Winter Maintenance Measures for Ultrapure Water Systems

In winter, the drop in temperature will cause a certain decrease in the water production of ultrapure water systems. Since water viscosity is affected by temperature, the water production of reverse osmosis membranes will decrease significantly. In addition, due to the reduced water production, the wastewater flow rate will increase accordingly, leading to a higher wastewater ratio. Once the temperature rises, wastewater will decrease, and water production will increase. So how should we maintain ultrapure water systems in winter? Today, we'll give a brief introduction:

I. Operating Environment and Conditions of Ultrapure Water Systems

The operating temperature of ultrapure water systems is 5~45°C, with 25°C being the most suitable operating temperature. When the ambient temperature is below 5°C, please turn on heating or air conditioning in time to take antifreeze measures. When the ambient temperature is below 0°C, please turn off the water system immediately and turn it back on after the temperature rises and you check the condition of the filter cartridges. When the temperature is below 0°C, please open the outer shell of each filter cartridge and drain all residual water. Before restarting, you must check again whether the filter cartridges are frozen. If frozen, please place the filter cartridges in a high-temperature environment to thaw before use.

II. Storage of the Ultrapure Water System and Filter Cartridges

Even in cold winters, the ultrapure water system should be installed and used away from light. If it is to be temporarily out of service, please disconnect the water and power supply, drain the water from the ultrapure water system, and insulate the outside of the system with foam or similar materials when the room temperature is low. Newly purchased pretreatment filter cartridges should be stored away from light and moisture, while reverse osmosis membranes and purification columns should be refrigerated. If the ultrapure water system is planned to be shut down for an extended period, please drain the remaining water from the system, remove the purification column, seal it, and refrigerate it.

III. Troubleshooting for the Ultrapure Water System

If the ultrapure water system freezes, cracks, or leaks, do not panic. Carefully inspect the leak, check for cracks or deformations in the parts, and replace the corresponding parts promptly. If the ultrapure water system freezes, place it in an environment with a room temperature above 10°C and allow it to thaw naturally for 48 hours before turning it on. After turning it on, thoroughly check the system for leaks and any changes in water quality or quantity. If unopened reverse osmosis membranes or purification columns are found to be frozen, place them, along with their packaging, in cold water and soak for at least 24 hours before use. If the ultrapure water system displays abnormalities, first check for leaks, and then replace the corresponding parts and consumables as needed.