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Demineralizer Regeneration Frequency Determination
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Routinely, I am asked how long will one of our cation-anion two bed demineralizers operate before it has to regenerate. To determine this, we need to know the flow rate and the inlet water quality.  The flow is generally known, but the water quality generally is not early in a water treatment project.  The easiest way


Dealkalizer Shipped to University in Massachusetts
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A triple dealkalizer was shipped this week is the last major piece of equipment for a major steam boiler upgrade at a university in Cambridge, Massachusetts which included a new condensate polisher system Res-Kem provided, a deaerator and other major physical plant upgrades.  The months between the polisher shipment and the dealkalizer shipment were filled with


DI System Shipping to Washington Chemical Plant
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Shipping today is a two bed (cation ion exchange tank followed by an anion ion exchange tank) demineralizer for a chemical plant in Washington State. This unit is a DI60072 and will be used in parallel with several other older systems currently installed at the same plant to increase treated water capacity. 150 gpm Demineralizer


New Two Bed Demineralizer Technical Bulletins
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Res-Kem has a complete 2-Bed demineralizer product line designed for industrial water production.  The standard tank sizes range from 18″ to 96″.    Two-Bed Demineralizer withPVC Tank Coating and PVC Face Piping These two-bed deionizers are designed for fully or semi-automatic production of water with a conductivity of less than 10 micro-ohms and feature:   Flow rates


Reduce Your Backwash Flow or Lament “Why is my ion exchange resin in the drain?”
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It is that time of year.  You must reduce your backwash flow in the Fall or you will find your ion exchange resin in the drain or waste treatment plant. Why do I need to reduce my backwash flow rate? If the backwash rate for an ion exchange system is set when the water is warm, the flow


Common Anion Resin Foulants
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In a previous blog, we discussed common cation resin foulants. Here are some typical issues that we see with anion resin. Organics: Surface waters, such as rivers, streams, reservoirs, lakes, etc, can contain hundreds of PPM of natural and man-made organic matter. Natural organics are commonly formed from decaying vegetation. This decaying vegetation includes tannins,


Ion Exchange Resin Testing & Analysis Services
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Test your ion exchange resin to monitor and maintain your water treatment systems such as softeners, dealkalizers, condensate polishers, deionizers or demineralizer systems. You should have the resin analyzed on a yearly basis to check the quality and performance of the resin. Samples can be taken from the resin bed and sent to Res-Kem to


Dealkalizer Performance Calculations
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We recently had questions about a perceived problem with a dealkalizer. This customer believed the capacity of the dealkalizer was lower than originally specified and was unhappy with its performance. The customer was regenerating this new system more often than they regenerated the older system. We reviewed the system design and operation and found the



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