Pallas LP 4021 Membrane 4" x 21" Reverse Osmosis Membrane Element
Technical Resources
Technical Resources
Pallas LP 4021 Membrane 4" x 21" Reverse Osmosis Membrane...
Pallas LP 4021 4" x 21" Reverse Osmosis Membrane Element | 4021 Membrane
High Performance 4021 Membrane for Commercial Reverse Osmosis Systems
The Pallas LP 4021 4021 membrane is a premium low-pressure reverse osmosis membrane element designed for high-capacity commercial water treatment systems. Delivering excellent water production and outstanding salt rejection, this membrane provides reliable, energy-efficient performance for a wide range of purification applications.
With a standard 4" x 21" configuration, the Pallas LP 4021 membrane produces up to 950 GPD (3.6 m³/day) while maintaining an impressive 99.3% stable salt rejection, making it an ideal choice for businesses that require consistent, high-quality purified water.
Key Features
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High-performance 4021 membrane element
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Standard 4" x 21" membrane size
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Produces up to 950 GPD (3.6 m³/day)
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99.3% stable salt rejection
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Low-pressure operation reduces energy consumption
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Thin-film composite membrane technology
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Designed for commercial and industrial RO systems
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Compatible with standard 4" x 21" membrane housings
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Reliable long service life with consistent water quality
Ideal Applications
The Pallas LP 4021 membrane is suitable for:
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Commercial reverse osmosis systems
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Industrial water purification
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Food and beverage processing
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Pharmaceutical and laboratory water systems
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Hospitality and catering
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Bottled water production
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Process water treatment
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Car wash and rinse water systems
Benefits of the Pallas LP 4021 Membrane
The Pallas LP 4021 membrane delivers:
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High water production of up to 950 GPD
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Excellent removal of dissolved salts and impurities
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Low-pressure operation for lower energy costs
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Reliable long-term performance
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Easy installation into standard 4021 membrane housings
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High-quality purified water for demanding applications
Technical Specifications
| Specification | Value |
|---|---|
| Model | Pallas LP 4021 |
| Membrane Size | 4" x 21" |
| Daily Permeate Flow | 950 GPD (3.6 m³/day) |
| Stable Salt Rejection | 99.3% |
| Minimum Salt Rejection | 99% |
| Active Membrane Area | 3.6 m² (39 ft²) |
| Feed Spacer | 28 mil |
| Test Feed Water | 1500 ppm NaCl |
| Test Pressure | 150 psi |
| Test Temperature | 25°C |
| Test pH | 7–8 |
| Maximum Operating Pressure | 600 psi |
| Maximum Operating Temperature | 45°C |
| Feed Water Flow | 3.6 m³/hour |
| Maximum Pressure Drop | 15 psi |
| Feed Water SDI | Maximum 5 |
| Operating pH Range | 2–11 |
| Cleaning pH Range | 1–13 |
| Chlorine Tolerance | Less than 0.1 ppm |
Operating Notes
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Salt rejection should be measured after 24–48 hours of continuous operation.
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Individual membrane elements may have a permeate flow variation of ±15%.
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Feed water should have an SDI of 5 or below for optimum membrane performance and lifespan.
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Free chlorine and other oxidising agents must be removed before the membrane, as oxidation damage is not covered by the manufacturer's warranty.
Why Choose the Pallas LP 4021?
The Pallas LP 4021 4021 membrane is engineered to provide maximum performance with low operating costs. Its high permeate output, excellent salt rejection and compatibility with standard 4" × 21" reverse osmosis systems make it an ideal solution for commercial and industrial water treatment applications.
Whether you are replacing an existing membrane or upgrading your reverse osmosis system, the Pallas LP 4021 membrane delivers dependable, high-quality water purification you can trust.
Order your Pallas LP 4021 4" x 21" reverse osmosis membrane today for reliable performance, outstanding water quality and long service life.
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