Macherey-Nagel glass fibre filter circles MN GF-3, 0.6 µm

Product information "Macherey-Nagel glass fibre filter circles MN GF-3, binder-free, 0.6 µm (Ø 25–270 mm), 185 mm"

Macherey-Nagel describes the MN GF-3 glass fibre filter circles as binder-free glass fibre paper for collecting suspended solids in drinking water and in natural and industrial wastewater. According to the data sheet, they are also intended for laboratory filtration and air sampling. The filter consists of borosilicate glass microfibres, is 0.27 mm thick and weighs 52 g/m². The average retention capacity is 0.6 µm and the maximum temperature is 500 °C.

MN GF-3 or MN GF-1 glass fibre filter circles

According to Macherey-Nagel, the GF-3 retains somewhat better than the GF-1. Both have the same grammage, but differ in retention capacity and filtration time:

Value	MN GF-3	MN GF-1
Average retention capacity	0.6 µm	0.7 µm
Grammage	52 g/m²	52 g/m²
Thickness	0.27 mm	0.28 mm
Filtration speed	25 s	12 s
Maximum temperature	500 °C	500 °C

At 0.6 µm, the GF-3 retains more finely than the GF-1 at 0.7 µm. In return, filtration at 25 s takes more than twice as long as with the GF-1 at 12 s. If you need a finer filtrate and accept the longer time, choose the GF-3. The GF-1 is intended for higher speed.

Determining suspended solids

For the determination of suspended solids according to DIN EN 872:2005, Macherey-Nagel names the MN 85/90 BF. At 0.27 mm, the MN GF-3 is considerably thinner than the MN 85/90 BF at 0.51 mm and, at 0.6 µm, has a somewhat coarser retention capacity than the latter at 0.5 µm. If the method does not prescribe a specific filter type, the GF-3 is an option as a binder-free alternative when suspended solids are collected on a glass fibre filter and the residue is dried or ignited in an oven.

Typical applications

Collecting suspended solids in drinking water and wastewater
Laboratory filtration requiring a retention capacity of 0.6 µm
Air sampling with particle collection on the filter
Gravimetric evaluation of the residue after drying or ignition at up to 500 °C

Available diameters

13 diameters from 25 to 270 mm are available. The diameter depends on the funnel or filter holder. The table lists the pack size and the manufacturer’s item number for each size.

Diameter	Pieces per pack	MPN
25 mm	100	4130025
37 mm	100	4130037
45 mm	100	4130045
47 mm	100	4130047
55 mm	100	413005
70 mm	100	413007
90 mm	100	413009
110 mm	100	413011
125 mm	100	413012
150 mm	100	413015
185 mm	100	413018
240 mm	100	413024
270 mm	100	413027

Technical details

All figures are typical values according to Macherey-Nagel and not a specification.

Type	MN GF-3
Material	Borosilicate glass microfibres
Binder	none
Average retention capacity	0.6 µm
Grammage	52 g/m²
Thickness	0.27 mm
Filtration speed	25 s
Maximum temperature	500 °C
Surface	smooth
Colour	white
Shape	filter circle
Diameter	25 to 270 mm
Pack contents	100 pieces

Scope of delivery

1 pack containing 100 MN GF-3 glass fibre filter circles in the selected diameter

Individual requirements and procurement service

Suction filters, filtration units, suction flasks, filter tweezers and vacuum pumps are also available. Enquiries about accessories, other types or larger quantities are handled by our procurement service.

Diameter:	185 mm