1969 Mr. Wu founded Danyong Labour Valve Co., Ltd. Mainly produce, develop and sales industrial gas cylinder valves and pipeline valves. Was the leading manufacturer of industrial gas valves.

1981 Established a brass melting and producing plant. Its quality is superior to industry standard.

1986 Relied to full and mature technic experience and understanding on gas industry, it developed gas mixers, gas regulators, gas collecting bars, its products are widely used in related industry because of fine quality.

1998 Invested one cylinder factory, start the production, R&D and sales on gas cylinders.

1999 Started the business of seamless steel cylinders.

2002 Started the project of fire-extinguishing, medical and diving breathing apparatuses.

2005 Business of seamless wrapped gas cylinders started.

2006 Cooperated with a famous NGV system company and began the development, production and sales of CNG valves, CNG regulators. Relied on its excellent and stable quality, it had became the leading supplier in China.

2007 Started the production of cryogenic valves, regulators and accessories.

2008 The exclusive export and international service company was established.

2009 Annual export amount reach to USD2, 000, 000.

2011 Start to develop, produce LNG fuel system of NGV.

2012 High purity gas, electrical gas instruments and accessories project started.

Now Gressence has became a professional compound of developing, manufacturing and selling on manifold gas accessories and equipments. Armed with professional techincal experiences, it is devoted to provide powerful support and one stop solutions to gas applications and gas system establishment of clients.

Gressence is always doing the best to bring values to customers.