Vontron ULP21-4021 Reverse Osmosis Membrane
Vontron ULP21-4021, 4 inch x 21 inch Low Pressure Reverse Osmosis Membrane
4”x21” Low Energy RO Membrane
950 gpd / 99% / 150 PSI
Typical operating pressure of 150PSI (1050kPa)
Vontron ULP21-4021 ultra low pressure membrane delivers high permeate flows and salt rejection at lower raw water pressures, compared to regular low-pressure membrane elements. The high salt rejection and low working pressure result in up to 30% lower energy consumption compared to standard elements.
Vontron ULP 4021 series of low pressure membrane element are based on a 10.3 bar (150 PSI) test pressure.
Product Specifications:
Salt Rejection: 99%*
Permeate Flow: 950 gpd (3.6 m³/day)*
Membrane Area: 36 ft².
Diameter / Length: 4 inch / 21 inch.
*Test conditions: 1500 mg/l NaCl, 10.3 bar (150 psi), 25 °C (77 °F), pH 7.5, recovery rate 8%.
*Pre-treatment must be used to protect the membrane (softener, antiscalant dosing pump, sand filter, carbon filter, 5 mic cartridge fitler ...etc).
Vontron ULP 4021 membrane is suitable for water purification applications of water sources with salt concentration lower than 2000 ppm, such as surface water, underground water, tap water and municipal water.
Commercial Application:
- Drinking water.
- Softened water for homes, hotels, commercial laundries and car wash.
- Spot free rinse, used for window cleaning and solar panel cleaning
- Pure water for pharmaceuticals, laboratories, Hemodialysis and electronics
- Sterilisers and autoclaves.
- Chemical industry.
- Aquarium water treatment.
- Boiler and cooling towers make-up water.
- Pure water, boiler water replenishment, foodstuff processing, and pharmaceutical production..
Compatible with reverse osmosis membrane types:*
Filmtec TW30-4021 / Filmtec XLE-4021 / GE Desal AG4021 / Hydranautics ESPA4-4021 / Toray CSM RE4021-BE.
*Check the data sheet for each membrane.
Operation Conditions:
Max. working pressure: 600 psi (4.14MPa)
Max. Feed water flow: 16 gpm (3.6 m3/h)
Max. Temperature of Feed water: 45℃
Max. Feed water SDI15: 5.
Max. Feed Water Total Hardness: 10 ppm (softener or antiscalant should be used).
pH Range of Feed water during Continuous Operation: 3～10
pH Range of Feed Water during Chemical Cleaning: 2～12
Residual chlorine Concentration of feed water ＜0.1ppm Max.
Pressure drop of single membrane element: 15psi (0.1MPa)
Free Shipping Australia wide, Fast Delivery to New Zealand.
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Estimated Delivery:Jul 23 - Jul 27
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Next Day Dispatch
Vontron ULP21-4021 Reverse Osmosis Membrane
Vontron ULP21-4021, 4 inch x 21 inch Low Pressure Reverse Osmosis Membrane
4”x21” Low Energy RO Membrane
950 gpd / 99% / 150 PSI
Typical operating pressure of 150PSI (1050kPa)
Vontron ULP21-4021 ultra low pressure membrane delivers high permeate flows and salt rejection at lower raw water pressures, compared to regular low-pressure membrane elements. The high salt rejection and low working pressure result in up to 30% lower energy consumption compared to standard elements.
Vontron ULP 4021 series of low pressure membrane element are based on a 10.3 bar (150 PSI) test pressure.
Product Specifications:
Salt Rejection: 99%*
Permeate Flow: 950 gpd (3.6 m³/day)*
Membrane Area: 36 ft².
Diameter / Length: 4 inch / 21 inch.
*Test conditions: 1500 mg/l NaCl, 10.3 bar (150 psi), 25 °C (77 °F), pH 7.5, recovery rate 8%.
*Pre-treatment must be used to protect the membrane (softener, antiscalant dosing pump, sand filter, carbon filter, 5 mic cartridge fitler ...etc).
