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Air filter classification standards

Air filter classification standards

Why do air filters mainly have primary air filters, medium air filters and high efficiency air filters? The reason is also very simple. Air filters are graded according to their filtration efficiency.

The classification of air filters was born: With the development of the Microelectronics industry, the requirements for air filters, especially efficient filters, have become stricter. The German standard DIN24183 has taken the lead in proposing &; Quot; Easiest to penetrate particle size & amp; Quot; (MPS) method, and the most easily penetrated particle size to detect the efficiency of air filters. In fact, different filter materials and different filter speeds are the most easily penetrated particle size is different, It is generally in the range of 0.11um-0.25um. Then the efficiency is tested with this particle size or used for scanning experiments.

MPPS is the most strict test standard at present. DOP is generally used for specific tests. DOP(o-dimethyldioctyl Ester) method: The experimental dust source is 0.3 um single dispersed phase DOP droplets, and the measurement dust instrument is a photometer, The filter efficiency of DOP particles is determined by the turbidity difference of the gas sample. At present, a large flow laser particle counter or condensation core counter is gradually used to scan the entire air surface of the filter.

The classification standards for each air filter are as follows:

Chinese Standard

European standards
EN779-1993

American DOP Act 0.3 um efficiency / %

ASHRA standard

Weight method efficiency/%

ASHRAE standard

colorimetric efficiency/%

Crude filter

G1

 

< 65

 

Crude filter

G2

 

65-80

 

Crude filter

G3

 

80-90

 

Medium filter

G4

 

>=90

 

Medium filter

F5

 

 

40-60

High school efficiency filter

F6

20-25

 

60-80

High school efficiency filter

F7

55-60

 

80-90

High school efficiency filter

F8

65-70

 

90-95

High school efficiency filter

F9

75-80

 

>=95

Sub-efficient filter

H10

> 85

 

 

Sub-efficient filter 

H11

> 98

 

 

Efficient Filter A

H12

> 99.9

 

 

Efficient Filter A

H13

> 99.97

 

 

Efficient Filter B

H14

> 99.997

 

 

Efficient FilterC

U15

> 99.9997

 

 

Efficient FilterD

U16

> 99.99997

 

 

Efficient FilterD

U17

> 99.999997

 

 

 

Classification Standard for Atmospheric Dust Counting Method

GB12218-89classification

particle size(μm)

≥5.0

≥1.0

≥0.5

Counting efficiency(%)

<40

40≤E<80

40≤E<80

70≤E<99

95≤E<99.9

GB/T14295-93classification

 

Crude effect

 

Medium

High school

Sub-efficient

particle size(μm)

 

≥5.0

≥1.0

≥0.5

Counting efficiency(%)

 

20≤E<80

20≤E<70

70≤E<99

95≤E<99.9

 

 European Filter Classification Standard

standard

EN779:1993

EN1882-1:1998

specifications

Weight method(%)
Arrestance

A colorimetric or counting method.(%)
Dust-spot 
Or Particle Efficiency

Most easily penetrated particle size method(%)
MPPS

G1
G2
G3
G4

E<65
65≤E<80
80≤E<90
90≤E

 

 

F5
F6
F7
F8
F9

 

40≤E<60
60≤E<80
80≤E<90
90≤E<95
95≤E

 

H10
H11
H12
H13
H14

 

 

85≤E<95
95≤E<99.5
99.5≤E<99.95
99.95≤E<99.995
99.995≤E<99.9995

U15
U16
U17

 

 

99.9995≤E<99.99995
99.99995≤E<99.999995
99.999995≤E

 

 American Air Filter Classification Standard

specifications

Counting method(%)Particle Efficiency

Weight counting(%)
Arrestance

 

test

Final resistance(Pa)
Final Resist

 

 

0.3~1.0μm

1.0~3.0μm

3.0~10.0μm

MERV1
MERV2
MERV3
MERV4

 

 

E3<20
E3<20
E3<20
E3<20

Aavg<65
65≤Aavg<70
70≤Aavg<75
70≤Aavg

75
75
75
75

E1 is the lowest average of the entire process of the four particle size intervals of 0.30-0 .40, 0.40-0 .55, 0.55-0 .70, 0.70-1 .0 μm; E2 is the lowest average of the four particle size ranges of 1.0-1 .3, 1.3-1 .6, 1.6-2 .2, 2.2-3 .0 μm; E3 is the lowest average of the four particle size ranges 4.0-4.0, 4.0-5.5, 5.5-7.0, 7.0-10.0 μm

MERV5
MERV6
MERV7
MERV8

 

 

20≤E3<35
35≤E3<50
50≤E3<70
70≤E3<80

 

150
150
150
150

MERV9
MERV10
MERV11
MERV12

 

E2<50
50≤E2<65
65≤E2<80
80≤E2<90

85≤E3
85≤E3
85≤E3
90≤E3

 

250
250 
250
250

MERV13
MERV14
MERV15
MERV16

E1<75
75≤E1<75
85≤E1<95
95≤E1

90≤E2
90≤E2
90≤E2
95≤E2

90≤E3
90≤E3
90≤E3
95≤E3

 

350
350
350
350

MERV17
MERV18
MERV19

 

≥99.97% IEST-A类
对0.3 μm 粒子        ≥99.99% IEST-C类              HEPA过滤器
   ≥99.999% IEST-D类

MERV20

对0.1~0.2μm 粒子, 扫描法≥99.999% IEST-F类 UEPA过滤器 

 

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Contact: manager.zhan

Phone: 15928853231

Tel: 028-87849573

Email: 2541565040@qq.com

Add: Chengdu Gaoxin West District Science and Technology Park

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