Description

The ULP21-4021 reverse osmosis membrane is an ultra-low pressure thin-film composite (TFC) membrane engineered to deliver high permeate flow and excellent salt rejection while operating at significantly lower pressures than conventional low-pressure membranes. This advanced membrane technology reduces energy consumption and lowers both installation and operating costs by allowing the use of smaller pumps, pipelines, and associated equipment.

Designed for desalinating low-salinity water sources containing up to 2,000 ppm NaCl, the ULP21-4021 membrane is ideal for treating surface water, groundwater, municipal water, and tap water. It is widely used in commercial and industrial reverse osmosis systems for pure water production, boiler feed water, food processing, and pharmaceutical manufacturing.

Features:

• Ultra-low pressure operation for maximum energy savings.
• High permeate flow with excellent desalination performance.
• Reduces operating and installation costs.
• High salt rejection for consistent water quality.
• Suitable for low-salinity water sources.
• Thin-film composite (TFC) membrane construction.
• Compatible with standard 4021 membrane housings.
• Long service life with proper pretreatment.
• Reliable performance for commercial and industrial RO systems.
• Excellent chemical cleaning resistance.

Specifications:

• Model: ULP21-4021.
• Membrane type: Ultra-low pressure thin-film composite (TFC).
• Active membrane area: 36 ft² (3.3 m²).
• Average permeate flow: 950 GPD (3.6 m³/day).
• Stable salt rejection: 99.0%.
• Minimum salt rejection: 99.3%.

Standard test conditions:

• Test pressure: 150 psi (1.03 MPa).
• Feed water temperature: 25°C.
• Test solution: 1,500 ppm NaCl.
• Feed water pH: 7.5.
• Single element recovery: 15%.

Operating limits:

• Maximum operating pressure: 600 psi (4.14 MPa).
• Maximum feed water flow: 75 GPM (17 m³/h).
• Maximum feed water temperature: 45°C.
• Maximum feed water SDI: 5.
• Maximum free chlorine: <0.1 ppm.
• Continuous operating pH range: 3 to 10.
• Chemical cleaning pH range: 2 to 12.
• Maximum pressure drop per membrane element: 15 psi (0.1 MPa).
• Maximum pressure drop per pressure vessel: 50 psi (0.34 MPa).

Applications:

• Surface water desalination.
• Groundwater treatment.
• Municipal water purification.
• Tap water purification.
• Commercial reverse osmosis systems.
• Industrial reverse osmosis systems.
• Pure water production.
• Boiler feed water.
• Food and beverage processing.
• Pharmaceutical water production.

Why choose the ULP21-4021 reverse osmosis membrane?

• Operates at ultra-low pressure, reducing energy consumption and operating costs.
• Produces up to 950 gallons (3.6 m³) of purified water per day.
• Delivers excellent salt rejection for high-quality purified water.
• Reduces capital costs by allowing the use of smaller pumps and associated equipment.
• Ideal for treating low-salinity water sources up to 2,000 ppm NaCl.
• Compatible with standard 4021 RO membrane housings.
• Long-lasting membrane with excellent chemical cleaning resistance.
• Suitable for commercial and industrial water treatment applications.
• Reliable performance with consistent water quality.
• Provides an economical solution for efficient reverse osmosis water purification.