SEAMAXX-440

Summary

Product identification

The FilmTec™ Seamaxx™-440 is a seawater reverse osmosis (SWRO) element, specifically a spiral-wound element with a polyamide thin-film composite membrane. It is designed for seawater systems operating at low to medium salinity and temperature, as well as for brackish water with relatively high salinity. This element features a high flowrate to reduce energy consumption.

Key features include:

• A 28-mil feed spacer combining low differential pressure with low cleaning frequency and high cleaning efficiency.
• An oxidative-free membrane manufacturing process for high membrane robustness and long-term stable performance.
• A wide pH range for cleanings (pH 1 – 13) for effective cleaning even with severe fouling.
• Automated, precision fabrication leading to a greater number of shorter membrane leaves, reducing fouling and maximizing element efficiency.

Standard Test Performance (600 psi / 4.1 MPa)

These values are based on the following test conditions: 32,000 ppm NaCl, 600 psi (4.1 MPa), 77°F (25°C), pH 8, 8% recovery.

• Active Area: 440 ft² (41 m²)
• Feed Spacer Thickness: 28 mil
• Permeate Flowrate: 9,050 gpd (34.2 m³/d)
• Stabilized Boron Rejection: 81.8%
• Stabilized Salt Rejection: 99.47%

Notes on 600 psi test:

• Permeate flows for individual elements may vary ± 15%.
• Minimum Salt Rejection is 99.25%.
• Stabilized salt rejection is generally achieved within 24–48 hours of continuous use.
• Active area guaranteed ± 5%.
• Specific boron stabilized rejection is based on test conditions of 32,000 ppm NaCl, 5 ppm boron, 600 psi (4.1 MPa), 77°F (25°C), pH 8, 8% recovery.

Expected Performance (800 psi / 5.5 MPa)

These values are normalized from the 600-psi specification standard test to the following conditions: 32,000 ppm NaCl, 800 psi (5.5 MPa), 77°F (25°C), pH 8, 8% recovery.

• Active Area: 440 ft² (41 m²)
• Feed Spacer Thickness: 28 mil
• Permeate Flowrate: 17,000 gpd (64.4 m³/d)
• Stabilized Boron Rejection: 89%
• Stabilized Salt Rejection: 99.70%

Notes on 800 psi performance:

• Permeate flows for individual elements may vary ± 15%.
• Minimum Salt Rejection is 99.58%.
• Specific boron stabilized rejection is based on normalization conditions of 32,000 ppm NaCl, 5 ppm boron, 800 psi (5.5 MPa), 77°F (25°C), pH 8, 8% recovery.

Operating limits

• Maximum Operating Pressure and Temperature:
  • 1,000 psig (69 bar) at T < 35°C
  • 900 psig (62 bar) at T = 35 – 45°C
• Maximum Element Pressure Drop: 15 psig (1.0 bar)
• pH Range:
  • Continuous Operation: 2 – 11 (Maximum temperature for continuous operation above pH 10 is 95°F (35°C)).
  • Short-term Cleaning (30 min): 1 – 13

Feed water

• Maximum Feed Silt Density Index (SDI): SDI 5
• Free Chlorine Tolerance: < 0.1 ppm (Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Removal by pretreatment is recommended.)
• Standard test conditions for performance include 32,000 ppm NaCl.
• Specific boron rejection tests involve 5 ppm boron in the feed.

Product water

• Permeate obtained from the first hour of operation should be discarded.
• The use of this product does not necessarily guarantee the removal of cysts and pathogens from water; effective removal depends on complete system design, operation, and maintenance.

Mechanical / hydraulic

• Element Dimensions:
  • A (Length): 40.0 in (1,016 mm)
  • B (Internal Diameter): 1.125 in (29 mm) ID
  • C (Outer Diameter): 7.9 in (201 mm)
• The element is designed to fit a nominal 8-inch (203-mm) I.D. pressure vessel.

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

Official datasheet (PDF)

PDF datasheet