Delivery
Across Türkiye · 1–3 business daysProducts in stock ship free anywhere in Türkiye and arrive within 1–3 business days. Items not in stock are supplied to order — the lead time is confirmed to you when the order is approved.
SW 2540 Seawater Membrane
₺41,022.11
VAT included · In stock · Free shipping
Installation is a service · plumbing is the customer’s responsibility
Free Shipping
Across Türkiye
Fast Delivery
Across Türkiye · 1–3 business days
Compatibility Support
Send us the size and we will tell you which part fits
Order by Phone
0850 304 95 25
- SKU
- WP-MB-010
- Category
- RO Membranes, Water Filters, Water Treatment Spare Parts
Seawater RO · 2.5″ × 40″
Drinkable Water from the Sea with the SW 2540 Seawater Membrane
The SW 2540 seawater membrane is a high-pressure reverse osmosis element that overcomes the high salinity of seawater and turns it into drinking and utility water. Under high pressure and without chemicals, it separates the salt, bacteria, viruses and contaminants out of the water.
- Size
- 2,5" × 40"
- Salt Rejection
- Above 99%
- Use
- Seawater Treatment
01Problem & Solution
Seawater Cannot Be Used As It Is
Problem
Extremely High Salinity
At around 35,000 ppm TDS, seawater is extremely saline. It cannot be drunk, it ruins plumbing and appliances, and standard fresh water membranes cannot overcome that osmotic pressure — they stop working in short order.
Solution
High-Pressure Seawater RO
Built to withstand high pressure, the SW 2540 seawater membrane overcomes the osmotic pressure of seawater. Separating out most of the salt, it produces low-salinity, drinkable permeate.
02Key Features
High Salt Rejection, a Compact Element
The SW 2540 seawater membrane is a compact element built for high performance and durability in demanding seawater conditions.
High Salt Rejection
With salt rejection above 99%, it produces low-conductivity permeate even at high salinity.
Thin-Film Composite Construction
A polyamide thin-film composite membrane gives steady, dependable treatment under high pressure.
Compact Size
At 2.5″ × 40″ it is ideal for the tight spaces of ships, yachts, containerised units and pilot plants.
High Pressure Rating
It withstands the high operating pressures needed to overcome seawater’s osmotic pressure.
Chemical-Free Treatment
It works on pressure and membrane technology alone; no chemicals need to be added for treatment.
Standard Vessel Fit
Designed for pressure vessels of nominal 2.5″ internal diameter, it integrates quickly.
03Technical Specifications
Membrane Specifications
| Feature | Value | What it does |
|---|---|---|
| Size | 2,5" × 40" | The physical size. If a spare does not match this, it will not go into the housing. |
| Membrane Type | Thin-Film Composite Polyamide | The structure of the membrane. Chlorine burns it, so a carbon filter in front is essential. |
| Salt Rejection | Above 99% | How much of the dissolved salt is rejected. A higher figure means purer water. |
| Typical Permeate | ~700 gpd (~2.6 m³/day) | |
| Working Pressure | Typically ~55 bar (800 psi) | |
| Free Chlorine Tolerance | < 0.1 ppm | |
| Weight | 2 kg | Product weight. For wall mounting, the supporting surface is chosen accordingly. |
| Dimensions | 13 × 13 × 50 cm | The outer dimensions of the unit. The cabinet or plant room has to be wider than this. |
04Applications
Where Is It Used?
Thanks to its compact size, the SW 2540 seawater membrane is used in small and mid-scale systems producing fresh water from the sea.
- Ship & Yacht Systems
- Offshore Platforms
- Island & Marina Facilities
- Containerised Units
- Resorts & Holiday Complexes
- Pilot RO Units
- Coastal Applications
- Mobile Treatment Systems
05How It Works
How Does the SW 2540 Seawater Membrane Work?
Through Pre-Treatment
To protect the membrane, the seawater first passes through cartridge or multimedia filters and a chlorine removal stage.
