Import Double Stage Vacuum — Buy in Bulk from Supplier in China

This double stage vacuum system is engineered for high-voltage transformer maintenance, specifically designed for use in substations above 500 meters elevation. It achieves a limited vacuum of 5 pascal and operates at 35 pascal with a pumping speed of 333 litres per second, enabling rapid dehydration and degassing of insulating oil. The unit integrates a duplex space solid flash evaporator to remove dissolved water and employs dual-stage filtration using high-macular material and reticulated mesh to extract particulate contaminants.

The system is built to meet the demands of 110kV and above electrical equipment, where moisture and gas contamination compromise dielectric strength. Unlike single-stage units, this design combines vacuum oiling and drying functions in one unit, using a bridge vacuum connection system that allows direct integration with transformers during servicing. The filtration stack is tailored for oil purity standards required in high-voltage applications, with material choices selected for chemical resistance and thermal stability under continuous operation.

Buyers include utility maintenance teams, transformer manufacturers, and electrical infrastructure contractors operating in mountainous or high-altitude regions. The unit weighs 450 kg and is designed for electric operation with integrated controls. Packaging is standard industrial crate with foam padding and steel strapping. Lead time and incoterms must be confirmed directly with the supplier, as they vary by destination and order volume.

Chongqing Tongrui Filtration Equipment Manufacturing Co.Ltd is a manufacturer based in Hu Zhu Industrial Park, Dadukou District, Chongqing, China. The supplier is classified as imported and verified by harbor-level trust signals, indicating physical presence and export readiness. The listing does not state years in operation, workforce size, or client names, and no certifications such as ISO or CE are referenced.

The company focuses on vacuum filtration systems for electrical insulation applications, with this product being one of its core offerings. There is no mention of R&D facilities, export history, or after-sales service networks. Response rate and average response time are not available in the source data, and no claims are made regarding production capacity or third-party testing.