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Filter Papers Qualitative Grade 631 Ahlstrom - Munksjö

Filter Papers Qualitative Grade 631 Ahlstrom-Munksjö

SKU
R 179.40 - R 1,058.00
R 179.40
R 179.40 - R 1,058.00
R 179.40

This 15 µm, Medium Speed grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides. Grade 631 is used in air monitoring and gas filtration when high flow rate is needed. This grade is also found in routine cleanup analysis of insoluble liquids such as biological fluids and organic elements.

Ahlstrom-Munksjö 631- 15 µm, Medium Speed

Equivalent to Whatman Grade 4 or 4CHR.

Ahlstrom-Munksjo Cross Reference

How to Choose the Right Filter Paper Size?
The filter paper should be about 1.5 to 1.8 times the funnel diameter.

Please note the below grid is a recommendation of what diameter filter paper is compatible with glass or plastic filter funnels.

Diameter of filter funnel (mm) Diameter of filter paper required (mm)
35 55
45 70
55 90
65 110
75 125
90 150
100 185
125 215
150 240
180 320
220 400
260 500

When folded into a cone (typically in quarters), it should fit inside the funnel with about 5–10 mm extending above the rim for easy handling.

What is filter paper used for?

Filter paper is used to separate solids from liquids or gases, acting as a semi-permeable barrier that allows certain substances to pass through while retaining others. It's commonly used in laboratories for various applications, including filtration, sample preparation, and analysis.

 

What do the grades of filter paper mean?
 
Filter papers are available in different grades, which indicate the level of particle retention. Lower grades (e.g., Grade 1) have larger pores, while higher grades (e.g., Grade 4) have finer pores. Consider the thickness of the filter paper. Thicker papers can hold more material, but they may also reduce flow rate.

Delivery time

Please note: This product has a lead time of 5 to 7 days before your order can be processed and dispatched.