Cleanable primary filter for mother frameThe main difference from the initial filter with protective net:

1. The initial filter cotton of the washable mother and child frame can be replaced by oneself, and the original filter frame and wire support frame can be used for secondary use to reduce costs;

2. The washable primary filter of the mother frame should have a larger dust holding capacity, air volume, and service life than the primary filter with a protective net under the same resistance conditions;

3. Generally speaking, the washable primary filter for the mother frame is slightly more expensive than the primary filter with a protective net.

Picture of the washable primary filter for the mother and child frame

The most common types of washable primary filters on the market areG3 primary filterlevelG4 level primary filter.

G3 level washable primary filter for mother frame is mainly suitable for pre filtration of air conditioning and ventilation systems, clean room return air filtration, and pre filtration of local high-efficiency filtration devices.
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The G3 washable primary filter for mother and child frames is mainly suitable for pre filtration of air conditioning and ventilation systems, clean room return air filtration, and pre filtration of local high-efficiency filtration devices.

G3 level washable primary filter for mother frame features:
Frame: Aluminum alloy, galvanized sheet, thickness: 17mm, 21mm, 25mm, 46mm and other models.
● Filter material: High quality chemical fiber non-woven fabric filter material, with high air volume, low resistance, and large dust holding capacity.
● Filtration efficiency: 85%.
Filtering level: G3 (EN779).
Using surface rust proof treated wire frame support and welding support can effectively fix and protect the filter material from damage during use.

G4 level washable mother frame primary filter is mainly suitable for pre filtration of air conditioning and ventilation systems, clean room return air filtration, and local high-efficiency filtration devices. It is mainly used to filter dust particles with a particle size of 5um or above.

G4 level washable mother frame primary filter features:
Frame: Aluminum alloy, galvanized sheet, thickness: 17mm, 21mm, 25mm, 46mm and other models.
● Filter material: High quality chemical fiber non-woven fabric filter material, with high air volume, low resistance, and large dust holding capacity.
● Filtration efficiency: 90%.
Filtering level: G4 (EN779).
Using surface rust proof treated wire frame support and welding support can effectively fix and protect the filter material from damage during use.
Standard technical parameters for G4 level washable primary filter for mother frame:

Article source: http://www.zj-filter.com/