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DESCRIPTION |
Dow Mixed-Bed Ion Exchange Resin MR-450 UPW is a premium-grade, non-separable mixed-bed resin specifically engineered for ultra-pure water (UPW) polishing applications. This resin combines high-purity strong acid cation and strong base anion exchange components in an optimized ratio to achieve the highest levels of water purity required for semiconductor, pharmaceutical, and power generation industries.
Semiconductor Manufacturing: Final polishing for ultra-pure water in wafer fabrication and microelectronics production.
Pharmaceutical Water Systems: Producing Water for Injection (WFI) and highly purified pharmaceutical waters.
Power Generation: Polishing condensate and boiler feedwater in high-pressure power plants.
Laboratory Research: Providing Type I reagent grade water for analytical applications.
Flat Panel Display Manufacturing: Ultra-pure water production for display manufacturing processes.
Manufacturer: Dow Chemical Company (DuPont)
Product Name: DOWEX MR-450 UPW
Type: Mixed-Bed Ion Exchange Resin
Matrix: Polystyrene-DVB (Gel)
Functional Groups: Sulfonic Acid (Cation), Quaternary Ammonium (Anion)
Ionic Form As Shipped: H⁺/OH⁻
Total Exchange Capacity: ≥1.7 eq/L (Cation), ≥0.9 eq/L (Anion)
Moisture Retention: 50-60%
Particle Size Range: 0.4-0.7 mm (≥95%)
Shipping Weight: 700-750 g/L
Uniformity Coefficient: ≤1.2
Maximum Operating Temperature: 60°C
Note: These parameters are specific to ultra-pure water polishing applications.
1. Operating Conditions
Service Flow Rate: 10 - 50 BV/h
Operating Temperature: 5 - 60°C
System Pressure: ≤6 bar
Inlet Water Quality: Pre-treated water with conductivity <1 μS/cm
2. Performance Monitoring
Effluent Resistivity: >16 MΩ·cm (typical), up to 18.2 MΩ·cm
TOC Removal: <5 ppb
Silica Removal: <2 ppb
Sodium Leakage: <0.1 ppb
3. Replacement Indicators
Resistivity Drop: Consistent output below 16 MΩ·cm
TOC Increase: Sustained levels above 5 ppb
Pressure Drop: Significant increase across the bed
Exhaustion: Based on throughput volume and water quality specifications
4. System Design Considerations
Vessel Design: Non-corrosive materials (SS316L or plastic-lined)
Distribution Systems: Designed for uniform flow distribution
Support Media: Properly graded gravel or synthetic media
Ventilation: Adequate for off-gassing during operation
5. Important Considerations
Pre-treatment Requirements: Comprehensive pre-treatment including RO/EDI is essential
Chemical Compatibility: Avoid exposure to strong oxidants and organic solvents
Storage Conditions: Keep in original sealed containers until use
Handling Procedures: Use appropriate personal protective equipment during loading
ADVANTAGES |

Ultra-Low Leachables: Specially manufactured to minimize organic and inorganic leachables, ensuring highest water purity.
Optimized Particle Size Distribution: Uniform bead size provides low pressure drop and excellent hydraulic characteristics.
Rapid Rinse-Down: Quick achievement of required water quality after installation or regeneration.
High Exchange Capacity: Maintains excellent ion exchange capacity while delivering superior purity.
Non-Separable Formulation: Specifically designed to prevent layer separation during shipping and handling.
PACKING |
25Liter Bag
25kg Bag
50kg Plastic Barrel

OUR FACTORY |





| WHY UMEK |
With 28 years in water treatment and 16 years of international market experience, UMEK delivers one-stop solutions trusted in over 120 countries for efficient and reliable results. As the largest industrial water treatment wholesaler in the north, backed by 30+ professionals and a unique culture of mentorship and excellence, we are committed to providing high-quality products and customized services.
We partner with top-tier suppliers like Runxin Valve and Pentair, ensuring certified products with strict quality control. UMEK also offers a value-driven environment, comprehensive training, and growth opportunities, empowering employees and achieving mutual success. Choose UMEK – your partner in expertise, innovation, and sustainable development!

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EXHIBITION |
Water Tech 2023
Water Tech 2023
Water Tech 2024
Canton Fair
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| FAQ |
A1. Why choose UMEK for industrial water treatment solutions?
Q: With 28+ years in water treatment and 16+ years of global expertise, UMEK combines innovation, certified quality, and tailored services. As the largest wholesaler in the north, we deliver trusted solutions across 120+ countries, backed by 30+ professionals and partnerships with industry leaders like Runxin Valve and Pentair.
A2. Are UMEK products certified for international standards?
Q: Yes. All products undergo strict quality control and comply with global certifications (e.g., ISO, CE, WRAS). Our partnerships with top-tier suppliers ensure reliability and performance in diverse industrial applications.
A3. Can UMEK provide customized water treatment solutions?
Q: Absolutely. We specialize in tailored services, designing systems to meet unique client needs. Our team collaborates closely with you to ensure optimal efficiency, cost savings, and compliance.
A4. How does UMEK ensure product quality?
Q: Every product is rigorously inspected, tested, and certified. We work exclusively with vetted suppliers like Runxin Valve and Pentair, adhering to international quality benchmarks at every production stage.
A5. What industries does UMEK serve internationally?
Q: We serve 120+ countries across sectors like manufacturing, energy, municipal water, and agriculture. Our solutions adapt to regional regulations, climates, and operational demands for seamless global delivery.
A6. Does UMEK prioritize sustainability in its solutions?
Q: Yes. Sustainability drives our innovation. We optimize water reuse, reduce chemical waste, and integrate energy-efficient technologies to support clients’ environmental and ESG goals.
A7. What post-purchase support does UMEK offer?
Q: Clients receive lifelong technical support, including system maintenance guidance, troubleshooting, and employee training. Our mentorship-driven team ensures your operational success long after installation