MANN+HUMMEL · Selective rejection nanofiltration
Product Information
Dimensional notes: Element dimensions follow the manufacturer's drawing: A is length and B is diameter. Permeate tube dimension C is the outer diameter for male tubes and inner diameter for female tubes. No ±1 mm dimensional tolerance is stated in the supplied datasheet.
Spiral-wound nanofiltration for water purification, with selective rejection of divalent and polyvalent ions while allowing monovalent ions to pass.
Membrane & element specifications
| Parameter | Specification |
|---|---|
| Membrane chemistry | Thin-film composite polyamide |
| Construction | Spiral-wound membrane element |
| Outerwrap | Fiberglass |
| Permeate flow — m³/day (GPD) | 47.3 (12,500) |
| Membrane area — m² (ft²) | 37.2 (400) |
| Stabilized MgSO₄ rejection | > 97% |
| Stabilized NaCl rejection | 45 - 55% |
Performance test conditions: 2,000 ppm MgSO₄, 4.8 bar (70 psi), 25°C (77°F), 15% recovery, pH 8.0, 30 minutes operation. Flow rates will be no more than 15% below the values shown.
Operating parameters
| Parameter | Specification |
|---|---|
| Maximum operating pressure | 41 bar (600 psi) |
| Maximum operating temperature | 45°C (113°F) |
| Cleaning pH range | 1.0 - 12.0 |
| Chlorine tolerance | < 0.1 ppm |
| Maximum pressure drop | 1 bar (15 psi) per element; 4 bar (60 psi) per housing |
| Maximum SDI₁₅ | 5.0 |
| Maximum turbidity | 1 NTU |
Physical dimensions
| Parameter | Specification |
|---|---|
| Dimension A — mm (in) | 1,016 (40.0) |
| Dimension B — mm (in) | 201 (7.9) |
| Dimension C — mm (in) | 28.6 (1.125) |
| Permeate tube | Female |
| Element weight — kg (lb) | 17 (37) |
Important qualifications
- Flow rates will be no more than 15% below the values shown. Product specifications may change without notice as design revisions occur.
- All models have diamond-shaped feed spacers.
- Dimension C is the inner diameter for female elements and the outer diameter for male elements. Male elements have a protruding permeate tube; dimension D is 1.05 in (26.7 mm).
- Shipping weight depends on packaging material and quantity shipped.
- Refer to the temperature and pH limits in Membrane Cleaning Guide – Water Application Elements (TSG-C-001).
- Pretreatment is recommended to remove free chlorine and other oxidizing agents. Contact with polyamide membranes may shorten operating life or cause membrane failure. Oxidation damage is excluded from warranty; refer to Membrane Operating Guide – Recommendations for Water Purification (TSG-O-012).
- The family-level construction description specifies fiberglass outerwrap; the model-specific outerwrap table lists Tape for the 4040 model. This page follows the model-specific table for outerwrap and pressure rating.
Start-up, cleaning & storage
Before operation, flush elements for 30 minutes at low pressure and discard permeate during the flush. See Element Start-Up Guide – System Start-Up (TSG-O-005). Clean periodically to ensure proper operation and prevent membrane damage; see Membrane Cleaning Guide – Water Application Elements (TSG-C-001). Store appropriately; see Element Storage Guides (TSG-O-009 & TSG-O-010).
Manufacturer datasheet
microdyn-nf-nf7-data-sheet.pdf · 07/01/2021 · Pages 1–2. Specifications and units above follow the supplied manufacturer document.
The co-branded edition adds BioProcessH2O contact details while retaining the manufacturer's technical content.
Download BioProcessH2O datasheet
