+86 574 62837600info@sealings.cn

About Us

Factory Address: No. 78 West Road Zhenxing, Lianghui Econimic Zone, Yuyao, Zhejiang,

Tel: +86 574 62837600 

Fax: +86 574 62837601

E-mail: info@sealings.cn

Shanghai Branch:12th Floor, No.580 Nanjing West Road, Jing'an District, Zhongyi Building,

Shanghai, 200041, China

Tel: 86 21 60322021

Ningbo Office: 8th Floor, Raffles City Square, No. 500 Dazha Road, Jiangbei District, Ningbo, Zhejiang, 315020, China

Home > About Us > History

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In 1979, Tenglong Sealing was established by Mr. Xu, mainly manufacturing sealing and thermal insulation products.







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In 1994, Tenglong Sealing expanded to more non-asbestos gland packings and PTFE Products.








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In 1998, Fiberglass Products were put into the market. 







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In 2000, ceramic fiber products producing line came into service. 






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In 2001, SUNPASS INTERNATIONAL, as the subsidiary company, established by MS. Echo Xu, specialized in the design and manufacturing of ISO tank container spare parts, extending to a new business field different from Tenglong Sealing.






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In 2002, Tenglong Sealing was equipped with advanced Germany technology and equipment







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In 2004, Tenglong was authorized by ISO organization and executed strictly the process and rules of ISO9001:2008







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In 2008, ECHO INDUSTRY LIMITED was established to provide better exporting service.







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In 2014, Tenglong moved to a new 6000M2 factory with modern office and workshops.

Sunpas Joined ITCO.

Sunpass authorized 1st agent in India.






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In 2015, more braiding producing lines were added.







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In 2016, Tenglong/Sunpass Shanghai Branch was established.

Sunpass authorized 2rd agent in Europe.






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In 2017, New producing line of graphite sheets is put into use.

The production line of PTFE- rubber sealing gaskets are enlarged.

The advanced facility and the production, research and development ability enable us to customized high-tech sealing gaskets. 





We are still growing every day!