The Challenge

A northern New England-based advanced manufacturing firm generated low conductivity water for several key processes with an aging two-column deionizer. The unit was failing to dose hydrochloric and hydroxide properly resulting in inconsistent conductivity. With more systems coming online, the company needed additional capacity for expansion. They also wanted to move away from the HCl and OH required for regeneration of the two column system.

Our Solution

The need to replace an antiquated deionizer (often referred to as a two-column deionizer, or two bed deionizer) is frequently encountered in New England. Many of these deionizers are 40+ years old. When it comes time to replace this equipment, reverse osmosis (RO) is often a consideration as end users are typically eager to eliminate hydrochloric and caustic on site. RO is a much cleaner and safer alternative that often generates equal or greater water quality.

In this instance, Pure Flow designed a 20 GPM reverse osmosis-based system to allow for increased capacity beyond the legacy deionizer and the elimination of HCl and OH at the site. The final solution included the following key components:

  • Multimedia Filter for sediment removal to 10 microns – Pentair tank, Fleck valves
  • Carbon filtration for chlorine removal – Pentair tank, Fleck valves
  • Suez E4-H Reverse Osmosis
  • Storage tank and demand pump (Grundfos CME Series) package for distribution to points of use

Pure Flow also worked with the customer to eliminate the need for on-site RO clean in place (CIP) in order to avoid any chemical discharge from the equipment. As a feature of our preventative maintenance service offerings, Pure Flow is capable of performing offsite RO membrane cleanings.