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- STARK High-Efficiency 4040 Reverse Osmosis Membrane – Industrial LP4040 RO membrane for Water Purification Systems
The STARK LP4040 membrane utilizes a spiral-wound TFC design, optimized for industrial-grade desalination and filtration applications. The semi-permeable membrane layer is selectively permeable to water molecules, effectively removing dissolved salts, minerals, heavy metals, organic compounds, and microbial contaminants through a pressure-driven process.
Under standard operating conditions (150 psi, 25°C, 500 ppm NaCl solution), the LP4040 delivers a steady permeate flow rate of 2,500 GPD with superior rejection capability. Its low-pressure operational profile helps reduce energy consumption while maintaining water output efficiency, making it ideal for energy-conscious businesses and facilities operating in hot climates.
The membrane's pH tolerance range (3–10 operation, 2–11 cleaning) allows compatibility with various chemical cleaning protocols, ensuring easier fouling prevention and extended membrane lifespan. With typical replacement cycles of 18–24 months, STARK LP4040 membranes provide both performance consistency and long-term cost-effectiveness.
STARK’s LP4040 element is manufactured using high-grade polymeric components and sealed with advanced potting materials to resist chemical degradation and mechanical stress. It can be installed vertically or horizontally and is suitable for single-stage or multi-stage RO systems.
Whether you're managing a commercial bottling plant, laboratory water supply, boiler feed treatment, or a municipal RO project, STARK's LP4040 membrane is built to help you meet water quality standards with confidence.
| Model | LP4040 |
|---|---|
| Membrane Type | Thin-Film Composite (TFC) |
| Dimensions | 4″ × 40″ (101.6 mm × 1,016 mm) |
| Membrane Area | 85 ft² (7.9 m²) |
| Salt Rejection Rate | Up to 99.5% |
| Permeate Flow Rate | 2,500 GPD (9,463 L/day) |
| Operating Pressure | 150 psi (1.0 MPa) |
| Max Temperature | 45°C (113°F) |
| pH Range (Operation) | 3 – 10 |
| pH Range (Cleaning) | 2 – 11 (max 30 minutes) |
| Max Pressure Drop | 15 psi (1.0 bar) |
| Compatible Housing | Standard 4040 RO Pressure Vessels |
The STARK LP4040 membrane is engineered for a wide range of industries requiring high-purity water. It is especially suitable for:
STARK LP4040 membranes are universally compatible with all standard 4040-style RO housings. Whether you are upgrading or replacing a membrane, no structural modifications are required. Its lightweight, ergonomic design ensures simple handling and tool-free insertion into pressure vessels. The membrane fits securely with standard interconnectors, reducing setup time and ensuring tight sealing to prevent bypass or contamination.
The LP4040 is engineered for excellent salt rejection, typically achieving up to 99.5% under standard test conditions. This high performance is maintained even under varying feedwater conditions, helping reduce TDS levels and safeguard downstream processes. In addition, its fouling-resistant materials and chemical-cleaning compatibility contribute to longer cleaning intervals and lower operational costs over the membrane's lifetime—up to 24 months of stable performance.
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