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RO Membrane TW – 8040 HF

P8 280

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Description
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RO Membrane TW-8040-HF – High-Flow Reverse Osmosis Element

The RO membrane TW-8040-HF from Puritech is a high-performance reverse osmosis element designed for large-capacity water purification systems. This membrane fits standard 8″ × 40″ housings that are common in industrial and commercial RO plants. It delivers high permeate output while maintaining excellent rejection of dissolved salts and total dissolved solids (TDS), making it suitable for demanding water purification tasks. Aqua Hydr8

Built using thin-film composite (TFC) technology, this membrane combines strong chemical resistance, durability, and proven performance. This makes it a solid choice where high output and consistent water quality are critical, such as in office water stations, large residential RO systems, commercial kitchens, or light industrial applications.

Performance & Advantages

The RO membrane TW-8040-HF offers:

High permeate flow: Delivers much higher water production compared with smaller 4040 or 2540 membranes, typically around 10 500 GPD (gallons per day) under standard test conditions.
Strong salt rejection: Maintains ~98 % stabilized salt rejection to produce water with significantly lower dissolved solids.
Efficient high-flow design: Suitable for systems where water demand is moderate to heavy, without sacrificing performance.
Broad compatibility: Works in most standard 8″ membrane housings, allowing for easier integration or upgrades.

These features make the TW-8040-HF an excellent membrane for RO systems in settings that require greater output and high-quality purified water in a compact, efficient form.

Technical Specifications

The table below summarises the typical test data and operational range for the RO membrane TW-8040-HF based on industry standards:

Specification	Details
Model	RO membrane TW-8040-HF
Membrane Size	8″ × 40″ (standard industrial format)
Nominal Permeate Flow	~10 500 GPD (~39.7 m³/day)
Stabilized Salt Rejection	~98 %
Test Pressure	~150 psi (≈10.3 bar)
Test Solution	750 ppm NaCl @ 25 °C (standard lab test)
Operating pH Range	Continuous: ~2–11, Cleaning (short term): ~1–13
Max Temp (Continuous)	~45 °C
Max Pressure	~600 psi (≈41 bar)
Max Feed SDI	≤ 5
Free Chlorine Tolerance	< 0.1 ppm (requires pre-carbon filtration)

*Actual performance will vary with feedwater TDS, temperature, pressure, recovery and system design. Standard testing conditions provide a baseline figure.

How It Works

Reverse osmosis membranes like this RO membrane TW-8040-HF use a semi-permeable thin-film composite (TFC) film that allows water molecules to pass while rejecting most dissolved salts and contaminants. Under pressure from a pump, feedwater flows across the membrane surface. Clean water (permeate) diffuses through the membrane, while concentrated brine (reject water with higher TDS) exits as waste. This separation process dramatically improves water quality.

For ideal performance, these membranes should be paired with proper pre-filtration stages (such as sediment and carbon filters) to protect the element from particulates and chlorine damage.

Recommended Applications

This RO membrane, TW-8040-HF, is well-suited for:

Commercial reverse osmosis systems requiring high daily water output
Large residential RO plants with increased water demand
Office and institutional water purifiers
Food service and catering systems
Pre-treatment for post-filters or polishing stages

Because of its high flow rate and robust rejection performance, it’s especially useful where water demand is high and quality matters.

Installation & Maintenance Tips

To maximise performance and membrane life:

Pre-treat water with appropriate sediment and carbon filters.
Flush new membranes before regular use to remove preservatives and stabilise performance.
Monitor pressure and TDS levels regularly to ensure the system operates within design limits.
Replace the membrane element if the permeate flow drops substantially or salt rejection declines.

Proper setup and maintenance help protect the membrane and ensure consistent water quality over time.

Conclusion

The RO membrane TW-4040-HF is a reliable, high-flow membrane element that balances output capacity with strong salt rejection for larger RO systems. Its standard 8040 size and high performance make it a great choice for commercial and demanding residential applications where water purity and production efficiency are priorities.

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.