Datasheet summary
Compact Low 4
Engineering summary from PDF text extraction for Compact Low 4. Verify every value with the OEM datasheet.
Summary
Product identification
The Oltremare Compact LOW4 is a low energy, high productivity brackish water reverse osmosis (RO) membrane element. It features the same performance as the original LOW® (Energy Saving) element with a "plug and play" design.
Available models include:
- Oltremare Compact LOW4 – 2514
- Oltremare Compact LOW4 – 2521
- Oltremare Compact LOW4 – 2540
- Oltremare Compact LOW4 – 4014
- Oltremare Compact LOW4 – 4021
- Oltremare Compact LOW4 – 4040
Membrane Characteristics
- Membrane: RO
- Membrane Type: Polyamide
- Stabilized Salt Rejection: 99–99.2%
- 99.0% for modules 2514 to 4021
- 99.2% for module 4040
- Minimum Salt Rejection: 98–99.0%
- 98.0% for modules 2514 to 4021
- 99.0% for module 4040
Design Information
Test conditions for permeate flow: 1500 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.
| Element | Permeate Flow m³/day (gpd) | Maximum Feed Flow m³/h (gpm) | Membrane Area m² (ft²) | Feed Spacer Thickness (mil) |
|---|---|---|---|---|
| Oltremare Compact LOW4 – 2514 | 0.57 (150) | 1.38 (6) | 0.6 (6) | 28 |
| Oltremare Compact LOW4 – 2521 | 1.3 (350) | 1.38 (6) | 1.1 (12) | 28 |
| Oltremare Compact LOW4 – 2540 | 3 (800) | 1.38 (6) | 2.6 (28) | 28 |
| Oltremare Compact LOW4 – 4014 | 1.89 (500) | 2.72 (12) | 1.8 (19) | 28 |
| Oltremare Compact LOW4 – 4021 | 3.88 (1025) | 2.72 (12) | 3.2 (35) | 28 |
| Oltremare Compact LOW4 – 4040 | 9.8 (2600) | 3.6 (16) | 7.9 (85) | 28 |
Operating Limits
- Maximum Operating Pressure: 12.4 bar (180 psi)
- Maximum Operating Temperature: 45 °C (113 °F)
- Cleaning pH Range: 1.0–12.0 (Refer to the Membrane Cleaning Guide for temperature and pH limits)
- Chlorine Tolerance: < 0.1 ppm (Pretreatment is recommended for free chlorine removal to prevent damage and avoid warranty exclusion)
- Maximum Pressure Drop:
- 0.7 bar (10 psi) per element
- 4 bar (60 psi) per housing
- Maximum SDI₁₅: 5.0
- Maximum Turbidity: 1 NTU
Physical Dimensions
Element sizes must be considered within a range of ±3%, except for lengths (A and B) which are ±3‰. Modules are sealed with small screws (to be removed when used).
| Element | Weight lb (kg) | Dim. A mm (inches) | Dim. B mm (inches) | Dim. C mm (inches) | Dim. D mm (inches) | Dim. E mm (inches) |
|---|---|---|---|---|---|---|
| Oltremare Compact LOW4 – 2514 | 4.7 (2.1) | 417 (16.4) | 337 (13.25) | 80.5 (3.17) | 65 (2.56) | 130 (5.1) |
| Oltremare Compact LOW4 – 2521 | 6.6 (3) | 604 (22.8) | 534 (21) | 80.5 (3.1) | 65 (2.56) | 152 (6.0) |
| Oltremare Compact LOW4 – 2540 | 13.2 (3) | 1080 (42.5) | 1010 (39.8) | 80.5 (3.17) | 65 (2.56) | 130 (5.1) |
| Oltremare Compact LOW4 – 4014 | 11 (5) | 442 (17.40) | 361 (14.21) | 118 (4.65) | 104 (4.1) | 152 (6) |
| Oltremare Compact LOW4 – 4021 | 14 (6.4) | 624 (24.57) | 543 (21.38) | 118 (4.65) | 104 (4.1) | 165 (6.5) |
| Oltremare Compact LOW4 – 4040 | 25 (11.3) | 1110 (43.7) | 1029 (40.51) | 118 (4.65) | 104 (4.1) | 180 (7.1) |
Important Information
- Start-up: It is recommended to flush elements for 30 minutes at low pressure and discard permeate before operation. Refer to the Element Start-Up Guide – System Start-Up (TSG-O-005) for more information.
- Cleaning: Oltremare membrane elements require periodic cleaning for proper operation and to prevent damage. Refer to the Membrane Cleaning Guide – Water Application Elements (TSG-C-001).
- Storage: Oltremare membrane elements must be stored appropriately to ensure proper operation and prevent damage. Refer to the Element Storage Guides (TSG-O-009 & TSG-O-01).
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. For contractual data, always refer to the specific OEM PDF revision used on your project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.