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.
TechFlow 8040 LP-400 Membrane
₺43,435.17
VAT included · Made to order · Free shipping
Installation is a service · plumbing is the customer’s responsibility
Free Shipping
Across Türkiye
Lead Time
Confirmed when the order is placed
Compatibility Support
Send us the size and we will tell you which part fits
Order by Phone
0850 304 95 25
- SKU
- WP-MB-011
- Category
- RO Membranes, Water Filters, Water Treatment Spare Parts, Reverse Osmosis Systems
Which capacity is enough for you? Let us find the unit that suits you best in six questions.
TechFlow · 8040 Low-Pressure Membrane
High-Capacity Industrial Treatment with the TechFlow 8040 LP-400 Membrane
The TechFlow 8040 LP-400 Membrane is an 8 inch spiral-wound RO element in thin-film composite polyamide — the treating heart of a reverse osmosis system. Delivering high output at low pressure, it separates up to 99% of the dissolved salts and contaminants in the water.
- Size
- 8040 (8"×40")
- Active Area
- 400 ft² (37 m²)
- Type
- Low Pressure (LP)
01Problem & Solution
When a Membrane’s Life Ends, Output Falls
Problem
Poor Water Quality and High Energy
A membrane that has fouled or reached the end of its life loses salt rejection, produces less permeate and demands more pressure, which pushes the energy cost up.
Solution
High Output at Low Pressure
The TechFlow 8040 LP-400 Membrane cuts energy consumption by giving high permeate flow at low pressure. Separating up to 99% of dissolved salts and contaminants, it produces water of high purity.
02Key Features
Efficient, High-Capacity, Economical
The TechFlow 8040 LP-400 Membrane is an element that balances performance and cost for industrial RO systems.
Low-Pressure Efficiency
The LP (Low Pressure) construction gives high permeate flow at a low working pressure and saves energy.
400 ft² of Active Area
Roughly 37 m² of effective membrane area supports high-capacity production.
High Salt Rejection
It separates up to 99% of dissolved salts, heavy metals and contaminants from the water.
TFC Polyamide Construction
A thin-film composite polyamide spiral-wound design gives steady, dependable treatment.
Standard 8040 Compatibility
It fits standard 8 inch membrane vessels and can be retrofitted into existing systems.
A Wide Range of Uses
It is used in municipal drinking water, boiler feed water, food and pharmaceutical production and demineralisation lines.
03Technical Specifications
Membrane Specifications
| Feature | Value | What it does |
|---|---|---|
| Size | 8040 (8" × 40") | The physical size. If a spare does not match this, it will not go into the housing. |
| Membrane Type | TFC Polyamide | The structure of the membrane. Chlorine burns it, so a carbon filter in front is essential. |
| Active Area | 400 ft² (~37 m²) | |
| Test Flow | ~12,000 gpd (45.4 m³/day) | How much water passes through per unit of time. A low flow rate drops the pressure when more than one tap is open. |
| Salt Rejection | Up to 99% | How much of the dissolved salt is rejected. A higher figure means purer water. |
| Feed Water | < 1500 ppm (Brackish) | The inlet water quality the unit can cope with. Above this limit, pre-treatment is needed. |
04Applications
Where Is It Used?
The TechFlow 8040 LP-400 Membrane is used in industrial RO systems treating water of low to medium salinity.
- Industrial RO Systems
- Municipal Drinking Water
- Boiler Feed Water
- Food & Beverage Production
- Pharmaceutical Manufacturing
- Water Demineralisation
- Membrane Change / Renewal
- Process Water Lines
05How It Works
How Does the TechFlow 8040 LP-400 Membrane Work?
-
It Is Loaded into the Vessel
The membrane is loaded into the 8 inch vessel and connected to the RO system’s pressure line.
-
Water Is Fed Under Pressure
Water that has passed pre-treatment is delivered to the membrane surface by the high-pressure pump, at low pressure.
-
It Filters Through the Semi-Permeable Film
Only water molecules pass through the polyamide film; dissolved salts, heavy metals and contaminants are held back.
-
Permeate and Concentrate Separate
The treated water (permeate) is collected, and the salt-concentrated reject washes the membrane surface on its way to drain.
-
High-Purity Water
Low-conductivity, high-purity water is delivered to the system outlet and goes into use.
06Making the Right Choice
What Decides the Right Membrane
When choosing the TechFlow 8040 LP-400 Membrane, the feed water, the size and system compatibility must be assessed correctly.
Feed Water TDS
An LP membrane is ideal for low to medium salinity below 1500 ppm; seawater calls for an SWRO membrane.
Size & Vessel Fit
The 8040 size fits standard 8 inch vessels, and your system’s vessel size should be confirmed.
Capacity Requirement
The daily output required determines how many membranes are used and the system design.
Rejection vs Energy
If the highest salt rejection is the priority, choose a premium high-rejection membrane; if energy and flow are, choose LP.
07Maintenance and Use
Notes That Extend Its Life
- The membrane is sensitive to chlorine and oxidants; the chlorine in the feed water must be removed in pre-treatment, by activated carbon or similar.
- When the pressure drop rises, permeate falls or salt rejection is lost, a chemical clean (CIP) should be carried out.
- To hold fouling off, the pre-treatment stages — sediment and hardness removal — must be working properly.
- The membrane must not be left dry; during long shutdowns it should be stored in the preservative solution the manufacturer recommends.
08Frequently Asked Questions
Common Questions
What does the TechFlow 8040 LP-400 Membrane do?
It is the membrane element that treats water at the molecular level in a reverse osmosis system. It gives high permeate flow at low pressure and separates up to 99% of dissolved salts and contaminants.
What is the advantage of LP (low pressure)?
Producing a high flow at a low working pressure means the pump uses less energy. That brings running costs down, particularly on water of low to medium salinity below 1500 ppm.
Can it be used on seawater?
No. This membrane is designed for sources of low to medium salinity (brackish water). Seawater calls for high-pressure seawater (SWRO) membranes.
How does it differ from the Toray TM720D-400?
Both are 8040 elements with 400 ft² of area. The TechFlow LP-400 balances performance and cost through low pressure and high flow; the Toray TM720D-400 stands out for higher salt rejection (99.8%) and premium materials.
What shortens its life?
The greatest risk is chlorine and oxidants; if the chlorine in the feed water is not removed, the membrane is irreversibly damaged. Inadequate pre-treatment and cleaning left too late also shorten its life.
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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
2 years · manufacturerThe system is covered by a 2-year manufacturer warranty. During the warranty period, labour and parts are free for faults arising from manufacture or installation. Consumables such as filters, membranes and resin are outside warranty cover — they are replaced when their service life ends; they do not fail.
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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