40 Years of Unwavering Focus in Microfiltration Mastery

Dongou： Precision Filtration, Trusted at Scale

Dongou designs and manufactures industrial microfiltration and solid–liquid separation systems for metallurgy, chemical, battery materials, pharmaceutical, food and environmental applications. Our Pressure Vessel Plant (46,000 m²) handles heavy fabrication and pressure-containing components, while our Filter Plant (21,000 m²) focuses on filter media and element engineering — from sintered porous membranes to precision filter modules. With an annual manufacturing capacity exceeding 2,000 units and integrated lab-to-production workflows, we combine scalable delivery with rapid R&D-driven customization.

Dedicated, complementary plants

Clear production split lets us scale vessel fabrication and filter media production independently while keeping lead times predictable.

Filter Plant — R&D-driven production

The Filter Plant performs volume manufacturing and drives new material development, sintering process optimization, modular element design and pilot validation — enabling high-precision customization and rapid scale-up.

Lab-to-line validation

Pilot testing and sample-based qualification shorten technical risk and accelerate commissioning.

Automation & quality control

CNC machining, automated welding and controlled assembly ensure consistency and traceability.

Founder & Legacy of Innovation

The company’s R&D foundation was built by Professor Song Xianhong, inventor of polymer sintered microfiltration technology and a pioneer in microporous filtration theory in China.

Under his leadership, Dongou developed an integrated engineering system combining research, design, manufacturing, and service — a model that continues to shape the company today.

Guided by this spirit of innovation, the third generation of leadership now carries forward Professor Song’s vision, uniting experts across metallurgy, chemical engineering, and various filtration applications. Through close collaboration with leading research institutes and industrial partners, Dongou continues to refine and expand the boundaries of sustainable industrial filtration worldwide.

Company Culture

Mission

To deliver energy-saving and performance-driven microfiltration technologies that enable cleaner and greener industrial processes for our global clients

Vision

To become the world’s premier provider of microfiltration solutions and services

Core Values

Gratitude · Integrity · Diligence·

Innovation · Mutual Success

Factory Show

Global Standards, Proven Excellence

Industry–Academia–Research Integration

Dongou translates polymer science into manufacturable microfiltration solutions through close industry–academia collaboration.

Dongou has established a tightly integrated industry–academia–research model that links polymer science, process development and industrial-scale manufacturing. In April 2013, “Dongou Surface Filtration,” developed under the leadership of Professor Song Xianhong and validated through mathematical modeling, repeated experiments and pilot trials, received national recognition — demonstrating higher filtration precision and efficiency with lower energy and material consumption. Our Filter Plant drives scale-up of sintered porous membranes and precision filter modules, while the Pressure Vessel Plant provides robust pressure-rated fabrication. Together, these capabilities shorten technical risk from sample to turnkey delivery and enable repeatable, field-proven filtration solutions for metallurgy, chemical, battery materials, pharmaceutical, food and environmental applications.

Theory-led, practice-validated

a data-driven R&D approach built on mathematical models and extensive testing.

“Surface Filtration” innovation

integrates advantages of surface and deep filtration to overcome trade-offs among energy use, material consumption and precision.

Industry–academia pathway

from academic research to in-house pilot validation to industrial scale-up across two dedicated plants.