AK-90 H

Summary

The AK H Series consists of thin-film reverse osmosis (RO) elements designed for high performance, high rejection, and ultra-low energy operation. These brackish water elements provide very high rejection of uncharged and lightly charged species, including silica and many micropollutants. They are certified to NSF/ANSI/CAN 61.

Product identification

These elements are suitable for applications such as drinking water treatment for removal of emerging contaminants and second-pass RO systems for further polishing by ion exchange or electro-deionization.

The membrane is a thin-film polyamide (TFM).

• AK-90 H
  • Part number: 3194886
  • Average permeate flow: 2,250 gpd (8.5 m³/day)
  • Typical NaCl rejection: 99.65%
  • Minimum NaCl rejection: 99.40%
  • Active area: 90 ft² (8.3 m²)
  • Outer wrap: Fiberglass
  • Feed spacer: 31 mil
  • Type: Male
  • Dimensions:
    • A: 40.0 inches (101.6 cm)
    • B: 0.75 inches (1.9 cm)
    • C: 3.9 inches (9.9 cm)
  • Boxed weight: 9 lbs (4 kg)
• AK-400 H
  • Part number: 3150326
  • Average permeate flow: 11,000 gpd (41.6 m³/day)
  • Typical NaCl rejection: 99.65%
  • Minimum NaCl rejection: 99.50%
  • Active area: 400 ft² (37.2 m²)
  • Outer wrap: Fiberglass
  • Feed spacer: 31 mil
  • Type: Female
  • Dimensions:
    • A: 40.0 inches (101.6 cm)
    • B: 1.125 inches (2.86 cm)
    • C: 7.9 inches (20.1 cm)
  • Boxed weight: 40 lbs (18 kg)
• AK-440 H
  • Part number: 3150327
  • Average permeate flow: 12,000 gpd (45.4 m³/day)
  • Typical NaCl rejection: 99.65%
  • Minimum NaCl rejection: 99.50%
  • Active area: 440 ft² (40.9 m²)
  • Outer wrap: Fiberglass
  • Feed spacer: 28 mil
  • Type: Female
  • Dimensions:
    • A: 40.0 inches (101.6 cm)
    • B: 1.125 inches (2.86 cm)
    • C: 7.9 inches (20.1 cm)
  • Boxed weight: 42 lbs (19 kg)

(Note: Average salt rejection values are after 24 hours of operation. Individual flow rate may vary ±20%.)

Operating limits

• Typical operating pressure: 100 psi (689 kPa)
• Maximum operating pressure: 400 psi (2,756 kPa)
• Typical operating flux: 10-20 GFD (15-35 LMH)
• Maximum temperature:
  • Continuous operation: 122°F (50°C)
  • Clean-In-Place (CIP): 122°F (50°C)
• pH range:
  • Optimum rejection: 7.0-7.5
  • Continuous operation: 2.0-11.0
  • Clean-In-Place (CIP): 1.0-12.0
• 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

• NTU: < 1
• SDI₁₅: < 5

Product water

Testing conditions for permeate flow and NaCl rejection: 500 ppm NaCl solution at 115 psi (793 kPa) operating pressure, 77°F (25°C), pH 7 and 15% recovery.

Mechanical / hydraulic

Elements are wet tested. 8-inch diameter elements are preserved in a 1% weight sodium bisulfite solution and vacuum packed. 4-inch diameter elements are packaged with oxygen scavenger packets in oxygen barrier bags.

Storage temperature should be below 35°C (95°F), avoiding freezing and direct sunlight. After installation, elements should be kept wet, and a compatible preservative used for storage longer than 7 days. During initial start-up, the first permeate should be discharged to drain for 30 minutes. Permeate back pressure must not exceed feed pressure. Elements should be maintained in a clean condition. Cleaning is recommended if pressure drop increases by 20% or water permeability decreases by 10%, using only compatible chemicals.

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data should always match the OEM PDF revision used on the project.

Official datasheet (PDF)

PDF datasheet