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NF series

Product catalog summary

Overview
The Alfa Laval nanofiltration membranes are designed for rejecting organics with a molecular weight above 200 while allowing partial passage of monovalent salts. These membranes are made from a composite polyamide type and are shipped dry in a sanitary, full-fit configuration to minimize stagnant spaces.

Specifications
The membranes are available in different models, including NF97, NF99, and NF99 HF, with varying rejection rates for MgSO4 (≥97% to ≥98%). The elements comply with EU and FDA regulations.

Dimensions and Configurations
Membrane elements come in various sizes, with outer diameters ranging from 2.5" to 8.0" and lengths from 17" to 40". Feed spacer thickness varies from 30 mil to 65 mil.

Operational Limits
- Continuous operation pH range: 3-10
- Max operating pressure: 55 bar (800 psi) at 30°C
- Max operating temperature: 50°C at 33 bar
- Free chlorine concentration: <0.1 ppm

Cleaning Guidelines
Initial cleaning is required before use, with recommendations for alkaline washes. The cleaning process should follow Alfa Laval's guidelines, and water quality should meet specified standards.

Important Information
Spiral elements must remain moist after initial wetting, and incompatible chemicals should be avoided. Exceeding recommended operational limits voids the warranty.

Operation Guidelines
Avoid abrupt pressure or flow changes. Gradual transitions are recommended during start-up and shutdown to prevent damage. Specific procedures for pressure and temperature adjustments are outlined.

Contact Information
For updated contact details, visit Alfa Laval's website at www.alfalaval.com.

Catalog excerpts

Element configuration Alfa Laval NF97 Outer diameter 2.5" 3.8" 8.0" Length without ATD 17" 38" 38" Feed spacer thickness (mil) 30 30 - 48 48 48 - - 65 Element configuration Alfa Laval NF99 Outer diameter 2.5" 3.8" 8.0" Length without ATD 17" 38" 38" Feed spacer thickness (mil) 30 - 30 48 48 48 - - 65 Element configuration Alfa Laval NF99 HF Outer diameter 2.5" 3.8" Length without ATD 17" 40" Feed spacer thickness (mil) 30 30 48 - Typical cross-flow m3/h* (gpm)* and max. pressure drop bar (psi) at cP 1 Outer diameter 2.5" 3.8" 8.0" Feed spacer thickness m3/h bar (gpm) (psi) m3/h bar (gpm) (psi)...

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Product name Design membrane area (m2) Part no. Net dry weight (kg) Alfa Laval NF97-2517/30 1.1 522324 0.8 Alfa Laval NF97-2517/48 0.7 522325 0.8 Alfa Laval NF97-3838/30 7.3 522326 2.8 Alfa Laval NF97-3838/48 5.5 522327 2.8 Alfa Laval NF97-8038/48 28.3 522328 13.0 Alfa Laval NF97-8038/65 21.1 522329 13.0 Alfa Laval NF99-2517/30 1.1 519769 0.8 Alfa Laval NF99-2517/48 0.7 519770 0.8 Alfa Laval NF99-3838/48 5.5 522313 2.8 Alfa Laval NF99-8038/30 39.9 522314 13.0 Alfa Laval NF99-8038/48 28.3 522315 13.0 Alfa Laval NF99-8038/65 21.1 522316 13.0 Alfa Laval NF99 HF-2517/30 1.1 522310 0.8 Alfa Laval...

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. ESE00626EN 0801 The information contained herein is correct at the time of issue, but may be subject to change without prior notice. How to contact Alfa Laval Contact details for all countries are continually updated on our website. Please visit www.alfalaval.com to access the information direct.

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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