Welcome: Nanning Deferry Environment Protection and Energy Conservation Co., Ltd.


Deferry continues to pursue and establish our own levels of quality control, our goal is straightforward:Keep low efects across our entire product line,maintaining state-of art laboratory facilities to ensure comprehensive product and manufacturing integrity.

In conjunction with new product design, analytical methods are continually refined to ensure performance is maintained at the highest levels. In the year 2015, Deferry obtained ISO 9001 & ISO 14001 certificate, built strict and precise quality control system to ensure quality requirement in every proceedure:

1). Incoming Inspection
2). Production monitoring & procedure controlling
3). Measurement tools monitoring
4). Failure mode and effects analysis
5). Error Management

6). Complaints handling

7). Data storage and data backup

8). Quality Management System

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