High Pressure Applied
The high-pressure pump drives the seawater onto the membrane surface above its osmotic pressure.
Separation at the Semi-Permeable Film
Only water molecules pass through the film; salts, bacteria, viruses and contaminants are held on the other side.
Permeate and Concentrate
The low-salinity water that passes through (the permeate) goes into use, and the salt-concentrated reject is discharged.
Turning It into Drinking Water
Where needed, the low-conductivity permeate is brought to drinking water quality by a remineralisation stage.
06Making the Right Choice
What Decides the Right Membrane
When choosing the SW 2540 seawater membrane, the system’s capacity and the feed water conditions must be assessed correctly.
Water Requirement & Capacity
The daily fresh water requirement determines how many membranes are needed and the size of the system.
Feed Water Salinity
The source water’s TDS and temperature affect the pressure required and the output achieved.
Vessel & Pump Compatibility
How the 2.5″ vessel and the high-pressure pump match the membrane should be planned before installation.
Pre-Treatment Design
For the sake of membrane life, the pre-treatment — filtration and chlorine removal included — should be designed around the raw water quality.
07Maintenance and Use
Notes That Extend Its Life
- The SW 2540 seawater membrane is sensitive to free chlorine; the chlorine in the feed water must be brought below 0.1 ppm and suitable pre-filtration provided (SDI ≤ 5).
- If flow falls, differential pressure rises or salt rejection is lost, a chemical clean (CIP) should be carried out to the manufacturer’s procedures.
- The pressure drop per element and the maximum working pressure limits must not be exceeded, and the operating parameters kept within the manufacturer’s figures.
- Once first wetted the membrane must always be kept moist, and for long storage the manufacturer’s preservative solution recommendations should be followed.
08Frequently Asked Questions
Common Questions
What does the SW 2540 seawater membrane do?
It is a high-pressure reverse osmosis element used in seawater treatment units. By separating the salinity, bacteria, viruses and contaminants out of the water, it turns seawater into drinking and utility water — and it does so without adding any chemicals.
How does it differ from a fresh water membrane?
Seawater’s very high salinity creates a high osmotic pressure. Seawater membranes are therefore designed to work at far higher pressures and to give higher salt rejection. Fresh water membranes made for mains or well water are not suitable for these conditions.
What size and capacity is it?
It is a compact 2.5″ × 40″ element. Under standard seawater test conditions the typical permeate flow is around 700 gpd (~2.6 m³/day); real output varies with the feed water and the operating conditions.
Is pre-treatment needed?
Yes. Because the membrane is sensitive to free chlorine and to fouling, suitable filtration and chlorine removal must be applied ahead of it. The right pre-treatment directly affects the membrane’s life and performance.
Which systems is it used in?
It is used in small and mid-scale seawater treatment applications: watermaking systems on ships and yachts, offshore platforms, island and marina facilities, compact containerised units and pilot RO systems.
Only logged in customers who have purchased this product may leave a review.
Questions & Answers
Questions asked about this product
Questions on compatibility, capacity and installation are answered by our technical team. The answers stay public — so the next person with the same question can see them too.
No questions have been published for this product yet. You can be the first to ask.
Installation and commissioning
Installation is a service · plumbing is the customer’s responsibilityThe system is delivered ready to install; it only needs to be connected to the inlet and outlet lines. If valve setup is required, we provide free support over a video call. Installation and commissioning fall under our service work and are subject to a service fee. Plumbing labour and any pipes, valves and fittings are not included in the price; these items are the customer’s responsibility.
Warranty
ConsumableThis product is classed as a consumable or spare part; because its life depends on use, it is not covered by warranty. Faulty or incorrectly shipped items are replaced — just get in touch with us.
Withdrawal and returns
Distance sales agreementThe right of withdrawal and the return terms are set out in detail in the distance sales agreement. Systems that have been installed and commissioned, and made-to-order products, are outside its scope.
Related products
In stock
In stock
In stock
In stock
Reviews
There are no reviews yet.