Duracon RO5 series

Summary

Product identification

The Duracon RO5 Series are proprietary thin-film reverse osmosis (TFM*) membrane elements from Veolia, characterized by high sodium chloride rejection and compatibility with hot water sanitization (HWS).

Key features:

• High rejection: The A-series membrane achieves an average rejection of 99.2% on 2,000 ppm NaCl at 25°C and 225 psi.
• High flux rates: Delivers high flux at operating pressures up to 1,200 psi (8,274 kPa).
• Sanitary design: Designed for daily Clean-In-Place (CIP) and periodic hot-water sanitation while maintaining element integrity.
• Construction: Features a Durasan* Cage patented outerwrap, standard feed spacers, and polysulfone parts.
• Compliance:
  • FDA Regulations (relevant sections of 21CFR)
  • EU Framework 1935/2004/EC
  • Halal & Kosher certification

Typical applications include concentrating sugar in food-related processes requiring stringent sanitary procedures, protein and sugar concentration, lactose recovery, and wastewater applications requiring reduction of BOD.

Operating limits

• Typical Operating Pressure: 200 - 800 psi (1,379 - 5,516 kPa)
• Maximum Operating Pressure: 1,200 psi (8,276 kPa)
• Maximum Temperature: 122°F (50°C)
• Sanitization Temperature: 194°F (90°C)
• pH Range: 3.0-10.0
• Maximum Pressure Drop:
  • Over an element: 15 psi (103 kPa)
  • Per housing: 60 psi (414 kPa)
• Chlorine Tolerance: 500 ppm-hours (dechlorination recommended)
• Operating Pressure-Temperature Product: Operating pressure in bar multiplied by operating temperature in degree Celsius should not exceed 2000.

CIP limits for RO elements

Feed water

• Initial Flushing: Prior to first use, new elements must be flushed with clean water (RO permeate strongly preferred) for at least an hour at a transmembrane pressure of not more than 45 psi (3 bar) to remove residual chemicals.
• Hot Water Sanitization Pre-requisite: If new elements are to be hot water sanitized before first use, the system must be flushed at a low transmembrane pressure (up to 45 psi / 3 bar) for a minimum of 24 hours prior to sanitization. The system must be started and in operation for a minimum of 24 hours prior to hot water sanitization.
• Feed Water Quality for Flushing: If RO permeate is unavailable, feedwater which does not foul or form scale on the membrane can be used, but only after appropriate filtration. Note that the solubility of some inorganics, such as CaCO₃ and, above 45°C, CaSO₄, decreases with increasing temperature.

Product water

• A-series Rejection: 99.2% on 2,000 ppm NaCl at 25°C and 225 psi.
• Typical Operating Flux: 5-20 GFD (8-34 LMH).
• Clean Water Flux (CWF): 14 GFD (24 LMH) @ 225 psi. CWF can vary ±25% and should be monitored after each cleaning cycle.
• Permeate Flow Loss: Repeated 90°C sanitization cycles may lead to a loss of permeate flow rate. Under optimum conditions in a controlled environment with deionized water, approximately 30% of the original permeate flow rate was lost before performance stabilized (over 90% of this reduction occurred during the first heat treatment). This loss often corresponds with an increase in salt rejection.

Mechanical / hydraulic

Dimensions and Weight

Model Specifications

Hot Water Sanitization Parameters

• Transmembrane pressure: Not exceeding 45 psi (3 bar) during sanitization.
• Temperature Ramp Rate: Increase/decrease temperature at a rate not higher than 5°C (9°F) per minute.
• Pressure Drop during sanitization: Cross flow should be adjusted so pressure drop is not more than 2 psi per element or 10 psi per housing.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions present in the original OEM PDF datasheet. For contractual data and complete information, the specific OEM PDF revision used on your project must be consulted.

Official datasheet (PDF)

PDF datasheet