Descripción
|
Type
|
Applications/Comments
|
Weight
(g/m2) |
Thickness
(mm) |
Retention Characteristics (μm)
|
Collection Efficiency
(%, 0.3μm DOP) |
|
No. 3 Ashless
|
Retains medium particles, fast flow rate. For analysis of soils, fertilizers, cement, and minerals.
|
113
|
0.23
|
Medium (5-10)
|
80
|
|
No. 5A Ashless
|
Retains coarse particles and gelatinous precipitates, fast flow rate. For filtration of hydroxides, metallic aerosols, environmental monitoring, silica content determination in steel.
|
97
|
0.22
|
Coarse and Gelatinous (>10)
|
75
|
|
No. 5B Ashless
|
Retains medium particles, such as CaCO3, CaCO4, PbSO4, MnCO3, ZnCO3, ZnS, AgCl
|
108
|
0.21
|
Medium (5-10)
|
90
|
|
No. 5C Ashless
|
Retains fine particles, such as SrSO4, BaSO4, HgCrO4, and collodial dispersions. Filter for general gravimetric analysis.
|
118
|
0.22
|
Fine (<5)
|
93
|
|
No. 6 Ashless
|
Retains medium-fine particles, trace, and precious metals.
|
103
|
0.20
|
Medium-Fine (2-10)
|
90
|
|
No. 7 Ashless
|
Highest purity for retaining medium particles. Filter for precise gravimetric analysis.
|
87
|
0.18
|
Medium (5-10)
|
85
|
|
No. 4A Hardened Ashless
|
Retains fine particles, slow flow rate. High wet strength, suitable for use under high pressure, with good pH and chemical resistance.
|
96
|
0.12
|
Very Fine (<5)
|
90
|
