Since Seokjin Engineering started in 1986, it has rapidly grown in the field of electronics and environmental engineering. This company supplies the best quality electronic valve products and strives to develop modern digital electronic devices for the home. The company is also making efforts in research and development to create the most superior goods.

Seokjin Engineering entered the market of solenoid valves for coolants in March 1991. In June 1999, the company expanded its business sites by building a factory in the city of Paju, Gyeonggi Province. In November 1994, Lotte Engineering and Machinery signed a contract to purchase parts from Seokjin. In January 2002, they established department for manufacturing water purifiers. The Small and Medium Business Administration of Korea designated Seokjin as an Inno-Biz company. In August 2009, the company was permitted to relocate to the R&D building of the Jeonbuk Carbon Technology Institute. In September 2008, the company agreed to supply humidifiers to Woongjin Cuchen, and has most recently developed a juice and rice wine dispenser.

Its water valve series are small components that are usually used in water purifiers. Its SF-EL 1000 Series can electrolyze water into alkali and acidity. The series is divided into three classes: 3H, 5L and 5H. The SF-EL 1000 Series is used in water purifiers, water softeners, vending machines, water ionizers, dishwashers and home appliances. Its Ultraviolet Filter is designed for water purifiers and water softeners. A Sensory Flow series has the function to check the amount and speed of Flux when fitted on a waterway.
To develop a successful market in China, Seokjin opened a branch in Guangdong. The company also established Yantai Seokjin Electronics as the designated place for the base camp of the mid-east market in China. The agency supplies its products to leading water purifying companies’ in China
Seokjin combines integrated research, development and production into all its innovative ideas. Its customers are promised high quality products and superior service. The employees of Seokjin Engineering are eager to expand into the global market and supply their valued customers with the latest and best products and maintain a successful business relationship with mutual benefits to both buyer and seller.
Seokjin Engineering has been awarded the KOTRA Seal of Excellence since 2010.