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ULP series of ultra-low pressure aromatic polyamide compound membrane element newly developed by Vontron Membrane Technology Co., Ltd. can work under ultra low pressure to reach as high permeate flow and rejection same as regular low-pressure membrane element, and is applicable to desalination of surface water and underground water.
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Delivery and return
Delivery and return
Next day delivery in store
Buy before 6pm to receive your order next day.FREE
Next day delivery
Orders before 6pm from Monday to Saturday (or before 1pm on Sunday) will be delivered Next working day (except Northern Ireland and Highlands). Orders placed after 6pm (after 1pm on Sunday) or for Northern Ireland and Highlands will be delivered in 2 working days.29 USD
Drop Point
In 2-3 working days. Pick up your parcel in one of the many diferent collection points available and during a wide range of hours.39 USD
Same day delivery in London:
Place your order before 13:00 to get it today!. If you order later on, you’ll receive it the next day and if you order on Sunday, you’ll receive it the next working day.59 USD
Shipping Information
Shipping Information
SHIPPING
Complimentary ground shipping within 1 to 7 business days In-store collection available within 1 to 7 business days Next-day and Express delivery options also available Purchases are delivered in an orange box tied with a Bolduc ribbon, with the exception of certain items See the delivery FAQs for details on shipping methods, costs and delivery timesComposition and care
Composition and care
Characteristics of wood :
- Hard, compact , fiberous and porous
- Good wood gives a rich, warm and beautiful surface.
Wood is used for the construction of:
- Floor, Furniture, Walls
- Incidental furnishing (lampshades, picture frames)
- Kitchen & restaurant ware
Description
Vontron ULP31‑4040 RO Membrane – Ultra‑Low Pressure 4″×40″
The Vontron ULP31‑4040 RO Membrane is an ultra-low-pressure reverse osmosis element that delivers high performance in a compact format. With this Vontron RO Membrane, you get around 1,900 GPD (~7.2 m³/day) under ideal conditions, along with ~99% rejection, making it a strong choice for surface water, municipal, and low‑TDS applications. It operates at considerably lower pressure than standard membranes — thereby reducing infrastructure and energy costs. The 4″ × 40″ “4040” size ensures compatibility with common vessels and easier integration into existing RO systems.
Key Features of the Vontron ULP31‑4040 RO Membrane
- Ultra‑low-pressure design: works at approximately two‑thirds the pressure of standard membranes.
- Highly stable rejection (~99.4%) with a minimum of ~99.0% under test conditions.
- Rated average permeate ~1,900 GPD under testing conditions.
- Suitable for feedwater TDS up to ~2,000 ppm NaCl (municipal, surface, or borehole).
- Compact 4″ diameter × 40″ length fits standard RO vessels.
- Robust operating limits: Max pressure ~600 psi (4.14 MPa), max feed temperature ~45 °C, feed SDI ≤ 5.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | ULP31‑4040 |
| Active Membrane Area | ≈ 90 ft² (≈8.4 m²) |
| Rated Permeate Flow | ~1,900 GPD (~7.2 m³/day) |
| Stable Rejection Rate | ≈ 99.4% |
| Minimum Rejection Rate | ≈ 99.0% |
| Maximum Operating Pressure | ~600 psi (~4.14 MPa) |
| Maximum Feed Temperature | 45 °C |
| Maximum Feed Flow | 16 gpm (~3.6 m³/h) |
| SDI (Silt Density Index) | ≤ 5 |
| Free Chlorine in Feed | < 0.1 ppm |
| pH Range (Continuous) | 3–10 |
| pH Range (Cleaning) | 2–12 |
| Physical Size | Length ~1016 mm, OD ~99.7 mm (3.9″) |
Why Choose the Vontron ULP31‑4040 RO Membrane?
Opting for the Vontron ULP31‑4040 RO Membrane means choosing a high‑efficiency membrane that delivers reliable water quality with reduced energy and infrastructure cost. It is ideal for customers requiring large throughput without high-pressure systems. Moreover, its compatibility with existing 4″×40″ housings makes retrofit simple, and its strong performance specs ensure long-term value in municipal or low‑TDS applications.
Installation & Maintenance Tips
- Ensure pre‑treatment: feedwater must meet SDI ≤ 5, free chlorine < 0.1 ppm, and temperature ≤ 45 °C.
- On first use, flush the new membrane: 15‑25 minutes at low pressure, followed by 60‑90 minutes at full pressure — discard the first hour of permeate.
- Monitor key indicators: gradually check permeate flow, conductivity, and differential pressure; any drop may signal fouling or scaling.
- Follow chemical cleaning protocols as specified by the manufacturer. Avoid excessive chlorine exposure and maintain pH within limits.
- For storage or standby, keep the membrane wet or in a protective solution (e.g., 1% sodium bisulfite) to prevent microbial growth.
Additional information
| Weight | 3.85 kg |
|---|---|
| Dimensions | 105 × 15 × 15 cm |
