Product information
High flow reverse osmosis membrane element Ecosoft HF-8040-440 is designed for 8″ industrial reverse osmosis systems that require high permeate flow with efficient operation at extra-low pressure. It delivers permeate flow up to 53 m³/day and supports efficient system performance with reduced operating costs. The membrane is recommended for feed water with TDS up to 1500 mg/L*.
Ecosoft HF membranes are manufactured using technology that supports long-term and reliable system operation. This membrane is suited for industrial applications including steam and hot water boilers, drinking water production, beverages, livestock and poultry farms, aquaculture, greenhouses, conservatories, mist humidification systems, laundries, and the food industry.
* For Ecosoft RO systems operating at 75% recovery and feed water temperature of 12°C, feed water TDS of 1500 mg/L typically corresponds to permeate TDS of approximately 100 mg/L.
Technical information
* Permeate flow for a single element may vary by ±15% from the stated value.
** Permeate flow and salt rejection are based on standard test conditions: 500 mg/L NaCl, 25°C, pH 8 and 15% permeate yield.
Before start-up, make sure the membrane is properly prepared for operation. Check membrane pretreatment, membrane element installation, instrument calibration, and overall system condition.
Avoid major pressure surges and flow fluctuations inside the spiral-wound elements during start-up, shutdown, cleaning, and other service procedures, as they may damage the membrane.
During launch, it is recommended to gradually switch the system from standstill to operational mode by following these steps:
- Gradually increase feed water pressure during 30–60 seconds,
- Bring the system to operating flow gradually during 15–20 seconds,
- Permeate produced during the first 60 minutes of operation should be discharged.
Keep the membrane wet after initial wetting.
To prevent biofouling during extended shutdowns, store the membrane elements in a preservative solution. The pressure drop across the full length of the housing must not exceed 3.4 bar.
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FAQ
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What is the main advantage of the Ecosoft HF-8040-440 membrane?
The HF High Flow series is designed for extra-low pressure operation, providing high permeate flow and improved energy efficiency in 8-inch industrial reverse osmosis systems.
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What are the recommended applications for Ecosoft HF-8040-440 membranes?
Recommended applications include steam and hot water boilers, drinking water production, beverages, livestock and poultry farms, aquaculture, greenhouses, conservatories, mist humidification systems, laundries, and the food industry.
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What is the recommended feed water TDS for the HF-8040-440?
This membrane is recommended for feed water with TDS up to 1500 mg/L.
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What does 440 in the model name mean?
It refers to the membrane active area in square feet, which is approximately 40.9 m².
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What is the nominal permeate flow rate of a single HF-8040-440 element?
The nominal permeate flow rate of one HF-8040-440 element is 53.0 m³/day, or approximately 14,000 GPD, under standard test conditions.
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What is the stabilized salt rejection of the HF-8040-440?
The stabilized salt rejection of the HF-8040-440 is 98.0%.
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At what applied pressure is the HF-8040-440 tested?
Under standard test conditions, the HF-8040-440 is tested at an applied pressure of 6.9 bar, or approximately 100 psi.
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What is the maximum operating pressure for this membrane element?
The maximum allowable operating pressure for this membrane element is 41 bar, or approximately 600 psi.
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What is the maximum operating water temperature?
The maximum operating water temperature is 45°C, or 113°F.
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What is the maximum allowable silt density index (SDI) for the feed water?
The maximum allowable feed water silt density index (15 min) is SDI 5.
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How long should the first portion of permeate be discharged during start-up?
During initial start-up, the first portion of permeate should be discharged for at least 60 minutes.
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Can HR-8040 elements be replaced with HF-8040 without changing the pump?
Yes. Ecosoft reverse osmosis systems use pumps that can operate efficiently with different membrane types, so replacing HR-8040 elements with HF-8040 does not require a pump change.
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What should be used to lubricate O-rings during membrane installation?
Only glycerine should be used for lubrication. Other lubricants, especially petroleum-based ones, may permanently damage the membrane.
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What happens if the pH is outside the recommended operating range?
For continuous operation, the recommended pH range is 3–10. Operation outside this range may cause chemical degradation of the polyamide layer and reduce membrane performance over time.
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What is the main difference between Ecosoft HR and HF series membranes?
The main difference is the balance between salt rejection and permeate flow.
The High Rejection (HR) series is designed for higher salt rejection up to 99.3% at a slightly higher operating pressure of 10.3 bar, making it more suitable for applications with elevated nitrate and silicate levels. The High Flow (HF) series is designed for higher permeate flow up to 53 m³/day and energy-efficient operation at extra-low pressure of 6.9 bar, with a stabilized salt rejection of 98.0%.
The choice depends on whether the priority is higher rejection or higher flow with lower energy consumption. Therefore, for silica-rich or high-purity needs, the HR series is essential, whereas the HF series is the standard for general industrial water production.
