---
product_id: 454425316
title: "KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm"
brand: "knl"
price: "KD 9.00"
currency: KWD
in_stock: true
reviews_count: 6
url: https://www.desertcart.com.kw/products/454425316-knl-nf40-tfc-dry-100-gpd-nf-membrane-barc-licensed
store_origin: KW
region: Kuwait
---

# 100 GPD flux rate ~24 L/hr 0.001 μm ultra-fine pore size BARC licensed & ISO 9001:2015 certified KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm

**Brand:** knl
**Price:** KD 9.00
**Availability:** ✅ In Stock

## Summary

> 💧 Drink Smart, Live Pure — The Nano Filtration Revolution!

## Quick Answers

- **What is this?** KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm by knl
- **How much does it cost?** KD 9.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/454425316-knl-nf40-tfc-dry-100-gpd-nf-membrane-barc-licensed)

## Best For

- knl enthusiasts

## Why This Product

- Trusted knl brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fast Flow, Less Waste:** Delivers 24-25 liters/hour with minimal water wastage vs traditional RO
- • **BARC-Backed Reliability:** Trusted technology licensed by Bhabha Atomic Research Centre for assured purity
- • **Optimized for Domestic Use:** Perfectly compatible with 100 GPD pumps & TDS 200-350 ppm feed water
- • **High-Performance Filtration:** Eliminates fluoride, arsenic, pesticides & 100% microbes with nano precision
- • **Effortless Mineral Retention:** Keeps 45%±5% natural minerals for healthier hydration

## Overview

The KNL NF40 TFC Dry Nano Filtration membrane offers a cutting-edge 0.001 micron pore size with a robust flux rate of ~24 liters per hour, licensed by BARC and ISO 9001:2015 certified. Designed for domestic water purifiers handling feed water TDS between 200-350 ppm, it reduces total dissolved solids by 40-50% while naturally retaining essential minerals. This membrane removes harmful contaminants including fluoride, arsenic, pesticides, and microbes, ensuring mineral-enriched, hygienic drinking water with less wastage and longer service life compared to conventional RO membranes.

## Description

Nano Filtration TFC dry NF membrane 100 GPD by BARC (Bhabha Atomic Research Centre transferred technology). Its pore size is 0.001 micron, membrane output volume (flux rate) is between 22-26 litres/hr and rejection rate is 40% to 50%, retains healthy mineral (TDS) between 50% to 60% in drinking water naturally without TDS controller/TDS adjuster (further minor variation may be place to place and feed water quality). Initially the membrane need to flush 20-30 minutes with FR 450 and then check the result. The result would be as per mentioned descriptions. The membrane is suitable for almost all kind of electric operated RO domestic water purifiers with good quality openable membrane housing, FR 450 and compatible with 100 GPD pump (working pressure inside membrane housing 80 PSI to 90 PSI) and must be used with good quality Sediment, Precarbon filter. In case of excessive tap water pressure (due to high rise building or pressure pump used in overhead tank) the Pressure Regulator valve is recommended to use else membrane may get damage early and the result may not be satisfactory. The membrane is suitable for soft water having TDS between 200 ppm to 350 ppm or max 400 ppm. The water born microbes/germs/virus size remains between 0.01 micron to 5 micron those are eliminated with 100% surety and being flushed through rejected water. The membrane also eliminates harmful chemicals, pesticides, herbicides, toxicity, bromide, fluoride, cyanide, arsenic etc and other impurities from water and flushes them through rejected water but UV & UF cannot. Service life is 15000 (condition applied) litres or 18 months whichever is earlier. Medically recommended range of TDS in drinking water is 100 ppm to 300 ppm. Demineralized or low TDS in drinking water causes health problem in long run like slow digestive system, hair fall, obesity, bad cholesterol etc. TDS adjuster allows impurities back into drinking water if raw water contains arsenic, bromide, fluoride, pesticide etc.

