Product Introduction / INTRODUCTION
LPFT-4040 is a low-pressure aromatic polyamide composite reverse osmosis membrane element developed by Huamo Environmental for desalination of surface water and groundwater. The product achieves a high desalination rate of up to 99.3% while maintaining high water productivity. It is mainly used for desalination treatment of brackish water, surface water, groundwater, and tap water with a salinity within 5000 mg/L. Its application fields include the preparation of pure water for electronics, electric power, municipal drinking water, chemical industry, pharmaceuticals, etc., and it can also be used for wastewater reuse and concentration projects. It features good desalination performance, high water productivity, and low operating pressure.
Performance Parameters / SPECIFICATIONS & PARAMETERS
Product Performance Parameters:
| Model | Effective Area ft² (m²) | Feed Spacer mil | Permeate Flow gpd (m³/d) | Stable Salt Rejection % |
|---|---|---|---|---|
| LPFT-4040 | 93 (8.7) | 31 | 2200 (8.3) | 99.3 |
Notes:
1. The above test values are based on the following test conditions: Test solution: 2000 ppm NaCl; Test pressure: 225 psi (1.55 MPa); Temperature: 25°C; pH: 7–8; Recovery rate: 15%.
2. Effective membrane area guaranteed range: ±3%; Permissible variation range for permeate flow of a single membrane element: ±15%.
Product Dimensions:
| Model | A inch (mm) | B inch (mm) | C inch (mm) | D inch (mm) |
|---|---|---|---|---|
| LPFT-4040 | 40 (1,016) | 1.04 (26.5) | 0.75 (19) | 3.99 (99) |
Operating Conditions / TEST CONDITION
Membrane Type: Polyamide composite membrane
Maximum Operating Temperature: 45°C
Maximum Operating Pressure: 600 psi (41 MPa)
Maximum Pressure Drop: 15 psi (1.0 bar)
pH Range: Continuous operation 3–13
Maximum Feed Flow: 3.6 m³/h
Maximum Feed SDI15: 5
Allowable Free Chlorine Content: < 0.1 ppm
Precautions
Before putting the membrane system into operation, in order to prevent damage to the membrane elements caused by excessive feed flow or hydraulic shock, please strictly follow the start-up procedure as per the operating instructions to ensure that the system water quality and flow rate meet the designed targets.
Before the initial start-up of the membrane system, the pretreatment system commissioning, membrane element loading, instrument calibration, and other system checks should be completed.
The feed pressure should be gradually increased within a time frame of 30 to 60 seconds.
During long-term system shutdown, to prevent microbial growth, it is recommended to immerse the membrane elements in a preservative solution. The standard preservation solution is 1–1.5% (by weight) sodium bisulfite (food grade).
During system operation, please be careful to avoid back pressure on the product water side.
After the first wetting, always keep the membrane elements wet. For new membranes, rinse for 1 hour before first use.
During operation, ensure that chemicals and lubricants do not adversely affect the membrane elements.
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