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Innovation for tomorrow
We are committed to ensuring our utmost to be the best value innovative enterprise
We produce different types of sealing products such as mechanical seal, packings, and gasket etc. and are developing various components and materials needed for power generation plant. We create the future based on the company’s quality management system through high quality production and the cutting-edge production technology.
Dongsuh Ind. has achieved the world best quality and service through the complete process renovation such as the standardization of the production process and management of standard dimension, etc. based on the creative mind and passion as an innovative company for challenge and creative value of the unlimited possibility to realize the customer needs. We are also doing our utmost for the customer impression not for the customer satisfaction while securing the reliability based on the company’s ultra precise production technology and know-how along with the cutting-edge facilities.
President,
Seo Jeoung Kwon
mission statement
To provide the world’s most reliable sealing solutions that ensure the safety and efficiency of global energy infrastructure, driven by relentless R&D and a commitment to sustainable engineering
core pillars 01
Safety First
We protect critical infrastructure—from nuclear power plants to industrial refineries—by engineering high-precision seals that prevent leaks and ensure operational integrity.
core pillars 02
Technological Leadership
Leveraging over 30 years of expertise and patented innovations, we strive to set new global standards in material science and sealing performance.
core pillars 03
Environmental Stewardship
Through our "Green Growth" philosophy, we develop eco-friendly materials and high-efficiency gaskets that reduce industrial emissions and minimize environmental impact.
A Legacy of Precision, A Future of Innovation
Over 30 Years of Milestone Achievements in Industrial Sealing Technology.
Dongsuh Industry’s journey began in 1993 with a singular focus: to localize and perfect the high-performance sealing technology required for the most demanding industrial environments.
1993: The Foundation of Specialized Excellence
Dongsuh Industry was established with a mission to localize high-performance sealing technology.
Since its inception in 1993,
the company has focused on the rigorous requirements of industrial plants, laying the groundwork for what would become a 30-year legacy of engineering integrity and domestic manufacturing strength.
Technical Dominance: 80% Market Share in Power Generation
A key milestone in Dongsuh’s history is achieving a dominant 80% market share in the domestic power plant sealing device sector.
By securing critical
certifications (ISO 9001/14001, KS) and proving reliability in high-stakes nuclear and thermal power environments, Dongsuh became the standard-setter for the energy industry in Korea.
Innovation & Global Expansion: Patented Sealing Technology
The establishment of the Central R&D Center marked a shift toward global leadership.
By securing international patents
patents—most notably for the Graphite Pressure Seal Ring (No. 10-2360434)—Dongsuh successfully transitioned from a manufacturer to a technology owner, exporting specialized solutions to the Middle East, USA, and Southeast Asia.
Certified Excellence. Patented Innovation
Meeting the Highest Global Standards for Quality, Safety, and Environmental Management.
Our commitment to excellence is backed by a comprehensive suite of international certifications, including ISO 9001 for quality management and ISO 14001 for environmental responsibility, alongside rigorous KS (Korean Standard) marks