Well water, river water, spring water and sea water are all hard water, have not been softened, and cannot be used as tractor cooling water. Otherwise, scale will be generated in the engine water jacket, which will affect the cooling water effect.
Snow water and rain water are natural soft water and can be used directly as mechanical cooling water. Hard water must be softened before it is used as cooling water. Treatment method: First, boil the water and use it after sedimentation; secondly, add caustic soda or soda ash or trisodium phosphate softener in hard water, add 7 g of caustic soda per 10 liters of water, or 5-10 g of soda ash, or 20-30 Trisodium phosphate.
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