Laboratory ultrapure water machines are roughly divided into four units: pretreatment, reverse osmosis, ion exchange, and terminal ultrafiltration. Tap water first passes through the pretreatment unit to remove larger particles, suspended solids, and some organic matter. It then enters the reverse osmosis unit, where ionic substances and macromolecular materials (such as viruses, microorganisms, etc.) are intercepted and removed. Afterwards, it goes through the ion exchange unit to purify and ultrapurify the residual trace ions left after membrane removal, reducing the ion content in the water to trace levels. Finally, technologies such as UV and ultrafiltration ensure that microorganisms, organic matter, and pyrogens in the ultrapure water meet the requirements of various experimental applications. Ultrapure water machines use methods such as pretreatment, reverse osmosis technology, ultrapurification treatment, and post-treatment to almost completely remove conductive media from the water and reduce non-dissociating colloidal substances, gases, and organic matter to very low levels. Ultrapure water machines are also known as: ultrapure water devices, ultrapure water equipment, ultrapure water instruments, ultrapure water systems, laboratory ultrapure water devices, etc. The resistivity of ultrapure water produced by ultrapure water machines should generally be greater than 10 megohms; water above 10 megohms is called ultrapure water. High-quality ultrapure water output can reach 18.25 megohms.
Introduction to the Functions of Xinrui Ultrapure Water Machines

1. Control function: Fully automatic touch screen display controller with animated flowcharts, displaying and monitoring the operational status of each water treatment unit in real time;
2. Online display of operational status and parameters: Online display of flow rate, online display of pressure, online monitoring and digital display of source water and product water quality, etc., providing real-time understanding of equipment operation for easy monitoring and analysis of system status;
3. Equipped with automatic protection and alarm functions: Self-check on startup, water shortage protection alarm, automatic reset after power failure, automatic shutdown protection and handling for high and low pressure, system linkage—if a local issue occurs in the system, it automatically shuts down, etc.;
4. The reverse osmosis host has an RO membrane anti-scaling program design function, performing timed cyclic flushing of the RO membrane surface to effectively protect RO membrane operation;
5. Fully automatic control of all tank liquid levels: The connection between intermediate tanks, pure water tanks, and equipment not only achieves linkage but also protects each pump from idling and damage;
6. Online monitoring of product water quality and recycling treatment of non-compliant water: To ensure water quality at the point of use meets requirements, the host's product water quality is monitored online in real time, with a water quality feedback device in place for recycling and reprocessing non-compliant water;
7. Equipped with an automatic pipeline flushing function, periodically cleaning the pipelines to maintain internal cleanliness. During pipeline flushing, water can be directly discharged or returned to the water production host for reuse to conserve water resources.

Performance Characteristics of the RUPF Series Ultrapure Water Machines
Automatic backflush function on startup
Low-pressure alarm shutdown protection, automatic cessation of water production when the tank is full
Simultaneous online monitoring of two water quality paths, real-time monitoring of pure and ultrapure water quality
No-water alarm, full-water alarm, providing safety assurance
Fully automatic RO membrane anti-scaling flushing program extends RO membrane lifespan, automatic backflush on startup, automatic flushing during standby when the tank is full
Dual-quality water extraction, one machine with dual uses (can extract two streams of pure water simultaneously)
Multiple specifications of water storage tanks available to meet different needs
Ergonomically designed chassis, compliant with GLP standards
All pipelines are NSF certified, with new plug-in connectors for easier filter column replacement and maintenance
Original imported nuclear-grade resin, fully descending flow ultrapurification column design, ensuring top-tier water quality at all times
Online monitoring of water path temperature
Dual-wavelength (185nm&254nm) imported UV lamp, effectively sterilizing, reducing TOC, and expanding system applicability
Original imported 0.45μm PES polyethersulfone composite membrane terminal sterilization filter, ensuring sterile water quality
Ultrapure water constant pressure system
Automatic startup after water use with enhanced pretreatment
Working Principle of Xinrui Laboratory Ultrapure Water Machines


The working principle of laboratory ultrapure water machines involves tap water undergoing pretreatment through precision filter cartridges and activated carbon filter cartridges to filter out particles such as sediment and adsorb odors, making the tap water cleaner. It then passes through a reverse osmosis device for water purification and desalination. The purified water is stored in a storage tank, with water quality reaching national三級 water standards, while wastewater from the reverse osmosis device is discharged. Reverse osmosis purified water undergoes deep desalination treatment through a purification column to obtain Grade 1 water or ultrapure water. Finally, if the user has special requirements, UV sterilization or microfiltration/ultrafiltration devices are added after the ultrapure water stage to remove residual bacteria, particles, pyrogens, etc. Precision filter cartridges, activated carbon filter cartridges, reverse osmosis membranes, and purification columns are materials with relative lifespans. Precision and activated carbon filter cartridges actually protect the reverse osmosis membrane. If they fail, the load on the reverse osmosis membrane increases, shortening its lifespan. If operation continues, the quality of the produced pure water declines, increasing the burden on the purification column and shortening its lifespan. The ultimate result is an increase in the operating cost of the ultrapure water machine.
Workflow示意:
Tap water → PP cotton filter cartridge → Carbon powder filter cartridge → PP cotton filter cartridge → Booster pump → Reverse osmosis R.O. unit → Pure water → Ultrapurification unit → Pure water/ultrapure water outlet