Founded in 1997, Chongqing Yuneng Oil-Filter Manufacturing Co., Ltd. is a new and high-tech joint-stock enterprise specialized in R&D, manufacturing, and marketing of turn-key projects in oil purification, water and gas filtration, and other reclamation products.

Now we have 116 employees, including a group of professionals with many years of experience and technical development capabilities in the industry. We are recognized as the Chongqing Enterprise Technology Center by relevant functional departments in Chongqing. We can produce 1,000 sets of oil-filtering equipment and purification equipment for other fluids every year. We are one of the world competitive companies specializing in high-tech oil purifier research and manufacture.


YUNENG has received 4 invention patents and 48 national utility model patents. Our company is audited by BV, SGS, with ISO9001, ISO14001, ISO45001. Besides, our company has been rated as a high-tech enterprise in Chongqing many times. Several series products are awarded as “New and High-tech Products of Chongqing”. The ZJA series “Double Stage Vacuum Oil Purifier” is awarded as “Famous Brand in Chongqing” and obtained CE certification. All these lay a solid foundation for our company to provide customers with high-quality reliable products and fast and comprehensive service to avoid homogenous competition on quality improvement.


So far we have sold over 15,000 sets of Yuneng brand oil purifiers, which are widely used in power electric, metallurgical, petrochemical, mechanical, military industry, railway, light industry, and other industries. Our products enjoy a fairly big market share and have become a famous brand in medium- and high-grade oil treatment equipment. We cover 90% domestic market share for transformer oil filtration systems in China and export to over 80 different countries including the United Kingdom, Spain, Australia, Italy, India, Indonesia, Bangladesh, Vietnam, Philippines, Korea, Malaysia, Myanmar, UAE, Saudi Arabia, Egypt, Pakistan, Zambia, Ethiopia, Nigeria, South Africa, Peru, Brazil, Chile, Mexico, Columbia, Kyrghyzstan, Azerbaijan, etc.


Over the past two decades, we have always stuck to the operational concept of “being faithful and dedicated, practical in development, and cooperative for common progress”. By working in a down-to-earth manner and orientating ourselves to customer needs, we have received the recognition of a lot of customers and become the regular supplier of STATE GRID, CHINA SOUTHERN POWER GRID, TBEA, CHINA XD, ABB, SIMENS, ENERGY CHINA, TAIKAI GROUP, CHINT, etc.

In the future, Yuneng will cooperate with universities and colleges and follow the path of production, learning, research development, so as to realize the goal of making strong its main business while making bigger the company as a whole. We are ready to do our part to develop national industries, save energy, protect the environment and pay for society.

Project Photos

process of transformer transmit

1. 20,000L/h Transformer Oil Purifier at TBEA Shengyang Factory.

2. 4320m³/h Vacuum Pumping Unit at the Site of ±800kV Converter Station.

3. 200m³/h Dry Air Generator at the Site of 800kV Qingzhou Converter Station.

4. 1020L/h Precision Oil Purifier and Oiling Machine for Australia Client.

5. 60m³/h SF6 Gas Recovery at the Site of Guangzhou Converter Station.

6. 3 Units of 12000L/h Transformer Oil Purifiers in Pakistan.

Packaging & Shipping

To be packed in iron case or wooden case (s) for long distance (ocean/air) transportation. 

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After-Sales Service

  • One-year guarantee for product quality(People damaged parts are charged).
  • Lifelong maintenance and spare parts supply.
  • Free design of fixtures as customers required.
  • Free training for machines installation and operation of the staff at factory.

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