## Features

- TFC, Dry, KNL-NF40 NF (Nano Filtration) membrane 100 GPD, Flux rate (23-26) litres/hr, pore size 0.001 micron, BARC licensed & by ISO certified 9001:2015 co., suitable for feed water TDS between 200 ppm to 350 ppm, for better result use 100 GPD pump with working pressure (80 PSI to 85 PSI) and 450 cc FR. Reduces TDS between 40% to 50% may be in few cases up to 55%. Result may vary a little further more due to place to place and due to feed water hardness compositions ratio.
- The water taste varies with minerals contents and therefore user may experience heaviness while drinking with more TDS water. The membrane eliminates all the impurities like fluoride, bromide, arsenic, germs, bacteria, virus, chlorine, cyanide, pesticides, herbicides etc. from drinking water and flushes them through rejected water. Always use new FR 450 with the membrane, partial blocked FR may lead unsatisfactory result.
- Service life is around 15000 ltrs or 18 months whichever is earlier (subject to use with good quality sediment & activated carbon block carbon), retains minerals in drinking water naturally up to 60%, flux rate around 25 ltr/hr, water wastage is very less compare to RO membrane. Recommended to use good quality sediment and block carbon (pre carbon) filter else the sediment filter will allow dirt particles and will led early clogging of the membrane.
- As per medical recommendations, the drinking water should have minerals (TDS) between 100 ppm to 300 ppm and acceptable range of pH is between 6.5 to 8.5. Low TDS (mineral) drinking water cause health problems in log run. The water taste mainly depends on TDS, and therefore with more TDS in drinking water, user may feel water hardness if used to with ro water or normal bottle packed water.
- TDS adjuster or controller is nothing but a bypass system to flow the water through carbon filter and then mixed with membrane purifier water in a proportion to maintain TDS at desired level. But the bypass system allows impurities like arsenic, bromide, fluoride, cyanide and other impurities if exist in raw water. Therefore always use suitable membrane as per your raw water hardness that will give you more safe, healthy and mineral enriched water than TDS adjuster technology.
- Users/Buyer are requested to check the TDS of feed water with good quality TDS meter and then place the order. The feed water TDS must be between 200 ppm to 350 ppm or max 400 ppm. And users are also requested to check their/his/her water purifier cabinet space, pump and other specification compatibility before placing order.
- Contaminants molecule size remain greater than 0.01 microns, germs size from 0.027 microns to 5 microns, water molecule size is 0.000283 microns, dissolve compositions of mineral molecule size remain less than 0.0009 microns, but all NF Membrane pore sizes are 0.0015, 0.0010, 0.0005, 0.0002 microns & RO membrane pore size is 0.0001 microns, therefore the NF Membrane & Ro membrane does the job far better than the UV and TDS controller system.
- In case of high rise building or where the large concrete overhead tank is used, the tap water pressure may be more than 4 PSI, in that case user are requested to use PRV else the nf membrane may get malfunctioned early.
- Installation guidelines: Before inserting new membrane, make sure the membrane housing is clean else loose particles led to blockage of FR. The KNL-NF80 membrane need to flush for 30-40 minutes and then check the result. Water taste with more TDS may some people feel hard compare to RO water or normal bottle packed water but medically healthy to intake mineral enriched drinking water. Always use new FR 450 with the membrane, partial blocked FR or if used in reverse order the membrane will get damage early/immediately.
- Warranty details - The membrane does not cover any warranty. The performance of the membrane and filters depends on user skill with proper installation, feed water quality, and pump with required working pressure (80-85) PSI. Once put to use cannot be taken back except in case of manufacturing defect.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | TFC Dry Nanofiltration Sheet |
| Product Dimensions | 29.5D x 5W x 5H Centimeters |
| Item Weight | 210 Grams |
| External Testing Certification | BARC |
| Product Benefits | retains minerals 45% (± 5%) naturally in drinking water, gives water 24-25 liter/hr but RO membrane gives 12-15 liter/hr, service life is more due to less water water wastage, removes all contaminants from feed water and gives mineral enriched and hygiene drinking water. |
| Brand | KNL |
| Net Quantity | 1.00 Count |
| Number of Items | 1 |
| Manufacturer | KNL Trading Co. |
| Country of Origin | India |
| Item model number | TDS (200-350) ppm |
| ASIN | B0B6FLVRW1 |

