as China valve holding limited. (2008 in United States listed, stock code CVVT) subordinate of Zhengzhou Zheng butterfly valve limited. is China Water Association, and valve Association, and China quality Association members units, national patent model project enterprise, and technology innovation type Enterprise, is development production in the, and low voltage butterfly valve and special valve of professional manufacturer; is in China production large diameter butterfly valve of main production base. in 1997 our company passed ISO9001 quality system certification in 2000, granted by the State administration of quality supervision of special equipment manufacturing license, again in June 2001 by (Norway DNV classification societies) ISO9001 international quality system certification, and in August the same year by United States Petroleum Association API6D product quality certification, in November 2002, EU PED97/23/EC quality certification, 2002 by shenyan access to Henan province health department involved domestic drinking water health security product health permit.2006 year by EU WRAS certification for drinking water in 2007 and ISO14001 international environmental management system certification, the company has the right to export. our company production of "Zheng" brand products in the course of 2005-2007 won "Henan famous brand products", "Henan famous brand" title. at present, the company has become well-known enterprises of China valve industry.

"Zheng" companies with strong technical force promote continuous improvement of enterprise product innovation; with perfect quality assurance system, promoting continuous improvement and upgrading of enterprises, product performance indicators, technology is always in the leading position.

"Zheng Butterfly" brand: bi-directional metal seal butterfly valve, and bi-directional rubber seal butterfly valve, and telescopic type butterfly valve, and liquid control check back butterfly valve, and eccentric hemisphere valve, and three eccentric butterfly valve, and turbine water valve, and stainless steel flat gate, and knife type gate, and ventilation material valve, and oblique sat type hard seal sustained closed check back valve, series valve products (pass diameter DN40--4000mm, Pressure rank PN0.25--4.0Mpa, operation manual, electric, pneumatic, hydraulic, and so on) to adapt to the water supply, drainage, metallurgy, electric power, petroleum, petrochemicals, building materials and other industries and working condition.

"Zheng" brand is our struggling goal, customer satisfaction is our eternal theme. Zheng Dieren "pragmatism, professionalism, integrity and dedication" spirit of enterprise, times, forge ahead, pioneering and innovative, and beyond. in achieving "Cheng" and "on high" resource sharing, complement each other on the basis for development of enterprise scale and to create Chinese valve industry famous brand has laid a more solid foundation!