SNJ係列用於(yu) 降低水中的硬度。生水由上而下通過交換器進行軟水，水中含苞欲放有的鎂、鈣、陽離子與(yu) 水交換劑的鈉離子互相交換；生水被軟化成為(wei) 含極少的鈣、鎂、鹽類的水（稱為(wei) 軟水），可用於(yu) 鍋爐給水及一些工業(ye) 用水。由於(yu) 鈉離子在水中有很大的溶解性。
離子交換器（水處理設備）是用於(yu) 降低水中的硬度。生水由上而下通過交換器進行軟水，水中含苞欲放有的鎂、鈣、陽離子與(yu) 水交換劑的鈉離子互相交換；生水被軟化成為(wei) 含極少的鈣、鎂、鹽類的水（稱為(wei) 軟水），可用於(yu) 鍋爐給水及一些工業(ye) 用水。由於(yu) 鈉離子在水中有很大的溶解性。不會(hui) 在鍋爐內(nei) 部結成硬垢，並且容易排除。進入鈉離子交換器的水。應經澄清過濾處理，基本上不含有懸浮物。經交換器軟化後。其剩餘(yu) 硬度不超過0.03毫克當量/升。
The exchanging device is for reducing the hardnes of hard water. Raw water goes through the exchanger from top to bottom, to be softened by the sodium iomexchanger inside the device. The positve ions of magneslum and calcium are exchanged with that of sodium. Then the raw water becomes soft water contiaing very few ions of magnesium and calcium. The soft water can be used for feeding water of boiler and for some hard sediment in the boiler and can be easily removed. Raw water shall be filtered and settled with almost on suspended before coming into the lonechaging device. After being softened in the device, the water shardness shall be less than 0.03mg equiwalent/1.
外形結構參數變化恕不另行通知，歡迎來函。
