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RO Membrane TW – 2540 HF

P1 518

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Description
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RO Membrane TW-2540-HF – High-Rejection RO Element

The Puritech RO membrane TW-2540-HF is a high-quality reverse osmosis element designed for brackish water and light industrial water purification systems. It offers excellent rejection of dissolved salts, organics, and TDS (total dissolved solids) while maintaining solid permeate output, making it ideal for RO systems where both water quality and efficient production are important.

This membrane fits standard 2.5″ × 40″ housings, so it integrates easily into most RO units without complicated modifications. As a result, it’s a reliable choice for homes, offices, and small commercial systems needing dependable, consistent filtration.

Performance & Benefits

The RO membrane TW-2540-HF delivers:

High salt rejection: Delivers purified water with low dissolved solids, improving taste and safety.
Strong permeate output: Around 800 GPD nominal capacity under typical testing conditions, which suits many medium-demand RO setups.
Broad pH and operating range: Works across typical feedwater pH and temperature conditions for flexibility and durability.
Durable design: Built to withstand typical RO feed pressures and cleaning cycles for extended membrane life.

This element is positioned between smaller low-output membranes and larger industrial units, offering a balance of flow rate, quality, and space usage.

Technical Specifications

Based on standard industry tests for TW-2540-HF membranes (under controlled lab conditions):

Specification	Details
Model	RO membrane TW-2540-HF
Membrane Size	2.5″ × 40″ (63.5 mm × 1016 mm)
Nominal Permeate Flow	~800 GPD (~3.0 m³/day)*
Minimum Salt Rejection	~96.5%
Stabilised Rejection	~97%
Test Conditions	25 °C, 25% recovery, 750 ppm NaCl feed
Max Temp (Continuous)	~45 °C
Max Pressure	~600 psi (≈41 bar)
Feedwater pH (Continuous)	2 – 11
Feedwater pH (Cleaning)	1 – 13
Max Feedwater SDI	≤ 5
Free Chlorine Tolerance	< 0.1 ppm
Applicable Systems	Brackish & light industrial RO

*Nominal permeate flow and rejection rates are based on standard test conditions; actual performance varies with feedwater quality, pressure, and temperature.

How It Works

A reverse osmosis membrane is a thin-film composite (TFC) element that separates water molecules from dissolved salts, impurities, and contaminants through a semi-permeable membrane. First, pressurised feedwater flows across the membrane surface. Then, clean water (permeate) diffuses through the membrane while salts and larger particles remain behind and are flushed away as concentrate (waste).

The TW-2540-HF model uses optimized membrane chemistry and internal spacers to balance high rejection with energy efficiency, making it well-suited for systems where both quality and throughput are required.

Recommended Applications

Use the RO membrane TW-2540-HF in systems such as:

Residential RO systems with medium water demand
Office or reception area water purification stations
Light commercial RO setups (e.g., cafés or small workshops)
Pre-treatment for additional post-filters (polishing cartridges)
Anywhere requiring high-quality potable water with low TDS

Because this membrane fits standard 2.5″ × 40″ housings, it’s easy to replace or install during system upgrades.

Installation & Maintenance Tips

To get the best performance from your RO membrane TW-2540-HF:

Always pre-filter feed water with sediment and carbon filters to protect the membrane and extend its life.
Flush new membranes before initial use to remove preservatives and stabilise performance.
Monitor feed pressure and TDS input to ensure optimal operating range.
Replace the membrane when permeate flow drops noticeably or salt rejection declines over time.

Following these simple steps ensures reliable performance and longer service life.

Conclusion

The Puritech RO membrane TW-2540-HF is a high-rejection membrane element that balances quality, consistency, and daily water production. Because it fits standard housings and operates well under typical RO conditions, it’s a solid choice for medium-demand water purification systems in homes, offices, and light commercial environments. With strong salt rejection and good throughput, this membrane helps deliver cleaner, safer water every day.

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.