January 2, national freezing air conditioner The Equipment Standardization Technical Committee sent good news that Zhejiang Dunan Precision Industry Group Co., Ltd. applied for the national standard formulation project GB/T "High Capacity Piston Electromagnetic" Four-way Reversing valve 》It has been listed in the 2007 national standard formulation plan of the National Standardization Administration.  

The formulation of national standards is conducive to eliminating enterprises that do not meet the standards and improving competition door To improve the industry level, guide and standardize the healthy development of the industry. The successful establishment of this standard will greatly improve the manufacturing level of large capacity four-way valves.