Glass filtration apparatus and accessories

DURAN® filter funnel

 

From DURAN® glass with its good thermal shock and chemical resistance. Filter funnels mate to the filtering flask via a conical rubber seal (GUKO).

Typical applications: qualitative inorganic analysis and preparative chemistry.

Cat. No. Porosity Capacity
ml		 Disk d
mm		 d1
mm		 h
mm		 ID
mm		 Pack
Quantity
25 852 0X * 1-5 50 35 10 130 40 1
25 852 1X * 1-5 75 45 10 130 56 1
25 852 2X * 1-5 125 60 10 140 71 1
25 852 3X * 1-5 500 95 22 200 106 1
25 852 4X * 1-5 1 000 120 22 320 135 1
25 852 6X * 1-4 4 000 175 30 400 202 1

* Substitute required porosity for X in the order number.

 

DURAN® Buechner funnel

 

From DURAN® glass with its good thermal shock and chemical resistance. The Buechner funnel features a glass support for membrane and paper filters.

 

Typical applications: qualitative inorganic analysis and preparative chemistry.

Cat. No. Capacity
ml		 Disk d
mm		 d1
mm		 h
mm		 Matching filter
paper
mm		 ID
mm		 Pack
Quantity
21 341 22 70 48 10 130 45 54 1
21 341 28 125 60 10 140 55 71 1
21 341 34 220 73 18 180 70 90 1
21 341 44 500 95 22 240 90 106 1
21 341 54 1 000 120 22 280 110 135 1

DURAN® filter crucible

 

From DURAN® glass with its good thermal shock and chemical resistance.

 

Typical applications: qualitative inorganic analysis and preparative chemistry.

Cat. No. Porosity Capacity
ml		 d
mm		 Suitable rubber
sleeve Cat. No.		 Suitable filter
adapter Cat. No.		 Pack
Quantity
25 851 0X * 2-4 8 24 29 201 14 24 316 16 10
25 851 1X * 1-4 15 28 29 201 21 24 316 22 10
25 851 2X * 1-5 30 36 29 201 26 24 316 26 10
25 851 3X * 1-5 50 46 29 201 31 24 316 32 10

*Substitute required porosity for X in the order number.

 

The glass filters are classified as being in porosity classes 0 to 5 according to their nominal maximum pore size. The following table shows the corresponding porosity range. The specified pore sizes always relate to the largest pore in the plate. This specification also characterises the minimum nominal size of particles which may be retained by the filtration.

 

Porosity table:

Porosity New identification mark
ISO 4793		 Nominal max.pore size (μm)
0 P 250 160-250
1 P 160 100-160
2 P 100 40-100
3 P 40 16-40
4 P 16 10-16
5 P 1.6 1.0-1.6