Datasheet summary
Duratherm STD series
Engineering summary from PDF text extraction for Duratherm STD series. Verify every value with the OEM datasheet.
Summary
Product Identification
The Duratherm STD Series comprises high-temperature pure water elements designed to leverage continuous high-temperature operation and hot water sanitization for industries aiming to maximize energy recovery and utilize hot purified water. These elements are suitable for separation systems purifying water at temperatures up to 70°C (158°F) in low crossflow environments without suspended solids.
The series includes 8-inch and 4-inch diameter elements. All elements feature Durasan* Cage outer wrap, Polysulfone ATD, and a central tube.
Key Features:
- Prevents bio-fouling development
- No disposal costs
- 100% wet testing Quality Assurance
- Durable construction
- Sanitization on the permeate side
Membrane Material: A-Series, thin-film membrane (TFM*), PES
Markets:
- Food / Beverage
- BioPharm
- Electronics
- Chemical
Performance Specifications
| Model | Average Permeate Flow gpd (m³/day) | Average NaCl Rejection | Active Area ft² (m²) | Part Number |
|---|---|---|---|---|
| Duratherm STD RO4040 | 2,300 (8.7) | 99.5% | 90 (8.4) | 1228197 |
| Duratherm STD RO8040 | 9,000 (34.1) | 99.5% | 374 (34.9) | 1228225 |
| Duratherm STD UF8040HR | - | 5,000 Da | 348 (32.5) | 1207315 |
Testing conditions for RO models: 2,000 ppm NaCl solution at 225 psig (1,550 kPa) operating pressure, 25°C (77°F), pH 7.5, and 15% recovery, before any hot water sanitization. Average salt rejection is measured after 24 hours of operation. Individual flow rate may vary +/-20%. Final permeate flow rate is subject to variations in heat treatments, often stabilizing at 25% below nominal flow rate for Duratherm STD RO after heat treatment.
Mechanical / Hydraulic
Element Dimensions and Weight
| Model | Dimensions (Length 'a', Interconnector 'b', Diameter 'c') inches (cm) | Boxed Weight lbs (kg) |
|---|---|---|
| STD 4040 models | a: 40.0 (101.6) b: 0.625 (1.59) c: 3.9 (9.9) | 9 (4.1) |
| STD 8040 Models | a: 40.0 (101.6) b: 1.125 (2.86) c: 7.9 (20.1) | 35 (16) |
Note: 'a' includes the interconnector. 'b' indicates internal diameter unless specified as OD (outside diameter).
Operating Limits
Temperature Limits (RO and UF Models)
| Model | Maximum Operating Temperature | Maximum Cleaning Temperature | Maximum Sanitization Temperature |
|---|---|---|---|
| Duratherm STD RO | 158°F (70°C) | 122°F (50°C) | 194°F (90°C) |
| Duratherm STD UF | 158°F (70°C) | 122°F (50°C) | 194°F (90°C) |
Do not exceed 20 GFD (34 LMH) flux in any circumstances.
Operating Parameters – Duratherm STD RO
| Parameter | 41–122°F (5–50°C) | 122–158°F (50–70°C) |
|---|---|---|
| Typical Operating Flux | 10-18 GFD (17-31 LMH) | 10-18 GFD (17-31 LMH) |
| Max. Operating Pressure | 600 psi (4,137 kPa) | 400 psi (2,758 kPa) |
| Recommended Crossflow | ||
| - STD 4040 Models | 20 GPM (4.5 m³/hr) | 20 GPM (4.5 m³/hr) |
| - STD 8040 Models | 65 GPM (14.8 m³/hr) | 65 GPM (14.8 m³/hr) |
| Max. Pressure Drop: | ||
| - Over an element | 15 psig (103 kPa) | 7.5 psig (51 kPa) |
| - Per Housing | 60 psig (414 kPa) | 30 psig (207 kPa) |
| pH range: | ||
| - Continuous operation | 4.0-11.0 | 4.0-11.0 |
| - Clean-In-Place (CIP) | 2 – 11.5 | Not Allowed |
| Chlorine Tolerance | 500 ppm-hours, dechlorination recommended | 500 ppm-hours, dechlorination recommended |
Operating Parameters – Duratherm STD UF
| Parameter | 41–122°F (5–50°C) | 122–158°F (50–70°C) |
|---|---|---|
| Typical Operating Flux | 10-25 GFD (17-40 LMH) | 10-25 GFD (17-40 LMH) |
| Max. Operating Pressure | 600 psi (4,137 kPa) | 80 psi (522 kPa) |
| Recommended Crossflow | ||
| - STD 4040 Models | 20 GPM (4.5 m³/hr) | 20 GPM (4.5 m³/hr) |
| - STD 8040 Models | 65 GPM (14.8 m³/hr) | 65 GPM (14.8 m³/hr) |
| Max. Pressure Drop: | ||
| - Over an element | 15 psig (103 kPa) | 7.5 psig (51 kPa) |
| - Per Housing | 60 psig (414 kPa) | 30 psig (207 kPa) |
| pH range: | ||
| - Continuous operation | 4.0-11.0 | 4.0-11.0 |
| - Clean-In-Place (CIP) | 2 – 11.5 | Not Allowed |
| Chlorine Tolerance | 5,000 ppm-hours, dechlorination recommended | 5,000 ppm-hours, dechlorination recommended |
Feed Water
Feedwater should meet:
- NTU < 1
- SDI₁₅ < 5
Hot Water Sanitization Recommendations
- Prior to first use, new elements should be flushed with clean water (RO permeate preferred) for at least an hour at a transmembrane pressure not exceeding 45 psi (3 bar). The system must operate for a minimum of 24 hours before hot water sanitization.
- If hot water sanitization is done before first use, flush at low transmembrane pressure (up to 45 psi (3 bar)) for a minimum of 24 hours before sanitization.
- Maintain transmembrane pressure during hot water sanitization as low as possible, not exceeding 45 psi (3 bar), while ensuring some permeate flow for effective sanitization on the permeate side.
- Monitor and adjust crossflow so that pressure drop is not more than 2 psi per element or 10 psi per housing.
- Sanitization Procedure:
- Elements that have been in operation should be cleaned using an approved Clean-In-Place (CIP) procedure to remove scales or foulants, then thoroughly flushed for at least an hour before sanitization.
- Increase system temperature from room temperature to the target sanitization temperature (up to 90°C/194°F) at a rate not higher than 5°C/9°F per minute. Maintain the target temperature for 30 to 60 minutes.
- Cool the system to room temperature at a rate not higher than 5°C/9°F per minute.
- Note: Solubility of some inorganics, like calcium carbonate and calcium sulfate (above 45°C), decreases with increasing temperature.
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions of the OEM PDF datasheet. For contractual data, always refer to 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.