Transformer Conservator Tank Manufacturer | Oil Expansion Tank Supplier

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Updated: Jul 18, 2026
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Transformer Conservator Tank

Transformer Conservator Tank Manufacturer

Radiastar is a professional Transformer Conservator Tank Manufacturer specializing in the design and production of oil conservator tanks, transformer expansion tanks, and customized transformer components for global transformer manufacturers, utilities, and engineering companies.

A Transformer Conservator Tank is an important accessory installed on oil immersed transformers. It provides additional space for transformer oil expansion and contraction caused by temperature changes during operation.

By maintaining stable oil volume and preventing moisture and oxygen from entering the transformer oil system, the conservator tank helps improve transformer reliability and extend service life.

Radiastar supplies high-quality Transformer Oil Conservators for distribution transformers, power transformers, substations, renewable energy projects, and industrial applications.

What Is a Transformer Conservator Tank?

A Transformer Conservator Tank, also known as a Transformer Oil Conservator, Transformer Expansion Tank, or Oil Expansion Tank, is an auxiliary oil storage tank connected to the main transformer tank.

During transformer operation:

  • Transformer load increases → oil temperature rises → oil expands → excess oil flows into the conservator tank.
  • Transformer load decreases → oil temperature drops → oil contracts → oil returns from the conservator tank.

This process maintains proper oil level and prevents excessive pressure changes inside the transformer.

Transformer Conservator Tank Structure

Radiastar transformer conservator tanks are manufactured with reliable structures designed for outdoor transformer applications.

1. Steel Tank Body

The conservator tank body is made from high-quality carbon steel with:

  • High mechanical strength
  • Excellent welding performance
  • Long-term outdoor durability
  • Corrosion-resistant coating

Surface treatment options include:

  • Shot blasting
  • Anti-corrosion primer
  • Epoxy coating
  • Outdoor weather-resistant paint

2. Oil Level Indicator

The oil level indicator helps operators monitor the transformer oil level.

Common options:

  • Magnetic oil level gauge
  • Float type oil level indicator

3. Bladder / Air Cell System

For high-voltage power transformers, Radiastar provides bladder type conservator tanks.

Advantages:

  • Prevents direct contact between transformer oil and air
  • Reduces oil oxidation
  • Minimizes moisture absorption
  • Extends transformer insulation life

4. Oil Connection Components

Including:

  • Oil inlet flange
  • Oil outlet flange
  • Drain valve
  • Oil filling connection
  • Breather connection

Types of Transformer Conservator Tanks

Conventional Transformer Conservator Tank

Traditional oil conservator design.

Features:

  • Simple structure
  • Easy installation
  • Reliable operation
  • Cost-effective solution

Applications:

  • Distribution transformers
  • Medium voltage transformers

Bladder Type Transformer Conservator Tank

Also called:

  • Air Cell Conservator Tank
  • Rubber Bladder Conservator

Features:

  • Better oil protection
  • Reduced oxidation
  • Suitable for long-term transformer operation

Applications:

  • Power transformers
  • High voltage transformers
  • Utility transformers

Customized Transformer Expansion Tank

Radiastar provides customized production according to:

  • Transformer capacity
  • Oil volume
  • Voltage level
  • Customer drawings
  • Installation requirements

Transformer Conservator Tank Applications

Radiastar transformer conservator tanks are widely used for:

Oil Immersed Power Transformers

Applications:

  • 33kV transformers
  • 66kV transformers
  • 110kV transformers
  • 220kV transformers

Distribution Transformers

Applications:

  • 10kV
  • 11kV
  • 20kV
  • 35kV

Renewable Energy Transformers

Used in:

  • Solar power plants
  • Wind power projects
  • Energy storage systems

Industrial Transformers

Applications:

  • Mining industry
  • Steel industry
  • Chemical plants
  • Heavy industry

Transformer Conservator Tank Technical Specifications

ParameterSpecification
Product NameTransformer Conservator Tank
BrandRadiastar
ApplicationOil Immersed Transformer
MaterialCarbon Steel / Stainless Steel
Voltage Range10kV-220kV
InstallationOutdoor
StructureStandard / Bladder Type
Oil TypeMineral Oil / Ester Oil
ProductionOEM Customized
StandardIEC 60076

Why Choose Radiastar Transformer Conservator Tank?

Professional Transformer Component Manufacturer

Radiastar focuses on manufacturing transformer components, including:

  • Transformer Conservator Tank
  • Transformer Radiator
  • Corrugated Transformer Tank
  • Transformer Oil Tank
  • Transformer Accessories

Customized OEM Manufacturing

Radiastar provides:

✔ Customized dimensions
✔ Customer drawing production
✔ OEM service
✔ Flexible manufacturing solutions

Strict Quality Control

Each transformer conservator tank undergoes:

  • Raw material inspection
  • Welding inspection
  • Leakage testing
  • Surface coating inspection
  • Dimension inspection

Factory Direct Supply

Working with Radiastar provides:

  • Competitive factory pricing
  • Stable production capacity
  • Reliable delivery time
  • Technical support

Transformer Conservator Tank Manufacturing Process

1. Engineering Design

Production drawings are prepared according to transformer specifications.

2. Steel Plate Processing

Steel plates are cut and formed using precision equipment.

3. Welding and Assembly

Professional welding ensures:

  • Oil tightness
  • Structural strength
  • Long service life

4. Surface Treatment

Including:

  • Sand blasting
  • Primer coating
  • Final painting

5. Quality Testing

Before shipment:

  • Leakage test
  • Pressure test
  • Dimension inspection
  • Appearance inspection

FAQ

What is a transformer conservator tank?

A transformer conservator tank is an oil storage device installed on oil immersed transformers to compensate for transformer oil expansion and contraction.

What is another name for transformer conservator tank?

Common international names include:

  • Transformer Oil Conservator
  • Transformer Expansion Tank
  • Oil Expansion Tank
  • Transformer Oil Reservoir

Do dry type transformers need conservator tanks?

No. Conservator tanks are mainly used for oil immersed transformers because dry type transformers do not contain transformer oil.

Can Radiastar manufacture customized conservator tanks?

Yes. Radiastar produces customized transformer conservator tanks based on:

  • Transformer rating
  • Voltage level
  • Oil capacity
  • Customer drawings

Related Transformer Products

Internal linking recommendation:

  • Transformer Radiator
  • Corrugated Transformer Tank
  • Transformer Oil Tank
  • Oil Immersed Transformer
  • Transformer Accessories Manufacturer

Factory Inquiry CTA

Get Transformer Conservator Tank Factory Price

Looking for a reliable Transformer Conservator Tank Manufacturer?

Radiastar provides:

✔ OEM transformer components
✔ Customized conservator tank solutions
✔ Factory direct pricing
✔ Global export service

Send your transformer requirements or drawings to get a professional quotation.

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