Choosing the right RO membrane series for your product line is the single most consequential technical decision in launching a water purification brand. Different applications — residential, seawater, industrial, semiconductor — demand fundamentally different membrane characteristics. Get this choice wrong, and your product will underperform; get it right, and you have a foundation that can scale across multiple SKUs and customer segments.
This guide walks through all five OVAY RO membrane series available for OEM/ODM partnership through Seven Pillars, with practical guidance on which series fits which product line.
OVAY Product Series Quick Reference
| Series | Best For | Key Characteristic | Typical OEM Application |
|---|---|---|---|
| OV-ULP | Residential & light commercial | Ultra-low pressure operation | Home RO systems, countertop units |
| OV-SW | Seawater desalination | High-pressure / high salt rejection | Marine, offshore, coastal facilities |
| OV-FR | High-fouling environments | Engineered antifouling surface | Industrial wastewater, brackish water |
| OV-L | Industrial high-flux | High flux at low pressure | AI data center cooling, semiconductor pre-treatment |
| OV-SG | Semiconductor / UPW | Ultrapure water production | Semiconductor fabs, pharmaceutical, lab water |
OV-ULP Series — Residential & Light Commercial
The OV-ULP (Ultra-Low Pressure) series is OVAY’s foundational product line and accounts for the majority of OEM volume shipped through Seven Pillars. If you’re building a residential water purifier brand, this is almost certainly your starting point.
Technical specifications:
| Parameter | Range |
|---|---|
| Membrane diameter | 1.8" / 2.0" / 3.0" / 3.2" |
| Active membrane area | Varies by model |
| Production capacity | 50 – 800 GPD |
| Salt rejection rate | ≥96% |
| Operating pressure | 40-100 PSI |
| Max operating temperature | 113°F (45°C) |
| pH range (continuous) | 3-10 |
| NSF certification | NSF/ANSI 58 & 61 |
Available models:
- OV-ULP 1812-50 — 50 GPD, compact form factor for small under-sink systems
- OV-ULP 1812-75 — 75 GPD, standard residential
- OV-ULP 2012-100 — 100 GPD, high-flow residential (most popular OEM SKU)
- OV-ULP 3012-300/400/600 — 300/400/600 GPD, light commercial and tankless systems
- OV-ULP 3013-400/600 — 400/600 GPD, premium residential
- OV-ULP 3213-800 — 800 GPD, top-tier residential and small commercial
Why brands choose OV-ULP:
- Operates at typical US household water pressure (40-80 PSI) without booster pump
- NSF/ANSI 58 certification accelerates compliance for finished system certification
- Wide range of GPD configurations supports diverse product positioning (entry-level to premium)
- Highest production volumes mean fastest lead times and competitive pricing
Target OEM customer: US residential RO brands, Amazon DTC water brands, regional plumbing distributors, retail chains (Costco, Home Depot private label, etc.)
OV-SW Series — Seawater Desalination
The OV-SW (Seawater) series handles the most demanding RO application: producing fresh water from seawater (TDS ≥ 32,000 ppm). These membranes operate at much higher pressures than residential RO and require specialized system design.
Technical specifications:
| Parameter | Range |
|---|---|
| Operating pressure | 800-1,200 PSI |
| Salt rejection rate | ≥99.5% |
| Feed water TDS | Up to 42,000 ppm |
| Boron rejection | High (critical for drinking water from seawater) |
| Recovery rate | 30-45% (typical) |
| Form factor | 8040 industrial standard |
Why brands choose OV-SW:
- Required for marine vessels, offshore platforms, coastal desalination plants
- Boron rejection meets WHO drinking water standards
- Compatible with standard industrial RO pressure vessels (8040 form factor)
- Available with chemical-resistant variants for harsh feed water
Target OEM customer: Marine RO system integrators, coastal water treatment companies, offshore platform service providers, island resort water systems.
OV-FR Series — Antifouling for High-Solids Applications
The OV-FR (Fouling-Resistant) series is engineered for applications where standard RO membranes would foul rapidly: industrial wastewater recycling, high-silica feed water, biologically active source water, and challenging brackish water.
Technical specifications:
| Parameter | Range |
|---|---|
| Operating pressure | 150-300 PSI |
| Salt rejection rate | ≥98% |
| Surface roughness | Engineered low-roughness (reduces biofilm adherence) |
| Service life | 50-100% longer than standard membranes in fouling conditions |
| Chemical resistance | Enhanced (broader pH tolerance) |
Why brands choose OV-FR:
- Significantly reduces membrane replacement frequency in challenging applications
- Lower total cost of ownership despite higher upfront price
- Required for industrial water reuse, ZLD (Zero Liquid Discharge) systems
- Differentiated positioning for industrial water treatment brands
Target OEM customer: Industrial water treatment brands, wastewater reuse system integrators, brewery and food/beverage water treatment, mining water applications.
