| Model | Material | Area / pcs | Application Pressure | Grid Thickness | Desalination Rate% |
|---|---|---|---|---|---|
| SL Lithium NF 8040 HS 70 | FRP | 365ft2/34m2 | 600psi | 30mil | 97 |
Note:
1. Membrane desalination rate is based on following test conditions: 2000ppmMgSO4, 70psi(4.8bar), 77℉ (25℃), 15% recovery rate.
2. The water yield of a single element may vary within a range of ±25%.
3. The stable desalination rate is normally achieved within 36 - 72 hours of continuous operation, depending on feeding features and operating conditions.
4. Sales specifications for this product may change slightly in accordance with design optimisation.
5. Guaranteed active area ±5%.
| Model | size(in./ cm.*) ABC | Packing weight LBS/Kg |
|---|---|---|
| SL Lithium NF 8040 HS 70 | 40.0/101.6 1.125/2.86 7.9/20.1 | 35/16 |
Note:
Membrane element fit into pressure vessels with engineered internal diameter of 8 in (20.3cm). *1in=2.54cm
| Operation flux range | 8~34LMH |
| Maximum operating pressure1 | 600psi (41bar) |
| Maximum temperature tolerance2 | 122°F (50°C) |
| Maximum tolerable pH | Continuous operation2:3 – 9 CIP:2 – 11 |
| Maximum pressure drop | 15psi (1.0bar) |
| Maximum chlorine tolerance3 | ＜0.1 ppm |
| Influent water quality requirements | NTU < 1 SDI15 < 5 |
Note:
1. If the temperature is higher than 95°F (35°C), the maximum withstand pressure is 435psi (30bar).
2. The highest operating temperature is 95℉ (35℃) when pH value is higher than 9.
3. Under certain circumstances, free chlorine and other oxidising agents can cause premature failure of membranes, therefore, it is recommended to remove free chlorine before it contacts with membranes.
When the membrane system is ready to be commissioned, the membrane treatment system needs to be started up correctly to prevent damages to membrane elements caused by the overflow of feeding water and the hydraulic shock. The correct initiating sequence helps to ensure that the system’s operating parameters align with design requirements, so that the quality and quantity of produced water through the system reach designed objectives.
Before the membrane system is initiated for the first time, pretreatment system debugging, elements loading, instrumentation debugging and calibration and ancillary equipment system debugging and so on shall be completed.
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During start-up, shutdown, cleaning, etc., to prevent potential damaged to membranes, any sudden changes of pressures or of crossflow flow in membrane elements shall be avoided. During start-up, it is suggested to follow the undermentioned procedures to gradually transit the system from shutdown to operating:
Feeding pressure should be gradually escalated over a period of 30 ~ 90 seconds.
The set peak of crossflow velocity should be gradually achieved over a period of 30~ 60 seconds.
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Once the membrane element is moisturized, it should always be kept moist.
If users failed to strictly follow the set operating limitations, the warranty will be null.
If the system need to be shut down for an extended period of time, it is recommended to immerse the membrane elements in protective solution to prevent microorganisms.
The user shall be responsible for any damages to the membrane elements caused by using incompatible chemicals, lubricants, etc.
The maximum pressure drop a single pressure vessel can tolerate is 50psi (3.4bar).
Under all circumstances, backpressure must be avoided on the production side of the membrane system.
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0086-000-0088
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