## Product Details

- **Material:** TFC Dry Nanofiltration Sheet
- **Product Dimensions:** 29.5D x 5W x 5H Centimeters
- **Item Weight:** 210 Grams
- **External Testing Certification:** BARC
- **Product Benefits:** retains minerals 45% (± 5%) naturally in drinking water, gives water 24-25 liter/hr but RO membrane gives 12-15 liter/hr, service life is more due to less water water wastage, removes all contaminants from feed water and gives mineral enriched and hygiene drinking water.

## Images

![KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm - Image 1](https://m.media-amazon.com/images/I/61DqgIUvOcL.jpg)
![KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm - Image 2](https://m.media-amazon.com/images/I/81Gpd83TrXL.jpg)
![KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm - Image 3](https://m.media-amazon.com/images/I/71d8NWXo61L.jpg)
![KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm - Image 4](https://m.media-amazon.com/images/I/71WvR0RO7uL.jpg)
![KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm - Image 5](https://m.media-amazon.com/images/I/81UMTi4dveL.jpg)

## Available Options

This product comes in different **Model** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Must buy
*by J***F on 27 July 2021*

I replaced my R.O. membrane with this membrane after extensive research online. A local R.O. guy came and installed sediment filter, carbon filter, uv light n NF membrane. It's easy to install just like an ordinary R.O. membrane. Any professional working in field of water purifier technology can install it. My water TDS was as low as 45 coz of R.O. filter. My tank TDS is 450. Now after installing this d tds of drinkable water is 100-130.The water tasted sweet now as compared to earlier. It is a product which should be promoted irrespective of whatever tds your area has. As this nf comes with different models for different tds of water. Replace this nf with ur R.O. membrane as much soon as possible to drink good quality of water

### ⭐⭐⭐⭐ Good one but little bit costly
*by S***A on 1 November 2024*

After going through all the article related to RO and water condition, I decide to go with nano filter as it best serves the purpose. Nano filter is as effective as a RO as both remove all the micro-organisms/virus/chemical/lead/arsenic present in water while reducing the TDS. There is no difference is water quality except the TDS level when comparing RO with nano filter. While RO suppress the TDS to below 50, then you have to use mineral/alkaline cartridge to bring back the optimal TDS level but in case of nano filter it is in range of 150-400 PPM which save your money on using additional mineral cartridge. Also, TDS adjuster in RO is a big scam so never fall for that marketing gimmick, if you have TDS controller in your existing RO then stop using it, ask technician to close that valve.Go with RO only when your water is not consumable even only one time or even after using some gravity filter, if those conditions are not true then you do not need a RO. Also, water wastage in RO is much higher like for every one glass of water, you are draining 3 glasses of water.I am using NF-40 filter and my tap water TDS is around 450 PPM, after using this filter TDS drop to 225 PPM and water wastage is around little bit more than one glass for every one glass of water (50-55% wastage). Overall, I am happy with my purchase.

### ⭐⭐⭐⭐⭐ good for below 200 tds water
*by G***Y on 16 May 2025*

Work very good but price is high

## Frequently Bought Together

- KNL NF40, TFC Dry 100 GPD NF Membrane, BARC Licensed, Flux Rate Around 24 ltrs/hr, Pore Size 0.001 μ, Reduces tds (40-50)%, Used in Domestic NF/RO Water Purifier, Suitable for Input TDS (200-350) ppm
- KNL RO/NF opeanable Membrane Housing/casing, Food Grade Plastic, Compatible with 75 GPD, 80 GPD and 100 GPD Membrane
- KNL RO/NF Sediment & Activated Block Carbon (Pre Carbon) Filter/Cartridge/Candle Set with pushfit Elbows Suitable for All RO or NF Water Purifier

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-24*