OV-L Series — Industrial High-Flux Low-Pressure
The OV-L series combines high water permeability with low operating pressure — exactly the characteristics needed for energy-efficient industrial applications including AI data center cooling, semiconductor pre-treatment, and high-throughput commercial water systems.
Technical specifications:
| Parameter | Range |
|---|---|
| Operating pressure | 100-150 PSI (low for industrial) |
| Salt rejection rate | ≥99% |
| Flux | High (optimized for throughput) |
| Form factor | 8040 industrial standard |
| Fouling resistance | Engineered surface structure |
| Service life | 5+ years under proper pre-treatment |
Why brands choose OV-L:
- Energy efficiency critical in industrial applications (data centers report Water Usage Effectiveness metrics)
- High flux reduces required membrane area and capital cost
- Engineered fouling resistance extends service life
- Ideal for the rapidly growing AI infrastructure water treatment market
Target OEM customer: Industrial cooling water treatment brands, data center infrastructure suppliers, semiconductor fab water systems, commercial building water treatment.
OV-SG Series — Semiconductor / Ultrapure Water Grade
The OV-SG (Semiconductor Grade) series produces ultrapure water (UPW) meeting the demanding requirements of semiconductor manufacturing, pharmaceutical production, and laboratory water systems. These are the most technically sophisticated RO membranes in the OVAY catalog.
Technical specifications:
| Parameter | Range |
|---|---|
| Salt rejection rate | ≥99.7% |
| Output water resistivity | Compatible with 18.2 MΩ·cm UPW polishing |
| TOC rejection | Optimized |
| Endotoxin rejection | High |
| Operating pressure | 150-250 PSI |
| Form factor | 8040 industrial standard |
| Material certifications | NSF/ANSI 58 & 61 |
Why brands choose OV-SG:
- Required for semiconductor fab UPW pre-treatment
- Meets pharmaceutical water for injection (WFI) pre-treatment requirements
- Significantly cleaner output reduces downstream polishing costs
- The expanding US semiconductor manufacturing capacity (CHIPS Act facilities) creates strong demand growth
Target OEM customer: Semiconductor fab water system integrators, pharmaceutical manufacturing water systems, laboratory water purification brands, electronics manufacturing facilities.
How to Choose: A Decision Framework
For OEM customers evaluating which OVAY series fits their product line, here’s a decision framework:
Step 1: Identify your target market and application.
- Residential drinking water → OV-ULP
- Commercial RO systems → OV-ULP (higher GPD models) or OV-L
- Seawater applications → OV-SW
- Industrial process water with fouling concerns → OV-FR
- Industrial cooling/AI infrastructure → OV-L
- Semiconductor/pharmaceutical UPW → OV-SG
Step 2: Determine your performance requirements.
- Standard performance, residential price point → OV-ULP
- Premium performance, higher price tolerance → OV-L (residential markets) or OV-FR (industrial)
- Mission-critical / regulated industries → OV-SG
Step 3: Plan your product line expansion.
Many successful brands start with OV-ULP for their core residential SKU, then add OV-L or OV-FR for premium/commercial product tiers as they grow. This staged expansion shares operational infrastructure while diversifying your market exposure.
OEM Sampling and Specification
For OEM customers, we recommend the following sampling approach before committing to a full production order:
- Sample at least 3 units per series of interest for in-house testing
- Validate against your specific feed water — performance varies with source water conditions
- Test long-term performance — at minimum 30 days continuous operation to assess fouling profile
- Request manufacturer test data from OVAY for additional comparison
We provide complimentary samples for qualified OEM evaluation programs. Most customers complete their technical evaluation within 60 days from initial sample request to first production order commitment.
For brands focused on US market entry, every OVAY series carries NSF/ANSI 58 & 61 certification that streamlines your compliance pathway. If you’re planning a private-label launch, see our guide to private label RO membrane branding, MOQ, and lead times.
The Bottom Line
OVAY’s 5-series RO membrane portfolio gives OEM and private-label brands a comprehensive technical foundation for nearly any water purification application — from a $99 Amazon under-sink unit to a $50,000 industrial UPW skid serving a semiconductor fab. Through Seven Pillars’ authorized OEM partnership, your brand gains access to all five series with consolidated supplier management, unified compliance documentation, and a single point of technical support.
Ready to evaluate which OVAY series fits your product line? Request samples and technical consultation — we’ll work with your engineering team to recommend the right series, configuration, and OEM customization for your specific market opportunity.