effectively controlling transformer temperature rise, ensuring long-term stable and safe operation, and extending equipment service life.
2.2 Product Classification
- By mounting structure: Fixed radiator (PG series), Detachable radiator (PC series)
- By cooling method: Natural Oil Natural Air (ONAN), Forced Air (ONAF/OFAF)
- By environment: Standard type, Tropical humid type (TH), Tropical arid type (TA)
- By material process: Cold-rolled steel radiator, Hot-dip galvanized anti-corrosion type, Epoxy spray type, Aluminum alloy radiator
2.3 Application Scope
Suitable for all types of oil-immersed distribution transformers, power transformers, rectifier transformers, traction transformers, wind/solar dedicated transformers, and industrial specialty transformers β meeting requirements for indoor, outdoor, coastal, high humidity, extreme cold, industrial corrosion, and other complex environments.
3. Model Numbering System
3.1 Coding Rules
- P:
- P = Panel Radiator
- X:
- X = Mounting Type (G = Fixed, C = Detachable)
- Center Distance:
- Center distance between upper and lower headers, in mm
- Panels:
- Number of individual cooling panels
- Width:
- Overall panel width, in mm
- Environment:
- Environment Code: TH = Tropical Humid, TA = Tropical Arid, blank = Standard
3.2 Example
- PC:
- PC: Detachable panel radiator
- 3200:
- 3200: Center distance 3200 mm
- 32:
- 32: 32 cooling panels
- 520:
- 520: Panel width 520 mm
- TH:
- TH: Tropical humid anti-corrosion type
4. Core Technical Parameters
| Product Type | Standard | Anti-Corrosion | Application | Service Life | Key Advantage | Spec Example |
|---|---|---|---|---|---|---|
| Standard Painted Radiator | Painted type | β β β | Indoor standard distribution, arid areas | 8-10 years | Cost-effective, fast delivery | PC2000(1600)-3(23)/520 |
| Hot-Dip Galvanized Radiator | Hot-dip galvanized | β β β β | Coastal/industrial zones, outdoor substations, export projects | 15-20 years | Maintenance-free, corrosion-resistant | PC3000-32/520 |
| Galvanized + Painted Radiator | HDG + painted | β β β β β | Export projects, key national projects | 20-25 years | Dual protection, customizable | PC3000(2600)-29(3)/520 |
| Stainless Steel Radiator | Tengqi extended | β β β β β | Chemical plants, offshore platforms | 25+ years | Strong anti-corrosion, long life | PC2000-25/520 |
5. Product Structure & Process Advantages
5.1 Structural Composition
The product mainly consists of upper header, lower header, cooling panels, connecting flange, lifting rings, air vent plug, oil drain plug, and reinforcing ribs β compact structure, smooth oil passage, no cooling dead spots.
- Headers: High-quality seamless steel pipe, smooth inner wall free of burrs, ensuring unobstructed oil flow.
- Cooling Panels: 1.0mm/1.2mm premium cold-rolled steel, stamped corrugated forming, large heat dissipation area, high structural strength.
- Seals: Special oil-resistant seals compatible with transformer oil, long-term use without leakage or aging.
5.2 Typical Structure Diagram (Gooseneck Type)
5.3 Core Process Advantages
1. Efficient Heat Dissipation
Optimized cooling panel design increases surface area, smooth oil convection circulation, cooling efficiency improved by 8%+.
2. Anti-Corrosion & Durability
Standardized surface treatment (shot blasting or acid pickling/phosphating) + hot-dip galvanizing/epoxy paint or powder coating, salt spray and humidity resistant, outdoor service life β₯20 years.
3. Leak Prevention & Seal Guarantee
Fully automated precision seam welding, 100% pressure leak testing and seal inspection for every unit, completely eliminating oil leakage.
4. Clean Internal Cavity
External welding process ensures no slag or iron filings inside; inner wall undergoes cleanliness treatment and specialized inspection, does not contaminate transformer oil, ensuring insulation safety and long-term reliability.
5. Superior Strength
Reinforcing ribs added for impact and vibration resistance, adapted to transformer transport and long-term operating conditions.
