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E-MEM XLP-4040 Industrial RO Membrane
XLP (Extra Low Pressure) series is an extremely low-pressure aromatic polyamide composite membrane element developed by Hangzhou E-MEM Environmental Technology Co., Ltd for surface water and groundwater desalination, which can achieve the same high-water flux and high desalination rate as the conventional low-pressure film under the condition of very low operating Pressure. Its operating pressure is about 1/2 of the operating pressure of conventional low-pressure composite membrane, so as to reduce the investment cost of related pumps, pipelines, containers, and other equipment and the operating cost of reverse osmosis system, and improve economic benefits.
XLP series membrane elements are suitable for the treatment of low-salt water sources with not high requirements for desalination rate, such as surface water, groundwater, tap water, and municipal water with salt content less than 1000ppm. Mainly used in various scales of pure water, boiler feed water, food processing, and other fields.
- Estimated Delivery : Up to 4 business days
E-MEM 4040 Industrial RO Membrane – High-Flux 4″×40″ Element
The E-MEM 4040 Industrial RO Membrane is a premium-grade aromatic polyamide composite element designed for large-scale water purification systems. It offers high water flux at lower operating pressures, making it both efficient and cost-effective.Typically used in industrial and commercial RO plants, this membrane supports applications such as boiler-feed water, bottled water production, surface and groundwater desalination, and more.
Key Features
- High Salt Rejection: Delivers rejection rates up to 99.5% under test conditions (2000 ppm NaCl) for model BW-4040/4040 series.
- Extra Low Pressure Operation: Reduced feed pressure requirements compared to standard membranes—leading to lower pump energy and infrastructure cost.
- Large Active Area: Approximately 8.4 m² (≈90.4 ft²) membrane area in the 4040 size, supporting high production volumes.
- Wide Application Range: Suitable for surface water, municipal feed, groundwater, brackish water (salt content <8000 ppm), and industrial water purification.
- Robust Operating Conditions: Max operating pressure ≈4.14 MPa (600 psi), max feed water temperature up to 45 °C, feed free chlorine concentration <0.1 ppm.
Technical Specifications
- Model: 4040 size (4″ diameter × 40″ length)
- Active Membrane Area: approx. 90.4 ft² (8.4 m²)
- Typical Permeate Flow: ~2400 GPD (≈9.1 m³/day) under 2000 ppm NaCl test condition for BW-4040.
- Max Operating Pressure: 4.14 MPa (600 psi)
- Max Feed Temperature: 45 °C
- Maximum Feed SDI (Silt Density Index): ≤ 5
- Free Chlorine Concentration: <0.1 ppm recommended
- pH Range (Continuous Use): 3-10; (Cleaning): 2-12
Why Choose the E-MEM 4040 Industrial RO Membrane?
If you manage a commercial or industrial water-treatment system, the E-MEM 4040 offers a standout balance of performance, efficiency, and cost-effectiveness. Because it operates at lower pressures while maintaining high flux and salt rejection, you incur lower pump energy and infrastructure costs. Moreover, its compatibility with a wide range of feed-water types—from municipal to low-salinity brackish—makes it flexible for many system designs. In addition, the large active area ensures robust production capacity, and you’ll benefit from reduced downtime and consistent water quality.
Installation & Maintenance Tips
- Pre-treatment is key: Ensure feed water SDI ≤ 5 and free-chlorine <0.1 ppm.
- Start-up Flush: When new, flush the membrane at lower pressure for 15-25 minutes, then at full design pressure for 60-90 minutes—discharge the initial permeate/concentrate.
- Monitor differential pressure and permeate conductance: Increases in either may indicate fouling or scaling.
- Cleaning schedule: Clean based on manufacturer guidelines; use approved chemicals and check pH limits (2-12 for chemical cleaning).
- Storage of spare elements: Keep wet, or soak in 1.0% sodium bisulfite solution if prolonged storage is required.
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.
Wall Mounted Drinking Fountain 
