AK-440

Summary

Product identification

The AK HR Series features high rejection, low energy brackish water RO elements. These A-Series proprietary thin-film reverse osmosis membrane elements are characterized by high flux and high sodium chloride rejection.

The AK HR Series is certified to NSF/ANSI 61.

• Model: AK-440
• Membrane: Thin-film membrane (TFM)
• Part number: 3056681
• Outer wrap: Fiberglass
• Type: Female

Product water

AK HR elements produce permeate quality close to a standard brackish membrane element at a much lower pressure, allowing for significant energy savings.

• Average permeate flow: 12,000 gpd (45.4 m³/day)
• Average rejection: 99.5%
• Minimum rejection: 99.0%

Testing conditions for performance data: 500 ppm NaCl solution at 115 psi (793 kPa) operating pressure, 77°F (25°C), pH 7.5 and 15% recovery. Individual flow rate may vary ±20%. Stabilized salt rejection is after 24 hours of operation.

Mechanical / hydraulic

• Active area: 440 ft² (40.9 m²)
• Feed Spacer: 28 mil
• Dimensions:
  • A: 40.0 inches (101.6 cm)
  • B: 1.125 inches (2.86 cm)
  • C: 7.9 inches (20.1 cm)
• Boxed Weight: 35 lbs (16 kg)

Operating limits

• Typical Operating Pressure: 120 psi (830 kPa)
• Typical Operating Flux: 10-20 GFD (15-35 LMH)
• Maximum Operating Pressure: 600 psi (4,136 kPa)
• Maximum Temperature:
  • Continuous operation: 122°F (50°C)
  • Clean-In-Place (CIP): 122°F (50°C)
• pH Range:
  • Optimum rejection pH: 7.0-7.5
  • Continuous operation: 2.0-11.0
  • Clean-In-Place (CIP): 1.0-13.0
• Maximum Pressure Drop:
  • Over an element: 15 psi (103 kPa)
  • Per housing: 50 psi (345 kPa)
• Chlorine Tolerance: 1,000+ ppm-hours; dechlorination recommended

Feed water

These elements are recommended for low brackish water with salt concentration (TDS) levels up to 5,000 mg/l.

• NTU: < 1
• SDI₁₅: < 5

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original PDF datasheet. For contractual data, please refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet