Datasheet summary
PW series
Engineering summary from PDF text extraction for PW series. Verify every value with the OEM datasheet.
Summary
Product identification
The Dairy PW Series are polyethersulfone ultrafiltration membrane elements, characterized by a 20,000 molecular weight cut-off. They are typically used for protein concentrate up to 20% from milk and sweet whey (not suitable for acid whey). These elements feature a Durasan* Cage patented outer wrap and polysulfone parts.
Certifications
The Dairy PW elements comply with:
- FDA Regulations relevant sections of 21CFR
- EU Framework 1935/2004/EC
- Halal & Kosher certification
Element Specifications
| Model | Spacer mil (mm) | Active area ft² (m²) | Outer Wrap | Part Number |
|---|---|---|---|---|
| DAIRY PW3838C30 | 30 (0.76) | 69 (6.4) | Cage | 1228024 |
| DAIRY PW3838C50 | 50 (1.27) | 55 (5.1) | Cage | 1229303 |
| DAIRY PW6338C30 | 30 (0.76) | 217 (20.2) | Cage | 1207392 |
| DAIRY PW6338C50 | 50 (1.27) | 168 (15.6) | Cage | 1207393 |
| DAIRY PW6338C65 | 65 (1.65) | 129 (12.0) | Cage | 1223985 |
| DAIRY PW8038C30 | 30 (0.76) | 345 (32.0) | Cage | 1230789 |
| DAIRY PW8038C50 | 50 (1.27) | 263 (24.4) | Cage | 1230680 |
Mechanical / Hydraulic
Dimensions and Weight
| Model | Dimensions, inches (cm) | Boxed Weight lbs (kg) |
|---|---|---|
| A | B | |
| DAIRY PW3838 | 38.0 (96.5) | 0.833 (2.12) |
| DAIRY PW5838 | 38.0 (96.5) | 1.138 (2.89) |
| DAIRY PW6338 | 38.0 (96.5) | 1.138 (2.89) |
| DAIRY PW8038 | 38.0 (96.5) | 1.125 (2.86) |
Operating limits
- Typical Operating Pressure: 80-135 psig (555 – 931 kPa)
- Typical Operating Flux: 10-25 GFD (15-40 LMH)
- Clean Water Flux (CWF): 59 GFD (100 LMH) @ 30 psi and 50°C. CWF is the rate of water permeability through the membrane after cleaning (CIP) at reproducible temperature and pressure. It is important to monitor CWF after each cleaning cycle to determine if the system is being cleaned effectively. CWF can vary ± 25%.
- Maximum Operating Pressure: 200 psig (1,379 kPa)
- Maximum Temperature: Continuous operation: 122°F (50°C)
- Operating pH Range: 2.0-10.0
- Maximum Pressure Drop:
- Over an element: 12 psig (83 kPa)
- Per housing: 50 psig (345 kPa)
- Chlorine Tolerance: 5,000+ ppm-days
CIP and Disinfection Parameters
| Temperature | pH Minimum | pH Maximum |
|---|---|---|
| < 50°C (122°F) | 1.5 | 11.5 |
| < 45°C (113°F) | 1.5 | 11.5 |
| < 35°C (95°F) | 1 | 11.5 |
| < 25°C (77°F) | 1 | 12 |
- Recommended chlorine concentration and contact time at a maximum temperature of 50°C (120°F) is 180 ppm for 20 minutes MAXIMUM during chlorine caustic cycle.
- pH must be stabilized at 10.5 - 11.0 before chlorine addition.
- Membrane element surface must be free of catalyser presence such as iron or other metals. With oxidizers like chlorine or hydrogen peroxide, they accelerate membrane degradation.
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF. Contractual data must always match the specific OEM PDF revision used on the 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.