Vontron ULP 4021 membrane is suitable for water purification applications of water sources with salt concentration lower than 2000 ppm, such as surface water, underground water, tap water and municipal water.
Commercial Application:
- Drinking water.
- Softened water for homes, hotels, commercial laundries and car wash.
- Spot free rinse, used for window cleaning and solar panel cleaning
- Pure water for pharmaceuticals, laboratories, Hemodialysis and electronics
- Sterilisers and autoclaves.
- Chemical industry.
- Aquarium water treatment.
- Boiler and cooling towers make-up water.
- Pure water, boiler water replenishment, foodstuff processing, and pharmaceutical production..
Compatible with reverse osmosis membrane types:*
Filmtec TW30-4021 / Filmtec XLE-4021 / GE Desal AG4021 / Hydranautics ESPA4-4021 / Toray CSM RE4021-BE.
*Check the data sheet for each membrane.
Operation Conditions:
Max. working pressure: 600 psi (4.14MPa)
Max. Feed water flow: 16 gpm (3.6 m3/h)
Max. Temperature of Feed water: 45℃
Max. Feed water SDI15: 5.
Max. Feed Water Total Hardness: 10 ppm (softener or antiscalant should be used).
pH Range of Feed water during Continuous Operation: 3～10
pH Range of Feed Water during Chemical Cleaning: 2～12
Residual chlorine Concentration of feed water ＜0.1ppm Max.
Pressure drop of single membrane element: 15psi (0.1MPa)
Free Shipping Australia wide, Fast Delivery to New Zealand.
Discover more in our FAQ
What types of industrial water treatment products do you offer?
We offer a comprehensive range of industrial water treatment solutions, including:
Filtration Systems – Effectively removes sediment, chlorine, and other impurities to enhance water purity and system longevity.
Reverse Osmosis Membranes – High-performance purification technology that eliminates dissolved solids, contaminants, and impurities for ultra-pure water.
Membrane Housings – Durable, high-pressure enclosures engineered to protect and optimize the performance of RO membranes.
Filter Cartridges – Precision-engineered sediment, carbon, and specialty filters designed to target specific contaminants for enhanced water treatment efficiency.
Chemical Dosing Systems – Precise chemical treatment for water.
Media FRP Pressure Vessels – High-pressure tanks for filtration media.
Ion Exchange Resins – Softening and demineralization solutions.
Water Instruments – pH meters, conductivity meters, and TDS testers.
Rotameter Flow Meters – Accurate flow measurement devices.
Watermaker Parts – Spare parts for marine and industrial watermakers.
Water Quality Test Kits – Portable and lab testing solutions.
How do I know which product is right for my application?
Choosing the right product depends on:
Water quality parameters (TDS, pH, hardness, contaminants)
Flow rate and pressure requirements
Industry-specific needs (food processing, pharmaceuticals, HVAC, etc.)
If you’re unsure, our technical support team can help you select the best solution.
Do you offer bulk pricing for large industrial orders?
Yes! We provide bulk discounts and custom pricing for high-volume orders. Contact us for a personalized quote.
How long does shipping take?
Shipping times depend on location and stock availability. Standard delivery is 3–7 business days for most regions. Expedited shipping options are available upon request.
What is your return policy?
We offer a 14-day return policy from the date of delivery. If you are not completely satisfied with your purchase, you can return the item for a refund or exchange, provided it meets our return conditions.
What happens if I receive a damaged or incorrect item?
If your item arrives damaged or you receive the wrong product, please contact us immediately at support@waterfilter.net.au with photos and your order number. We will send a replacement or issue a refund as per our return policy..
How long does shipping take?
Shipping times depend on location and stock availability. Standard delivery is 3–7 business days for most regions.
Expedited shipping options are available upon request.
Do you ship internationally?
Yes, we offer international shipping for most of our industrial water treatment products. Contact us for custom shipping quotes and lead times.