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DunAn Group was founded in 1987 and built up from 900 yuan. After more than 20 years of arduous pioneering, the group has established itself as a region-limitless enterprise group, specializing in equipment manufacturing, explosive chemicals, real estate development, new material development, resource development and other industries. it achieved "The country's Top 500 Enterprises", "Top 500 Chinese Private Enterprises", "100 Most Competitive Enterprises in China". It also ranked Top-100 "2009 Chinese Private Enterprises Wealth Creating List"and "2009 Chinese Private Enterprise' Charity List". With the aim to be the most respected enterpris, DunAn Group adhered to the company philosophy of"create value with responsibility"and "diversification of investment, professional operation and discrepant management", implemented development strategy of "Brand + Innovation" and operation mode of "Industry+Capital" and especially for the strategy of industry transformation and upgrading in 2006, the enterprise has been sustained and rapid development, and the core competition ability and comprehensive strength has promoted ceaselessly, which established its leading position in relating industries.

With the growth over 20 years, DunAn Environment, the core industries in DunAn Group which is top 500 in China, has became public company (Stock title: DunAn Environment, Stock Code: 002011) and professional manufacturer of refrigeration autocontrol components, electric refrigeration central air conditioners (including commercial, particular type, and military applications), in addition to terminal equipment, utilization of renewable energy sources, fans, heat exchangers, refrigeration & freezing equipments, pressure vessels and so on. DunAn Environment is the market leader in refrigeration components industry, the largest manufacturer of service valve in the world and the first company in China which supplies nuclear grade air-conditioners to nuclear power plants using its own intellectual property. Currently DunAn Environment has 4 major businesss which operate in the form of division: Refrigeration Components, Environment Optimization and System Integration, Thermal and Cold Chain, New Energy Resource. DunAn has won the following honors in succession: "Far-famed Trademark in China", "Famous Brand Product in China", "the most Competitive Brand in China", " National Pilot Innovative Enterprise", listed in "the Best Public SMEs " by Forbes Asia, " the 4th Top 50 for Value of China Public SMEs"," 2009 Taurus TOP 100 for China Public Company".

Nantong Dart-Pollrich Fan Co., Ltd is a joint venture between Jiangsu Dart Fan Co.,Ltd. and Pollrich Ventilatoren GmbH in Germany .The predecessor is Nantong Fan Works.It has more than 40 years' experience in manufacturing fans, it is the Large mainstay enterprise in producing all kinds of industry centrifugal fans and blowers. In the national fan industries, it is the first factory that obtained the production license ,and it is the national contracts and keeping promises and an enterprise of high and new technology in Jiangsu Province, a National-level Torch Program implementing unit,the comprehensive economic strength of this company is among the best enterprise in this field.
In April,2010,In order to accelerate the development of industry chain, Zhejiang DunAn Artificial Environmental Equipment Co.,Ltd.mergerred and rereorganized Nantong Dart-Pollrich Fan Co.,Ltd.
The company has already obtained the Quality System Certification of ISO9001:2008 with the main products: all kinds of industrial heavy centrifugal fans, blowers,high-speed blowers,more than 600MW large power station recirculating fluidized bed fans,air cooling fans,metallurgical high temperature anti-fricition fans,fans For petro-chemical,blast-furnace gas excess pressure recovery gas turbine power generation device and minitype compressors and etc.. The products have advanced technology, high-quality,especially in large power station ,petro-chemical technology, coal chemical industry,metallurgy pelletizing industries, the proprietary technology of high-pressure sealing, high temperature,anti-friction fans enjoyed international advanced level
The company gathered first-class standard fan design experts and technology elite of China and Germany, existing two production bases :Tangzha and development zone, it owns eighty thousand square meters production workshop and more than 400 sets of sophisticated production equipments, it is a large-scale comprehensive development , production and sales base in Eastern China.
The company is a leader in product development ,engineering level, product quality,operation and etc.. It provides manufacture ,sales and has the capacity of packaged design and multifunction of large equipped for metallurgy,petro-chemical,mine,coal,coal chemical industry,environmental protection, R&D on national defense and etc.

Pollrich Ventilatoren GmbH, eastablished in 1906,with headquarters in Monchengladbach,Germany, specializing in researching and developing of aerodynamic technology primarily. And it is one of the world's leading fan engineering companies .

Pollrich is your qualified partner that provides customized fans in numerous industies. Especially in some rising industries, such as :
■In waste incineration facilities,Pollrich supplies combustion air to incinerators and exhaust fluid gas desulfurization plants at temperature of as much as 650℃
■In power station,Pollrich designs are used in combustion air, exhaust and recirculation fans.
■In the cement industry,Pollrich supplies Kiln& head fans
■In the glass industry,fans are exposed to temperatures of up to 1000℃
■In the automoblie industry,Pollrich fans have their high effciency and low maintenance levels.
■In the paper and malt industry, Pollrich fans are used in the drying process.
■Pollrich fans are used for a wide range of applications in the textile and wood processing industries. Meanwhile, Pollrich offers a complete program of industrial fans:
■Standard lightweight radial-flow fans for discharge pressure up to 5000pa
■Heavy-duty & high pressure fans (up to 20000pa)
■Plug- in fans
■Blowers and induced draft fans
■Special fans: we can fix the special precept on processing technic & technical according to the customer's requirements.