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Three Decades of Engineering Excellence
Founded in 1993, we began with a mission to master the high-precision sealing technologies required for Korea’s rapidly growing industrial sectors. Over the past 30 years, we have transitioned from a specialized manufacturer to a technology-owning leader, now commanding over 80% of the domestic market share for power plant sealing devices.
Three Decades of Engineering Excellence
From Local Specialist to Global Technical Authority in Industrial Sealing.
The story of Dongsuh Industry is one of relentless technical pursuit and industrial dedication. Our history is defined by key milestones—from the establishment of our Central R&D Center to the acquisition of major patents, such as our internal spring-reinforced graphite technology. Today, with a global footprint spanning the Middle East, Asia, and Europe, our history serves as the strongest proof of our reliability, demonstrating a legacy of safety that the world’s most critical power plants trust every day.
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.
2021 – Present
Global Expansion & Sustainability
2022: Completed major deliveries to the Barakah (UAE) Nuclear Power Plant.
2023: Celebrated 30th Anniversary; launched the “Green Sealing” initiative for emission reduction.
2024: Expanded global representative lines and digitalized the catalog for international partners.
2011 – 2020
Technological Leadership
2014: Secured the KS (Korean Standard) mark for industrial excellence.
- 2016: New Excellent Technology (NET) certification for graphite eye bonnet gaskets.
2017: Patented the Internal Spring-Reinforced Graphite Technology (ALS 1500 Series).
2019: Reached 80% domestic market share in the power generation sealing sector.
- 2020:New Excellent Product (NEP) certification.
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.
2001 – 2010
Growth & Specialization
2005:ObtainedISO 9001 Certification (Quality Management System).
- 2006: Obtained ISO 14001 Certification (Environmental Management).
2008: Established the Central R&D Center to focus on nuclear-grade material science.
2010: Designated as a “Specialized Venture Company” for high-pressure sealing technology.
1993 – 2000
Establishing the Foundation
1993: Foundation of Dongsuh Industry.
1996: Expansion of production lines for Graphite and Metal Gaskets.
- 1997: Localization of Graphite Packing for high-temperature/pressure valve bonnets.
1999: Obtained ISO 9001 Certification (Quality Management System).
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.