Description

The LP21-4040 Reverse Osmosis Membrane is an ultra-low pressure aromatic polyamide composite membrane element specifically designed for the desalination of brackish water. It delivers high permeate flow and excellent salt rejection while operating at lower pressures, helping to reduce energy consumption without compromising water quality.

Engineered for commercial and industrial Reverse Osmosis (RO) systems, the LP21-4040 effectively removes dissolved salts, Total Organic Carbon (TOC), silica (SiO₂), and other dissolved contaminants. Its outstanding performance makes it ideal for producing high-purity water used in the electronics, pharmaceutical, food and beverage, and power generation industries.

Suitable for treating municipal water, groundwater, surface water, and other low-salinity water sources, the LP21-4040 membrane provides reliable operation, long service life, and consistent water quality.

Features:

• Ultra-low pressure operation for reduced energy consumption.
• High permeate flow for increased water production.
• Excellent salt rejection performance.
• Effectively removes dissolved salts, TOC, and silica (SiO₂).
• Designed for brackish water desalination.
• Suitable for commercial and industrial RO systems.
• Compatible with standard 4040 membrane housings.
• Long service life with proper pretreatment.
• High chemical resistance during membrane cleaning.
• Reliable and consistent performance.

Specifications:

• Model: LP21-4040.
• Membrane Type: Ultra-low pressure aromatic polyamide composite.
• Active Membrane Area: 100 ft² (9.3 m²).
• Average Permeate Flow: 2,800 GPD (10.6 m³/day).
• Stable Salt Rejection: 99.6%.
• Minimum Salt Rejection: 99.3%.

Standard Test Conditions:

• Test Pressure: 225 psi (1.55 MPa).
• Feed Water Temperature: 25°C.
• Test Solution: 2,000 ppm NaCl.
• Feed Water pH: 7.5.
• Single Element Recovery: 15%.

Operating Limits:

• Maximum Operating Pressure: 600 psi (4.14 MPa).
• Maximum Feed Water Temperature: 45°C.
• Maximum Feed Water Flow: 75 GPM (17 m³/h).
• Maximum Feed Water SDI15: 5.
• Continuous Operating pH Range: 2 to 11.
• Chemical Cleaning pH Range: 1 to 13.
• Maximum Feed Water Residual Chlorine: <0.1 ppm.
• Maximum Pressure Drop Per Membrane Element: 15 psi (0.1 MPa).
• Maximum Pressure Drop Per Pressure Vessel (6 Elements): 50 psi (0.34 MPa).

Applications:

• Brackish water desalination.
• Commercial Reverse Osmosis systems.
• Industrial water purification.
• Drinking water production.
• Packaged drinking water.
• Direct drinking water systems.
• Food and beverage processing.
• Pharmaceutical water production.
• Medical water systems.
• Electronics and power industry high-purity water production.

Why Choose the LP21-4040 Reverse Osmosis Membrane?

• Produces high-quality purified water with up to 99.6% salt rejection.
• Operates efficiently at low pressure, reducing operating costs.
• High permeate flow improves overall system productivity.
• Removes dissolved salts, TOC, silica, and other contaminants.
• Suitable for municipal, groundwater, and surface water applications.
• Compatible with standard 4040 membrane pressure vessels.
• Excellent chemical resistance for effective cleaning and extended membrane life.
• Ideal for commercial and industrial water treatment systems.
• Reliable long-term performance with proper pretreatment.
• Provides a cost-effective solution for high-purity water production.