Product Performance and Characteristics

Ultra-low pressure (U) series is an aromatic polyamide composite membrane element developed by OVAY Technology for desalting raw water with low salt concentration.
It can achieve higher water flux and desalination rate under lower operation pressure, and can be widely used in pure water preparation, reclaimed water reuse, food processing and other fields.

Membrane Element Specification and Performance

Membrane element model	Stable desalination rate (%)	Minimum desalination rate (%)	Average water yield gpd (m³/d)	Effective membrane area ft² (m²)
OV-U-4040-HR	99.7	99.4	2200 (8.3)	100 (9.3)
OV-U-8040-HF	99.2	98.8	12000 (45.4)	400 (37.2)
OV-U-8040	99.4	99.0	12000 (45.4)	400 (37.2)
OV-U-8040-HR	99.7	99.4	10500 (39.7)	400 (37.2)
OV-U-8040 440	99.7	99.4	12000 (45.4)	440 (40.9)

Test Conditions

• Test pressure ………………………………………….. 150 psi (1.03 MPa)
• Test solution temperature ……………………….. 25°C
• Test solution concentration (NaCl) ………….. 1500 ppm
• pH value of test solution …………………………. 7.5
• Recovery rate of single membrane element …. 15%

Limit Service Conditions

• Maximum operation pressure ………………….. 600 psi (4.14 MPa)
• Maximum inlet flow ………………………………. 75 gpm (17 m³/h) (8040)
  16 gpm (3.6 m³/h) (4040)
• Maximum inlet temperature ……………………. 45°C
• Maximum temperature of chemical cleaning .. 45°C
• Free chlorine concentration in inlet …………… < 0.1 ppm
• pH range of feed during continuous operation .. 2–10
• pH range of feed during chemical cleaning ……. 1–13
• Maximum pressure drop of single membrane element … 15 psi (0.1 MPa)

Dimensions of Membrane Elements

All units shown in the diagram are in millimeters (inches)

Note : The dimensions of membrane elements shown in the above figure are marked with tolerances.

Important Information

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Before use or storage, review these additional resources for important information:
Ovay Usage Guidelines
System Operation: Initial Start-Up
Contact an Ovay representative for reasonable technical support.

General Information

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Keep elements moist at all times after initial wetting
Membrane elements must be immersed in a preservative solution to inhibit biological growth
during a long-term outage. Rinse out the preservative before reuse.
Maximum pressure drop across an entire pressure vessel (housing) is 15 ps（i 0.1 Mpa）
Avoid static permeate-side back pressure at all times

The Limited Warranty will be null and void if operating limits and guidelines given in this Product Information Bulletin are not strictly followed and the customer is fully responsible for the effects of chemicals that are incompatible with the elements.

Notice
The use of this product in medical-related contexts does not necessarily guarantee removal of cysts and pathogens or thorough disinfection of oxygen and system. The performance depends on the complete system design, operation, maintenance, and regular replacement of the system.

Notice
Ovay accepts no responsibility for results obtained by the application of this information or the safety or suitability of Ovay’s products, either alone or in combination with other products. Users are advised to make their own tests to determine the safety and suitability of each product combination for their own purposes and ensure that Customer’s workplace and disposal practices are in compliance with applicable laws and other governmental enactments. All data may change without prior notice, due to technical modifications or production changes. Ovay assumes no obligation or liability for the information in this document.

NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED