Ovay Reverse Osmosis Membrane Model Catalogue and Selection

Ovay is the RO membrane brand of Hunan Ovay Technology Co., Ltd., headquartered in Tianyuan District, Zhuzhou, Hunan Province. The company focuses on the development and manufacture of aromatic polyamide composite membranes, with products ranging from household membranes and industrial brackish water membranes to seawater desalination and fouling resistant membranes. It operates a complete process chain from membrane sheet casting to spiral-wound element assembly, which is the basis for its product line extending into both ultra-low pressure and fouling resistant directions.

According to public information, the company was founded in 2014 and is a national high-tech enterprise and a national-level specialised and sophisticated "little giant" enterprise. It is certified to ISO 9001, ISO 14001 and ISO 45001, and some membrane products hold US WQA, NSF/ANSI 58 and NSF/ANSI 61 certification. For potable-water and export projects these third-party certificates indicate batch consistency more clearly than a parameter table; public disclosures also state that the company's application for listing on the Beijing Stock Exchange has been accepted. Company information above is as published on the corporate website and in public disclosures.

The model system has two main lines: the OV series is organised by application (OV-U ultra-low pressure, OV-X very low pressure, OV-L low pressure, OV-FR fouling resistant, OV-SW seawater), while the OP5 series by rejection grade (OP5-10/OP5-20/OP5-30, where a higher number means higher rejection); HC/HP designates large-diameter and special-purpose models.

The number after OP5 is a common source of confusion in element selection: it denotes a performance grade rather than membrane area, and area is still read from the 400/440 in the model designation. Suffixes also carry meaning: -LE low energy, -HR high rejection, -MAX large-area version, -FR fouling resistant, -ECO economy version.

Series breakdown

Representative models and parameters

The table below lists representative models of this brand in 8040 format from the library (membrane area 365–510 ft² per element), sorted by area from largest to smallest; this format has 32 elements in total. The full model list can be filtered by brand in the design tool.

How to select

• General industrial pure water: OV-L-8040 400 (99.7%), with balanced parameters and wide interchangeability, the most general choice in this line.
• Energy-sensitive or low-salinity sites: OV-U-8040-440 (99.6%, 440 ft²) or the OV-X very low pressure series, suited to tap water and low-TDS groundwater; the -HR version gives higher rejection at the same pressure.
• Seawater and high-salinity wastewater: OV-SW-8040-XHR (99.85%) where permeate quality comes first, the LE/XLE versions where energy consumption comes first, with recovery designed at 40%~45%.
• Surface water and reuse water: the OV-FR series, combined with lower average flux and a 34 mil feed spacer, which lengthens the interval between cleanings.
• Grading by permeate specification: for OP5-10/20/30 a higher number means higher rejection; choose the grade against the permeate TDS requirement and do not mistake the number for membrane area.

Replacement and verification

The most common mistake in domestic substitution is treating a "corresponding model" as a direct equivalent. OV-U is positioned close to imported ultra-low pressure membranes, but membrane area (400/440), stabilised salt rejection and pressure-drop coefficients differ element by element. After replacement the software must re-solve the array and pressures, with particular attention to whether final-stage concentrate flow and per-element pressure drop exceed their limits.

At acceptance, batch sampling of actual permeate flow and rejection is advisable; large-area elements (440 ft²) are more sensitive to feed temperature and flux distribution, so sample data reflect consistency better than datasheet nominal values.

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