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Vontron Reverse Osmosis Membrane ULP31-4040

Name: Vontron Reverse Osmosis Membrane ULP31-4040
SKU: ULP31-4040
Availability: OutOfStock

P2 499,99

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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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.

Weight	3,85 kg
Dimensions	105 × 15 × 15 cm

Return And Refund Policy

INSTORE EXCHANGES AND REFUNDS

For your convenience, item(s) purchased online may be exchanged or refunded at any Puritech store within South Africa, provided all online return policy conditions are met. A refund will be provided to you by crediting your original method of payment. Please note that cash refunds will not be provided under any circumstances and courier charges cannot be refunded.
Item(s) purchased at any Of Our store within South Africa can only be returned at a Puritech store within South Africa.

Puritech Online Returns Policy

There may be times when you will need to return an item purchased from us. Our Returns Policy is designed to assist you with your return. The benefits given by our Returns Policy are in addition to other rights and remedies you may have as a consumer under the Consumer Protection Act (CPA), as well as any other applicable acts.

If you wish to return any item(s) you have purchased, you can either return the item(s) via courier to our online store or in-person to a Puritech store within South Africa (only) within 14 days from the date of purchase…

We encourage you to return your parcel via Fast Way, Courier Guy, FedEx, or ParcelIt traceable courier services as all returned parcels remain the responsibility of the purchaser until received by Puritech.

Store purchases cannot be returned or refunded online.

Returns Policy Conditions

At Puritech we want to ensure you love the items you purchase. If you have changed your mind on a purchase we will exchange your item or refund your original method of payment provided that:

You return the item within 14 days (inclusive) from the date of purchase.
You produce your original Puritech invoice (receipt) when you return the item
The item is in original saleable condition:
With all original tags still attached
In an unopened and unused state
A return form is completed and accompanies your item(s) being returned
In original packaging

If you are not able to comply with these requirements, Puritech reserves the right to refuse an exchange or refund on change of mind items. Puritech will not accept a bank statement as proof of purchase.

We regret that we are unable to accept the exchange or return of the following items for change of mind for hygiene reasons:

Open Filters
Open Membranes
Used Reverse Osmosis Systems

Online Exchanges and Refunds

Online Exchanges

If you would like to exchange an item(s) for an alternative item(s), please complete the online Return Request form that is located within My Account under ‘My Orders’ prior to sending the item(s) back.

Exchanges can only be exchanged for the same value of the purchase price of the item being returned.

Your item (s) that you wish to return needs to be sent back to our online returns address with the relevant return documents, duly completed, and a tax invoice (receipt).

If the alternative item is no longer available, provided all the Returns Policy Conditions are met, a refund will be provided to you crediting your original method of payment. All return courier costs will be for your own expense and this will be deducted from your refund amount.

Online Refunds

To obtain a refund please fill out the online Return Request (RMA) form that is located within My Account under ‘My Orders’ prior to sending the item(s) back.

A refund will be provided to you crediting your original method of payment, providing all the Returns Policy Conditions are met and our warehouse has received the original item that is being returned. Cash refunds will not be provided under any circumstances.

COMPLETING A RETURNS REQUEST FORM ONLINE

Log into your Puritech “My Account” and go to “My Orders”.
Click on the order that contains the item(s) that you wish to return or request an exchange for and click on the returns button.
After you have submitted your return request, one of our friendly staff members will get in contact with you to organize a collection.
Once you have sent your item(s) back to our warehouse, our warehouse will authorize the refund.

Before sending, please ensure all details on this form are correct. You will also need to write the returns number on the outside of the parcel. You will be notified by email of the status of your exchange or refund.