6. Easy Installation
Standardized flange interfaces with precise dimensions, supporting fixed/detachable designs for various installation scenarios.
6. Certifications
Quality Management | Environmental Management | OHS Management | Fusion Welding Quality | Energy Management
7. Product Selection Guide
| No. | Category | Selection Criteria |
|---|---|---|
| 1 | By Transformer Voltage Class | Match radiator model with corresponding cooling surface area based on transformer voltage class per product parameter table. |
| 2 | By Cooling Method | Small-capacity or low-noise applications: ONAN type. Large-capacity, high-loss transformers: ONAF/OFAF forced air cooling type. |
| 3 | By Installation & Transport | Small dimensions: fixed type (PG), lower cost. Large dimensions, long-distance transport: detachable type (PC), easier handling. |
| 4 | By Operating Environment | Standard outdoor: standard type. Coastal/high humidity/chemical zones: TH anti-corrosion type. High temperature arid zones: TA type. Refer to ISO 12944. |
| 5 | Custom Requirements | Non-standard center distances, panel counts, materials, and surface treatments (stainless steel/aluminum) available per customer transformer specs and operating conditions. |
8. Quality Assurance
8.1 Quality System
The company strictly operates under ISO 9001 quality management system. From raw material procurement, component processing, welding, surface treatment, to finished product inspection and packaging β the entire process implements standardized quality control, ensuring every unit meets design and standard requirements.
8.2 Applicable Standards
Product design, manufacturing, and testing strictly follow national and international standards:
- JB/T 5347 β Panel Radiators for Transformers
- IEC 60076-2 (Power Transformers β Temperature rise)
- Internal quality control standards and customer technical agreement requirements
- Type test reports from accredited institutions ensure product compliance
8.3 Raw Material Quality Control
All steel, welding materials, fasteners, and coating materials are procured from qualified suppliers. Incoming material undergoes composition verification, dimensional re-inspection, and performance testing. Non-conforming raw materials are strictly prohibited from production.
8.4 In-Process Quality Control
- First-piece inspection, in-process patrol inspection, and final inspection at key processes
- Dedicated personnel responsible for welding, pressure testing, leak detection, and coating β with traceable records
- Each radiator undergoes individual pressure testing and seal inspection to eliminate leakage risks
8.5 Final Inspection
Each radiator completes the following inspections before release:
- Visual quality and dimensional accuracy check
- Internal cavity cleanliness, pressure test, and sealing test
- Coating thickness, adhesion, and appearance inspection
- Product identification and packing list completeness verification
9. Installation Specifications
- Pre-installation Check: Verify product model, inspect radiator appearance for deformation, weld integrity, and seal condition.
- Lifting Requirements: Use dedicated lifting rings for level lifting. Never directly strap cooling panels to avoid stress deformation.
- Installation & Adjustment: Ensure radiator verticality β€3β°, flange alignment parallel, gasket centered without misalignment, bolts evenly torqued per standard.
- Seal Testing: After installation, perform overall oil circuit pressure test; verify no leakage before filling with transformer oil.
- Air Venting: After oil filling, open top air vent plug to expel all internal air, ensuring unobstructed oil circulation.
10. After-Sales Service Commitment
- Warranty Period: 18 months from factory shipment. Free repair/replacement for non-human damage within warranty.
- Response Time: Mainland China β 24-hour technical response, 48-hour solution provision, remote areas 72-hour on-site service.
- Technical Support: Free selection consulting, installation guidance, technical training, and on-site commissioning.
- Spare Parts Supply: Long-term inventory of seals, flanges, and other common spare parts to support ongoing maintenance needs.
11. Contact Information
| Company (Jiangsu) | Jiangsu Tengqi Power Equipment Technology Co., Ltd. |
| Address (Jiangsu) | No.56 Xinqian Road, Zhonglou District, Changzhou, Jiangsu, China |
| Company (Zhejiang) | Zhejiang Tengqi Radiator Technology Co., Ltd. |
| Address (Zhejiang) | No.413 Xiqu Avenue, Haiyou Street, Taizhou, Zhejiang, China |
| Sales Hotline | +86 13506148002 / +86 13775644948 |
| caiwenhuan@wetqt.com | |
| Website | wetqt.com |
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