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 ion_exchanger inside the device.The positve ions of magnesium and calcium are exchaged 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 industral uses.Due to its high dissolving ability in water,sodium ions will not form hard sediment in the boiler and can be easily removed.Raw water shallbe filtered and setted with almost on suspended before coming into the Lonechaging device.After being softened in the device,the water"s hardness shall be less thean 0.03mag equivalent/:.The production capacity:1-100/h