Low 3

Summary

Product identification

The Oltremare LOW3 series consists of low energy, high-productivity brackish water reverse osmosis (RO) membrane elements. These spiral-wound elements are available in standard 2.5” and 4” designs, used for producing drinking water and industrial water.

Membrane Characteristics

• Membrane: RO
• Membrane Type: Polyamide
• Stabilized Salt Rejection: 98.5%(b) – 98.8%(c)
• Minimum Salt Rejection: 97.0%(b) – 98.0%(c)

(b) Minimum and stabilized salt rejection for modules from 2514 to 4021. (c) Minimum and stabilized salt rejection for module 4040.

Design Information

• Oltremare LOW3 – 2514
  • Permeate Flow: 0.76 m³/day (200 gpd)(a)
  • Maximum Feed Flow: 1.38 m³/h (6 gpm)
  • Membrane Area: 0.6 m² (6 ft²)
  • Feed Spacer Thickness: 28 mil
• Oltremare LOW3 - 2521
  • Permeate Flow: 1.6 m³/day (420 gpd)(a)
  • Maximum Feed Flow: 1.38 m³/h (6 gpm)
  • Membrane Area: 1.1 m² (12 ft²)
  • Feed Spacer Thickness: 28 mil
• Oltremare LOW3 - 2540
  • Permeate Flow: 3.4 m³/day (900 gpd)(a)
  • Maximum Feed Flow: 1.38 m³/h (6 gpm)
  • Membrne Area: 2.6 m² (28 ft²)
  • Feed Spacer Thickness: 28 mil
• Oltremare LOW3 - 4014
  • Permeate Flow: 2.35 m³/day (620 gpd)(a)
  • Maximum Feed Flow: 2.72 m³/h (12 gpm)
  • Membrane Area: 1.8 m² (19 ft²)
  • Feed Spacer Thickness: 28 mil
• Oltremare LOW3 - 4021
  • Permeate Flow: 4.54 m³/day (1200 gpd)(a)
  • Maximum Feed Flow: 2.72 m³/h (12 gpm)
  • Membrane Area: 3.2 m² (35 ft²)
  • Feed Spacer Thickness: 28 mil
• Oltremare LOW3 - 4040
  • Permeate Flow: 11.4 m³/day (3000 gpd)(a)
  • Maximum Feed Flow: 3.6 m³/h (16 gpm)
  • Membrane Area: 7.9 m² (85 ft²)
  • Feed Spacer Thickness: 28 mil

(a) Test conditions: 1,500 ppm NaCl, 10.3 bar (150 psi), 25°C (77°F), 15% recovery, pH 6.5 - 7, 30 minutes operation. Flow rates will be no more than 15% below the values shown.

Operating limits

• Maximum Operating Pressure: 41 bar (600 psi) for fiberglassed, 20.7 bar (300 psi) for tape wrapped(d)
• Maximum Operating Temperature: 45 °C (113 °F)
• Cleaning pH Range: 1.0 – 12.0(e)
• Chlorine Tolerance: < 0.1 ppm(f)
• Maximum Pressure Drop: 0.7 bar (10 psi) per element; 4 bar (60 psi) per housing
• Maximum SDI₁₅: 5.0
• Maximum Turbidity: 1 NTU

(d) Models from 2514 to 4040 can be both fiberglassed and tape wrapped. (e) Refer to temperature and pH limits in Membrane Cleaning Guide - Water Application Elements (TSG-C-001). (f) Pretreatment is recommended for the removal of free chlorine and other oxidizing agents to prevent damage to membranes.

Mechanical / Hydraulic

• Oltremare LOW3 – 2514
  • Element Weight: 0.45 kg (1 lb)(g)
  • Dim. A: 355.6 mm (14 inches)
  • Dim. B: 61 mm (2.4 inches)
  • Dim. C: 19.1 mm (0.75 inches)(h)
  • Permeate Tube: Male(i)
  • Dimension “D” (protruding permeate tube): 30.5 mm (1.2 in)
• Oltremare LOW3 - 2521
  • Element Weight: 0.9 kg (2 lb)(g)
  • Dim. A: 533.4 mm (21 inches)
  • Dim. B: 61 mm (2.4 inches)
  • Dim. C: 19.1 mm (0.75 inches)(h)
  • Permeate Tube: Male(i)
  • Dimension “D” (protruding permeate tube): 30.5 mm (1.2 in)
• Oltremare LOW3 - 2540
  • Element Weight: 1.8 kg (4 lb)(g)
  • Dim. A: 1016 mm (40 inches)
  • Dim. B: 61 mm (2.4 inches)
  • Dim. C: 19.1 mm (0.75 inches)(h)
  • Permeate Tube: Male(i)
  • Dimension “D” (protruding permeate tube): 30.5 mm (1.2 in)
• Oltremare LOW3 - 4014
  • Element Weight: 1.4 kg (3 lb)(g)
  • Dim. A: 355.6 mm (14 inches)
  • Dim. B: 100.3 mm (3.95 inches)
  • Dim. C: 19.1 mm (0.75 inches)(h)
  • Permeate Tube: Male(i)
  • Dimension “D” (protruding permeate tube): 30.5 mm (1.2 in)
• Oltremare LOW3 - 4021
  • Element Weight: 1.8 kg (4 lb)(g)
  • Dim. A: 533.4 mm (21 inches)
  • Dim. B: 100.3 mm (3.95 inches)
  • Dim. C: 19.1 mm (0.75 inches)(h)
  • Permeate Tube: Male(i)
  • Dimension “D” (protruding permeate tube): 30.5 mm (1.2 in)
• Oltremare LOW3 - 4040
  • Element Weight: 3.6 kg (8 lb)(g)
  • Dim. A: 1016 mm (40 inches)
  • Dim. B: 100.3 mm (3.95 inches)
  • Dim. C: 19.1 mm (0.75 inches)(h)
  • Permeate Tube: Male(i)
  • Dimension “D” (protruding permeate tube): 26.7 mm (1.05 in)

(g) Shipping weight is dependent on packaging material and quantity shipped. (h) For female elements, “C” is the inner diameter. For male elements, “C” is the outer diameter. (i) Male elements have a protruding permeate tube.

Important Information

• Start-up: It is recommended to flush elements for 30 minutes at low pressure and discard permeate during the flush prior to operation.
• Cleaning: Oltremare membrane elements require periodic cleaning to ensure proper operation and prevent membrane damage.
• Storage: Oltremare membrane elements must be stored appropriately to ensure proper operation and prevent membrane damage.

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

Official datasheet (PDF)

PDF datasheet