Vontron 4040 Reverse Osmosis Membrane 2400GPD ULP21-4040

Membrane ECOSOFT 4" EXLP-4040

Ecosoft EXLP-4040 membrane elements are low-pressure membranes designed for commercial use. EXLP membranes are manufactured using technology that ensures stable and reliable system performance.

Technical Specifications

• Membrane type: Spiral-wound element with a polyamide thin-film composite material.
• Active area: 9.3 m².
• Operating pressure: 6.9 bar.
• Flow rate: 9.8 m³/day.
• Stabilized salt rejection: 98.0%.
• The permeate flow rate and salt (NaCl) rejection are based on the following test conditions: 500 mg/L NaCl, 25ºC, permeate recovery according to specified parameters.
• The permeate flow rate per element does not exceed ±20% of the nominal value.
• Minimum stabilized salt rejection: 97.5%.
• Product specifications may slightly change during product development.

Operating Parameters

• Maximum water temperature: 45°C.
• Maximum operating pressure: 41 bar.
• Maximum pressure drop per element: 1.0 bar.
• pH range for continuous operation: 3 to 10.
• pH range for short-term cleaning: 2 to 12.
• Maximum feed water turbidity index (SDI): 5.
• Free chlorine tolerance: < 0.1 mg/L.

Dimensions

• Max. feed water volume (m³/h): 3.6
• A: 101.6 mm
• B: 99.7 mm
• C: 19.1 mm
• D: 26.7 mm

Limitations of the operating conditions

• Membrane type: Polyamide thin-film composite material
• Max. feed water temperature¹: 45°C
• Max. operating pressure: 41 bar
• Max. pressure drop per element: 1.0 bar
• pH range for continuous operation¹: 3-10
• pH range for short-term operation (30 min)²: 2-12
• Max. feed water SDI: SDI 5
• Residual chlorine concentration in feed water³: <0.1 mg/L

¹ For continuous operation at pH above 10, the maximum temperature is 35°C.
² See flushing instructions in the specification sheet.
³ Under certain conditions, the presence of free chlorine and other oxidants may cause premature membrane degradation. Since oxidation damage is not covered under warranty, ECOSOFT recommends removing residual chlorine at the pre-treatment stage before it reaches the membranes.

Important Information

Proper startup of reverse osmosis (RO) systems helps prepare the membranes for functional operation and prevents damage caused by excessive water flow or hydraulic shock. Following the correct startup procedure also ensures that system performance remains within the designed parameters, achieving the desired efficiency and water quality. Before starting the system, membrane preparation, filter media filling, instrument calibration, and other system checks should be performed. For more details, refer to the "Startup Procedure" manual.

Operational Recommendations

To prevent potential membrane damage, avoid sudden changes in pressure or flow in membrane elements during startup, shutdown, or flushing. When starting the system, it is recommended to gradually transition from a static to an operational state as follows:

• Gradually increase the feed water pressure over 30–60 seconds.
• Reach the working flow rate gradually over 15–20 seconds.
• Discharge the permeate produced during the first hour of operation to the drain.

General Information

After the initial wetting, always keep membrane elements moist. If the operating conditions and recommendations outlined in this document are not followed, the warranty becomes void and is canceled. To prevent biofouling during extended downtime, it is recommended to immerse membranes in preservation solutions. The customer assumes full responsibility for any consequences resulting from the use of incompatible chemicals and lubricants with membranes.

• The maximum pressure drop across the entire housing length is 1 bar.
• Always avoid backpressure on the permeate side.