Specialty — Caustic Resistant
SP-CR Series — Caustic Resistance Membranes
MWCO 200 & 1000 Da for caustic recovery at pH up to 14
Product description
SP-CR caustic-resistant specialty membranes are designed for high-pH industrial applications including caustic purification, color and organic removal, NaOH recovery, alkaline stream concentration, salt separation and spent caustic reuse.
Their superior caustic resistance ensures stable performance in harsh alkaline conditions, making them ideal for chemical, textile, refinery, pulp & paper and resource recovery industries requiring efficient separation and chemical recovery from caustic streams.
Specifications
| Membrane Model | Effective Area ft² (m²) | Flux gpd (m³/d) | Rejection Rate (%) | Test Solution (ppm) | Test Pressure (psi) |
|---|---|---|---|---|---|
| SP-CR2-400 | 400 (37) | 4700 (17.7) | 90 | 2,000 MgSO₄ | 145 |
| SP-CR2-350/HDG | 350 (33) | 3400 (13.6) | 90 | 2,000 MgSO₄ | 145 |
| SP-CR2-80/34 | 80 (7.5) | 1100 (4.1) | 90 | 2,000 MgSO₄ | 145 |
| SP-CR2-65/HDG | 65 (6) | 900 (3.4) | 90 | 2,000 MgSO₄ | 145 |
Rejection test conditions: pH 8.0, 15% recovery, 30 minutes operation. Flow rate may vary ±25%.
Performance figures are nominal values obtained under the standard test conditions stated with each table. Actual performance varies with feedwater chemistry, pretreatment, flux, recovery, temperature, pressure and operating practice. Individual element flow may vary from the nominal value. Specifications are subject to change without notice — request the current datasheet before specifying.
Operating & cleaning limits
- Maximum Operating Pressure 41 bar (600 psi)
- Maximum Operating Temperature 45°C (113°F)
- Maximum Element Pressure Drop 1.0 bar (15 psi)
- pH Range Continuous Operation 2–14
- pH Range Short-Term Cleaning 1–14
- Maximum Feed SDI (SDI₁₅) 5.0
- Free Chlorine Tolerance < 0.1 ppm
Need a datasheet or pilot support?
Share your feedwater analysis and target recovery — our engineers will recommend the right element and array configuration.