Corrugated Compensator

Transformer Corrugated Bellows

Product Introduction

[Ziyang]  ·  [Shenyang, China]

1. Product Overview

Transformer corrugated bellows are a critical sealing and volume-compensation component for oil-immersed power and distribution transformers. As the insulating oil expands and contracts with temperature fluctuations, the bellows flex to accommodate the volume change while maintaining a hermetically sealed environment. This prevents moisture ingress and oil oxidation, directly extending the service life of the transformer.

Designed as a reliable “breathing” mechanism, our bellows safeguard transformer tanks from internal pressure build-up and external contaminants, making them an ideal replacement for traditional oil conservators in modern transformer designs.

2. Key Features

• Superior Flexibility: The corrugated geometry provides excellent axial and lateral compliance, absorbing thermal expansion and contraction without fatigue over a long service life.
• Leak-Proof Performance: Precision-formed convolutions with high-integrity welding ensure zero leakage under extreme pressure and vacuum conditions.
• Customizable Dimensions: Made to order in diameter, number of convolutions, overall length, and flange type to fit your specific tank design.
• Corrosion Resistance: Stainless-steel construction offers long-term durability even in high-humidity, coastal, or chemically aggressive environments.

3. Technical Specifications

Standard specifications are listed below. All parameters can be adjusted to customer drawings (DWG / DXF) and project requirements.

Parameter	Specification
Material	Stainless Steel SS304 / SS316L (Mild Steel on request)
Wall Thickness	0.8 mm – 2.0 mm (customizable)
Design Pressure	As per customer specification / IEC guidelines
Temperature Range	-40 °C to +120 °C (operating)
Connection Type	Flanged (bolt-on) or welded ends
Surface Treatment	Pickling & passivation / mirror polish
Applicable Standard	IEC 60076, GB/T 6451
Testing	100% air-tightness (leak) test before shipment

4. Advantages over Traditional Conservator

Aspect	Corrugated Bellows	Traditional Conservator
Maintenance	Virtually maintenance-free	Periodic membrane inspection
Installation Volume	Compact, integrates with tank	Bulky separate vessel
Sealing Integrity	Fully hermetic, minimal oil-air contact	Higher risk of moisture ingress
Oil Aging	Significantly reduced	Faster degradation
Service Life	Extended transformer lifespan	Standard

5. Applications

• Oil-immersed Distribution Transformers (up to 35 kV)
• Power Transformers (110 kV and above)
• On-Load Tap Changers (OLTC) oil conservator systems
• Reactors and other oil-filled power equipment requiring volume compensation

6. Why Choose Us

• OEM / ODM Support: Complete customization based on your drawings, with engineering review and design proposal within 24 hours.
• Quality Assurance: Every bellows undergoes 100% air-tightness testing before shipment under a strict QC system.
• Experience: Years of specialization in transformer components and global export.
• Fast Lead Time & Competitive Pricing: Efficient production and reliable worldwide shipping.

7. Ordering Information

To receive an accurate quotation, please provide the following with your inquiry:

• Transformer rated power / voltage level
• Required expansion volume or operating temperature range
• Connection type (flange dimensions or welded ends)
• Material preference (SS304 / SS316L / other)
• Quantity and target delivery date

Send us your tank drawing (DWG / DXF) and we will respond with a free design proposal within 24 hours.