1979

TENGLONG SEALING is established by Mr Xu Jifang, mainly manufacturing sealing and thermal insulation products.

1994

TENGLONG SEALING expands to more non-asbestos gland packings and PTFE Products.

1998

In 1998, Fiberglass Products is put into the market.

2000

Ceramic fiber products producing line comes into service.

2001

SUNPASS as the subsidiary company, established by MS. Echo Xu, specialized in the design and manufacturing of ISO tank container spare parts, extends to a new business field different from TENGLONG SEALING.

2002

TENGLONG Sealing is equipped with advanced Germany technology and equipment.

2004

TENGLONG is authorized by ISO organization and executed strictly the process and rules of ISO9001:2008

2008

ECHO INDUSTRY LIMITED is established to provide better exporting service.

2014

TENGLONG moved to a new 6000M2 factory with modern office and workshops.

SUNPASS Joins ITCO.

SUNPASS authorizes 1^st agent in Southeast Asia.

2015

More braiding producing lines are added.

2016

SUNPASS Shanghai Branch is established.

SUNPASS authorizes 2rd agent in Europe.

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.

2018

TOP SEALING is established to provide a better service for customers in sealing and thermal insulation field.

2019

Another 6 sets of braiding production line, imported from Germany, go into operation.

……