About Us - 日机密封

About Us


Sichuan Sunny Seal Co., Ltd is the domestic A-share listed company and the leader of China's fluid sealing industry. From focused research to professional marketing and production, from single product to overall solution, we have forty years of inheritance and accumulation, based on strong technical strength, advanced equipments, ”Sunny Seal” is well known in China and gradually step into global market, strive to become a famous brand in China's machinery industry.

Sunny Seal will always adhere to core values of “win-win, coordinated development”, take the customer’s demand as our duty, ensure the safety and protect the environment, make persistent efforts and meet the difficulties, take leaps in the course of development.

Glorious History

In 1978, The predecessor of the Sunny Seal "Sichuan Provincial Machinery Research & Design Institute Seal Technology Research Institute " is established.

In 1993, set up a joint venture“Sichuan Sunny Seal Co.,Ltd” with NIKKISO in Japan.

In 2008, the Japanese side quit, Sunny Seal change from a Sino foreign joint venture to a state-owned company.

IIn 2009, Sunny Seal became a relative state-owned holding company

In 2015, Listed on the Shenzhen stock exchange gem

In 2016, mergers and acquisitions of UTEC

In 2018, mergers and acquisitions of Dalian Sun Seals Ltd


Customize the whole solution of mechanical seal for different equipment and operating conditions.

Provide mechanical seals, dry gas seals, auxiliary (control) systems, rotary jet pumps, rubber and plastic seals and so on for customers.

Sunny Seal has an experienced technology and management team and has established a nationwide marketing network to timely solve the difficult problems in the operation of the unit for customers.


Our products are widely used in petrochemical, coal chemical, oil and gas transport, nuclear power, electricity, hydropower, pharmaceutical, metallurgy, food, shipping, aerospace, military industry and other industries, products are exported to Southeast Asia, Central Asia, the Middle East and other regions. Stable and reliable products ensure that customer equipment is safe, efficient and environmentally friendly, reduce maintenance costs and enhance customer competitiveness.


Committed to internationally renowned

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