Transformer Manufacturer Since 1961

Established in 1961, we are state owned and designated by the Ministry of Machinery Industry. We specialize in making wide frequency transformers used by oil fields, desalter transformers (TYDK Series), and oil refinery desalting devices.

With advanced facilities, a skilled technical team, and award-winning TYDK series, etc., our products are applied in power grids, refineries, offshore platforms, and petrochemical industries, and exported globally.

Industry Record
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Overseas Record
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Export Countries
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Beyond Design Lifespan

In 2025, we received an inquiry from Urumqi Petrochemical about equipment we manufactured in 1994. It had been operating reliably for 31 years—over three times its 10-year design life—proving the durability of our transformers.

50+

50-Year Commitment

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100-Year Confidence
The transformer produced by our factory in 1994 has been in operation for 31 years.
Manufacturing Year 1994

Industry Service

Why We Still Persist?

We remain committed to our original mission, as even equipment built 31 years ago still returns to us.
Our future is better service and clearer communication, showcasing Shenyang No.4 Transformer Co., Ltd.
Our state-owned foundation remains steadfast—never cutting corners, striving to deliver products that last 50 years.
Comprehensive Management with AI
We apply AI across sales, production, and supply to enhance service.
Growing Global Recognition
Continuing exports under the Belt and Road, progressing together with our country.
Electrostatic desalter unit with dedicated transformer, access platform and integrated piping
Field-installed system

Electrostatic Crude-Oil Desalter

A real project installation integrating the horizontal vessel, access platform, dedicated transformer, piping and local instruments.

  • System interfaces are confirmed against project process and electrical data.
  • Transformer and vessel configuration remain project-specific.
  • Final supply scope follows approved drawings and contract documents.
Explore the system
REAL MANUFACTURING EVIDENCE

From Winding to Delivery

Real photographs from our own records show the manufacturing path behind the finished equipment—not just another row of product renders.

Exterior of the Shenyang transformer manufacturing facility01
Manufacturing base

Factory Environment

The physical starting point for production, inspection and project delivery.

Operators preparing insulation board in the transformer workshop02
Material preparation

Insulation Preparation

Insulation board is cut and prepared before active-part assembly.

Complete three-phase transformer active part during assembly03
Assembly

Active-Part Structure

Three-phase windings, clamping frame and visible leads during assembly.

Transformer inspection and test work in a clean factory bay04
Quality evidence

Inspection & Testing

Connections and equipment condition are checked before release.

Transformer equipment being packed for delivery in the factory05
Delivery

Packing & Shipment

Finished equipment moves into packing, handling and shipment preparation.

SELECTED PROJECT EXPERIENCE

Proven in Energy and Process Applications

A concise selection of representative applications, kept separate from the manufacturing evidence above.

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With sixty years of deep commitment to the power industry, we have always upheld the spirit of craftsmanship.
Advancing together with global clients through reliable quality.