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Vontron Reverse Osmosis Membrane ULP21-2540

P1 794

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 ULP21‑2540 RO Membrane – Ultra‑Low Pressure 2.5″×40″

The Vontron ULP21‑2540 RO Membrane is part of the ULP (Ultra‑Low Pressure) series by Vontron. This RO membrane is built for low‑TDS and municipal water applications, delivering reliable filtration with reduced operating pressure. Specifically, the ULP21‑2540 offers ~750 GPD (~2.8 m³/day) nominal permeate flow and ~99% stable salt rejection in a compact 2.5″×40″ (2540) size. It’s ideal for applications where space is limited or where energy and pump cost reduction is required.

Key Features

  • Ultra‑low pressure operation — works at roughly 2/3 the pressure of standard low‑pressure membranes.
  • Capacity: ~750 GPD and ~99% salt rejection under test conditions.
  • Compact size: 2.5″ diameter × 40″ length fits smaller vessels and retrofit systems.
  • Designed for feedwater TDS < 2000 ppm (surface, underground, municipal).
  • Durable design: Max operating pressure ~600 psi (~4.14 MPa) and feed temperature max ~45 °C.
  • Technical Specifications
Parameter Value
Model ULP21‑2540
Active Membrane Area ~30 ft² (~2.8 m²)
Rated Permeate Flow ~750 GPD (~2.8 m³/day)
Stable Salt Rejection Rate ~99.0%
Maximum Operating Pressure ~600 psi (~4.14 MPa)
Maximum Feed Temperature ~45 °C
Maximum SDI ≤ 5
pH Range (Operation) 3 – 10
pH Range (Cleaning) 2 – 12
Max Free Chlorine in Feed < 0.1 ppm

Why Choose the Vontron ULP21‑2540 RO Membrane?

If you’re looking for a compact membrane that offers strong performance with lower system pressure and energy cost, the Vontron ULP21‑2540 fits the bill. Because the element is designed for municipal or low‑salinity sources, you avoid the expense of higher‑pressure systems and oversized equipment. Moreover, its standard 2.5″×40″ size makes it easy to integrate into smaller or retrofit RO vessels.

Installation & Maintenance Tips

  1. Ensure proper pre‑treatment: feed water should meet SDI ≤ 5 and free chlorine < 0.1 ppm.
  2. On first use, flush the new membrane: 15‑25 minutes at low pressure, then 60‑90 minutes at full pressure; discard the first hour of permeate. Vontron Türkiye
  3. Monitor permeate flow and salt rejection; a drop may indicate fouling or membrane damage.
  4. Clean according to manufacturer guidelines; always stay within pH and temperature limits.
  5. Store spare membranes wet or in preservative solution (for example, 1% sodium bisulfite) when not in use.
Weight 1,6 kg
Dimensions 104 × 10 × 11 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.

Please Note!

Puritech does not cater for courier costs involved in bringing back a faulty product or sending it back to the client.

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