Ultrafiltration membranes are pressure-driven membranes. They are mainly composed of polymers such as cellulose acetate, cellulose acetate esters, polyethylene, polysulfone, and polyamide. Typically, they consist of a very thin, dense outer layer and a porous support layer beneath it. The dense outer layer is the functional layer, responsible for filtering and retaining contaminants. Depending on the manufacturing process, the dense outer layer can be on the inner or outer surface of the fibers, or both.
Ultrafiltration membranes refer to microporous filtration membranes with uniform pore size, ranging from 0.001 to 0.02 micrometers. Currently, ultrafiltration membranes have reached the third generation, which is an improvement and innovation based on the first and second generations. This third generation is a zirconium-alumina membrane, resistant to temperatures up to 400ºC, with a membrane thickness of 0.1 μm, consisting of a porous gel attached to a porous support plate 100-1000 μm thick. Compared to traditional separation methods, ultrafiltration technology is safer, more efficient, and energy-saving.
| Product Model |
UOT-856 |
UOT-865 |
UOT-880 |
| Raw Material |
Polyvinylidene Fluoride (PVDF) |
| Effective Membrane Area (m²) |
56 |
65 |
80 |
| Average Pore Size (μm) |
0.03 |
| Membrane Fiber ID/OD (mm) |
0.7 / 1.3 |
| Connection Port Size |
DN50 |
| Connection Type (Nut) |
Compression Fitting |
| Air Inlet Specification |
PT 3/8" |
| Filtration Mode |
Outside-in Dead-end / Cross-flow |
| Component Weight (kg) |
≤83 |
≤90 |
≤100 |
| Parameter |
Value |
| Maximum Inlet Water Pressure (kPa) |
500 |
| Maximum Transmembrane Pressure (kPa) |
200 |
| Applicable Temperature Range (°C) |
1 - 40 |
| Chemical Cleaning pH Range |
1-13 |
| Dimensions (mm) |
| Model |
L1 |
L2 |
L3 |
| UOT-856 |
1860 |
1820 |
1725 |
| UOT-865 |
1985 |
1945 |
1850 |
| UOT-880 |
2360 |
2320 |
2225 |
1. Q: What are the interface dimensions and types of this component?
A: The standard configuration is a DN80 flange interface. DN65 or DN100 flange adapters can also be provided upon customer request.
2. Q: What are the directional requirements for membrane module installation?
A: It must be installed vertically, with an inclination angle not exceeding 2°, and the permeate end facing upwards to ensure complete venting.
3. Q: What is the recommended operating pressure range?
A: The recommended operating pressure is 0.1-0.3 MPa. The initial pressure differential should be less than 0.05 MPa. Cleaning is required when the operating pressure differential exceeds 0.15 MPa.
4. Q: What are the frequency and conditions for chemical cleaning?
A: Chemical cleaning should be performed when the transmembrane pressure differential increases by 30% or the permeate flow decreases by 15%. Under normal operating conditions, cleaning is recommended every 3-6 months.
5. Q: What cleaning agents can be used?
A: We recommend using 0.1-0.5% citric acid or oxalic acid to remove inorganic scale, and 0.1-0.5% NaOH plus 0.05% sodium hypochlorite to remove organic fouling.
6. Q: How do I determine if the membrane module needs replacement?
A: If, after multiple chemical cleanings, the permeate flow rate remains below 50% of the initial value, or the desalination rate significantly decreases, it is recommended to replace the membrane module.
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