Dayton Water Systems’ Ultra Pure DI tanks are identified by model and batch numbers beginning with the number 5. These tanks are readily identifiable by red tops or the red tape at the top of the tank. Strict guidelines and procedures are followed to ensure the quality of the UltraPure DI tanks. Our internal procedures go a step further to ensure that these tanks are literally bacteria and pyrogen free.

In order to preserve the integrity of the UltraPure tanks, the installation and distribution of them are controlled. UltraPure tanks may not be distributed by dealers or installed as polishing tanks to Dual Beds or Standard tanks. As well, these tanks should not be installed in dirty industrial areas where the possibility of contamination may occur and the ascetics of the tank are diminished.

Mixed-bed resin is a mix of 40% strong acid cation resin in the hydrogen form and 60% strong base Type I anion resin in the hydroxyl form. This resin mixture produces very high quality deionized water. Type I anion resin is very effective at removing silica from the water.

UltraPure resin can produce high quality deionized water, up to 18 meg ohm, depending upon certain conditions. These conditions include flow rate, feed water quality, the system set up, condition of the resin, and the amount of time the system sets idle. We guarantee UltraPure resins in the 1 and 3 Cu. Ft. vessels will produce at least 16 meg ohm initially before exhaustion of the resin bed begins.

Capacity of UltraPure resin is a maximum of 12,000 grains removal per Cu. Ft. High quality cut off of 200,000 ohms and above have an affect on the capacity of the deionizer exchange tank. Generally, we reduce the capacity by approximately 20% or 10,000 grains removal per Cu. Ft. when the quality cut off is 200K and above. As resin begins to exhaust, the quality gradually declines. For this reason, there is about 20% of the resin’s capacity which will produce deionized water of quality below 200,00ohms.

Recirculating systems will also have an affect on the capacity of the exchange tank. A recirculating system is set up to maintain high quality process waters. Water enters the recirculating loop from a RO system or even a raw water supply. The loop contains DI exchange tanks and a recirculating pump to continually pump water through the loop. As the water recirculates through a pluming loop it returns to the deionizers with some sontaminants which will be removed by the deionizers.