ULP21-4021 Vontron RO Membrane
R2,072.07
The ULP21-4021 Vontron RO Membrane is a reliable solution for water treatment and purification. Check stock availability at Monster Mechanical.
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UPL21-4021 Vontron RO Membrane – Ultra-Low Pressure Reverse Osmosis Element
The UPL21-4021 Vontron RO Membrane is a high-performance reverse osmosis membrane designed for ultra-low pressure operation. This membrane is ideal for applications requiring efficient desalination of surface water, underground water, tap water, and municipal water sources with a salt concentration lower than 2000 ppm.
Key Features
- Ultra-Low Operating Pressure: Operates at approximately two-thirds the pressure of regular low-pressure composite membranes, reducing energy consumption and operational costs.
- High Salt Rejection: Achieves a stable salt rejection rate of up to 99%, ensuring high-quality purified water.
- Large Active Membrane Area: With an active membrane area of 36 ft² (3.3 m²), it provides a high permeate flow rate.
- Durable Construction: Built with high-quality materials to withstand the demands of continuous operation in various water treatment applications.
Technical Specifications
- Model: UPL21-4021
- Active Membrane Area: 36 ft² (3.3 m²)
- Permeate Flow: 950 GPD (3.6 m³/day)
- Stable Salt Rejection: 99%
- Minimum Salt Rejection: 98.5%
- Test Conditions: 150 psi (1.03 MPa), 1500 mg/L NaCl, 25°C (77°F), pH 7.5, 8% recovery rate
Applications
The UPL21-4021 membrane is suitable for various applications, including:
- Pure Water Production: Ideal for producing high-purity water for industrial processes.
- Boiler Water Replenishment: Provides high-quality water for boiler systems, reducing scaling and maintenance.
- Food and Beverage Processing: Ensures the production of clean water for food and beverage manufacturing.
- Pharmaceutical Production: Meets the stringent water quality requirements for pharmaceutical manufacturing processes.
Installation and Maintenance Tips
- Pre-Treatment: Ensure proper pre-treatment of feedwater to protect the membrane from fouling and scaling.
- Regular Cleaning: Implement a regular cleaning schedule using appropriate cleaning chemicals to maintain membrane performance.
- Monitoring: Regularly monitor system parameters such as pressure, flow rate, and water quality to ensure optimal operation.


Shipping and Delivery
Monster Mechanical delivers nationwide across South Africa. Orders are processed once payment is confirmed, and dispatch timing depends on product type, stock availability and whether your system is built to order.
Delivery Information
- In-stock components and smaller items are usually dispatched within 1–3 business days.
- Larger RO systems, custom assemblies and project orders may require additional build or handling time before dispatch.
- Delivery times vary by destination and courier service, with major centres typically faster than regional or outlying areas.
For bulky equipment, installation-related deliveries or urgent requirements, please contact our team before ordering so we can confirm lead times, freight options and the best delivery solution for your location.



