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FilmTec 4" Membrane (4040)
₺48,261.30
VAT included · In stock · Free shipping
Installation is a service · plumbing is the customer’s responsibility
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Across Türkiye
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Across Türkiye · 1–3 business days
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0850 304 95 25
- SKU
- WP-MB-014
- Category
- RO Membranes, Water Filters, Water Treatment Spare Parts
4040 Size · Mains & Brackish Water
Steady Salt Rejection with the FilmTec 4″ Membrane
The FilmTec 4″ Membrane is a 4040 reverse osmosis element used to treat mains and brackish water. Its thin-film composite (TFC) structure separates out dissolved salts, heavy metals and organic contaminants at a high rate, giving steady flow and long life in mid-scale systems.
- Size
- 4" × 40" (4040)
- Construction
- TFC Polyamide
- Application
- Mains / Brackish Water
01Problem & Solution
Membrane Quality Decides the System’s Fate
Problem
Poor Performance, High Running Costs
With a weak membrane, salt rejection falls away over time, output drops and the system is forced to run at higher pressure. That raises the energy bill and makes the outlet water quality fluctuate.
Solution
Proven TFC Technology
The thin-film composite structure of the FilmTec 4″ Membrane delivers high salt rejection and steady permeate flow at low to medium pressure. The system runs at its design figures and running costs stay predictable.
02Key Features
Efficient, Durable, Standard-Compatible
The FilmTec 4″ Membrane is a dependable treatment element for mid-scale reverse osmosis systems.
High Salt Rejection
In mains and brackish water applications it separates out up to 99% of dissolved salts.
TFC Polyamide Construction
The thin-film composite layer combines high permeability with selective separation.
Standard 4040 Size
Compatible with common 4 inch pressure vessels, so it can be fitted into existing systems.
Low-Energy Options
The low-pressure models in the series support reaching a similar output target on less energy.
Cleanable by CIP
Suitable chemical cleaning procedures allow performance to be recovered.
Modular Installation
Connected in series in multi-element vessels, system capacity can be raised step by step.
03Technical Specifications
Product Details
| Feature | Value | What it does |
|---|---|---|
| Product Type | Reverse Osmosis Membrane Element | Which family the unit belongs to. Products in the same family can be used in place of one another. |
| Brand | FilmTec (DuPont) | The manufacturer. The valve and membrane brand decides how easily spares can be found. |
| Size | 4" × 40" (4040) | The physical size. If a spare does not match this, it will not go into the housing. |
| Membrane Construction | Spiral-Wound TFC Polyamide | How the unit is put together. A compact cabinet takes little room; an open system makes servicing easier. |
| Feed Water | Mains / Brackish Water | The inlet water quality the unit can cope with. Above this limit, pre-treatment is needed. |
| Use | Commercial / Light Industrial | What setting it was designed for. A domestic unit will not carry a commercial load. |
04Applications
Where Is It Used?
The FilmTec 4″ Membrane is widely chosen for mid-scale reverse osmosis installations.
- Commercial RO Systems
- Hotels & Facilities
- Pre-Stage for a Pure Water Unit
- Food & Beverage Processes
- Boiler Feed Water
- Greenhouse & Irrigation Systems
- Membrane Replacement
- System Integrators
05How It Works
How Does the FilmTec 4″ Membrane Work?
Pre-Treatment Runs First
Sediment, carbon and, where needed, softening stages remove particles and chlorine to protect the membrane.
Pressure Is Applied
The high-pressure pump drives the water onto the membrane surface at a pressure above the osmotic pressure.
Selective Separation
The TFC layer lets water molecules through while dissolved salts, heavy metals and organics stay behind it.
Two Streams Separate
The treated water is taken off through the permeate line and the concentrated reject discharged through a separate line.
Performance Is Monitored
Differential pressure, conductivity and flow are tracked so the membrane’s efficiency is continuously assessed.
06Making the Right Choice
4″ or 8″?
When choosing the FilmTec 4″ Membrane, capacity, feed water and the existing vessel arrangement should be assessed.
System Capacity
A 4″ element suits mid-scale output; high-flow plants call for 8″.
Feed Water Type
This series is used on mains and brackish water; seawater requires the high-pressure series.
The Existing Pressure Vessel
The vessel’s diameter, element count and pressure rating must suit the membrane chosen.
Energy & Recovery
Low-pressure models cut the energy bill, and the target recovery rate shapes the design.
07Maintenance and Use
Notes That Extend Its Life
With the right pre-treatment and regular monitoring, the FilmTec 4″ Membrane works efficiently for a long time.
- Chlorine must be removed in pre-treatment; polyamide membranes are sensitive to it.
- In hard water, scaling should be prevented by softening or antiscalant dosing.
- When differential pressure or conductivity rises, a CIP chemical clean should be carried out.
- Once used, the element must not be allowed to dry out; membranes taken out of service should be stored wet.
08Frequently Asked Questions
Common Questions
What does the FilmTec 4″ Membrane do?
It is the main treating element in a reverse osmosis system. By separating out dissolved salts, heavy metals and organic contaminants from mains and brackish water at a high rate, it produces quality process or drinking water.
Is the brand Filmtec or Filmtech?
The correct spelling is FilmTec; today the brand is made under DuPont as FilmTec™. Filmtech is a common misspelling and refers to the same product.
What does 4040 mean?
It refers to the element’s size: roughly 4 inches in diameter and 40 inches long. 8040 means 8 inches by 40 inches; the two go into different pressure vessels.
Can it be used on seawater?
This series is for mains and brackish water. Seawater involves far higher pressure and salinity, so those applications call for the seawater membrane series.
When should it be replaced?
If, under constant operating conditions, permeate flow drops markedly, conductivity rises or differential pressure climbs, the membrane should be checked; if performance does not return after a CIP, it should be replaced.
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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.
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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.
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