1. What is the limit of hardness of water to clean glass?
Water with a hardness greater than 200 ppm of dissolved solids is the limit for separate lists in the glass washing. Water with a higher value should be treated or purchase treated water. Notes
QA (Quality Audit = audit quality):
For areas where water quality is hard (high level of dissolved solids => 200 ppm), use of deionized or demineralized water for flushing system final. The dissolved solids in water can cause the formation of a film on the glass surface, which can interfere with adhesion of sealant to glass.
A simple test to control the hardness of the water is wet with water drops a piece of clear glass. Air dry. Once the water has evaporated, if there are stains or marks on the glass drops because the water contains a high amount of dissolved solids.
2. What are the top three water treatment systems?
This is a complicated question, depending on what is in the water supply, although only referred to the hardness of water, then the following treatment systems would be the best:
a) DI = deionized water (deionized water): (THE BEST)
This water treatment system will completely remove all minerals from water. TDS = 0 ppm. This can be a very expensive solution if the water has high TDS. Mostly used a recirculation system with an activated carbon filter in the final rinse to reduce water loss and the cost of operation.
This is above what is needed for the manufacture of DVH.
b) RO with DI = Reverse Osmosis (RO) with final rinse of deionized water (VERY GOOD)
treatment system by reverse osmosis remove ~ 95% of mineral water. TDS ~ 0 - 30ppm. Most systems will be of 0 - 20ppm. The activated carbon and final rinse with deionized water recirculated, have 0 ppm.
Note:
Water "clean (free spot)" is 20 or less.
This is the preferred treatment system for dual-insulating glass manufacturers, as the RO system will minimize the calcification in the washing system and heater, while the final rinse with deionized water and recirculated carbon filter enabled is 0 ppm, considering that is the last touch glass water before drying and use. The recirculation system will keep the system operating costs under control. This system has a high initial cost, but long term is very competitive. The RO system can also leased some water treatment companies.
c) RO = Reverse Osmosis (RO): (GOOD)
The water treatment system for reverse osmosis remove ~ 95% of mineral water. TDS ~ 0 - 30ppm. Most systems give 0 - 20ppm.
Note:
Water "clean (free spot)" is 20 or less.
This is a good system if the water treatment needs do not exceed the capacity of the treatment system. Generally, this system only uses treated water for final rinse.
This system has a significant initial cost, but over time it becomes very competitive. The RO system can also be leased to a water treatment company.
Comments:
Smoothing Water: (Not recommended for the manufacture of insulating glass)
The water softener, softened water does not reduce the level of TDS in the water, but simply exchanges a sodium ion and calcium, etc. The sodium ion is more soluble and therefore reduces the accumulation in the spray bars in the washing section and the heater.
solubility becomes a problem for the manufacturer when a film of mineral is left in the glass and is likely to be re-dissolved if water does get in the pocket placement, resulting in seal failure faster than if Untreated water.
Filtering filtration does not reduce the TDS, as only the suspended particles are filtered. The filters are good for pre-wash sections re-circulated and washing, because that is where most of the particles or waste materials are washed glass and recycle this water can be deposited again. Filtration in the first rinse recirculation systems not harmful, but is less effective because the rinse water should be clean. As treated water saving measure, it is recommended to use filters to trap the first washing. This will increase the life of the water and reduce waste is
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