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{"title":"Rectangular Non Woven Fabric Air Pre Filter with Galvanized Steel Frame for","imgUrl":"https:\/\/img.chinax.com\/nimg\/bc\/e0\/374202d734a77c4e51644850aeef-200x200-1\/rectangular_non_woven_fabric_air_pre_filter_with_galvanized_steel_frame_for_manufacturing_plant.jpg","attrs":{"Brand Name":"ZJNF","Model Number":"Pre Filter","Place of Origin":"Shenzhen","Shape":"Rectangular"}}
{"title":"Industry G3 G4 Galvanized Steel Panel Pre Filter For Air Purifier With","imgUrl":"https:\/\/img.chinax.com\/nimg\/67\/03\/54533240114c74bef71155cc8f0a-200x200-1\/industry_g3_g4_galvanized_steel_panel_pre_filter_for_air_purifier_with_rectangular_shape_chemical_and_moisture_resistance.jpg","attrs":{"Brand Name":"ZJNF","Model Number":"Pre Filter","Place of Origin":"Shenzhen","Type":"Panel"}}
{"title":"Capture Large Particles Resistance Non Woven Fabric Pre Air Filter With Airflow","imgUrl":"https:\/\/img.chinax.com\/nimg\/6c\/e6\/124128c72755a3dea77dcfce2599-200x200-1\/capture_large_particles_resistance_non_woven_fabric_pre_air_filter_with_airflow_capacity.jpg","attrs":{"Brand Name":"ZJNF","Model Number":"Pre Filter","Place of Origin":"Shenzhen","Airflow Capacity":"High Airflow Capacity"}}
{"title":"Rectangular Airflow Capacity Non Woven Fabric Air Pre Filter With Chemical And","imgUrl":"https:\/\/img.chinax.com\/nimg\/5d\/5c\/cb99c6c5e72009ce7e41d0258ec0-200x200-1\/rectangular_airflow_capacity_non_woven_fabric_air_pre_filter_with_chemical_and_moisture_resistance.jpg","attrs":{"Brand Name":"ZJNF","Model Number":"Pre Filter","Place of Origin":"Shenzhen","Working Principle":"Capture Large Particles"}}
{"title":"Galvanized Steel Air Pre Filter For Capturing Large Particles In Manufacturing","imgUrl":"https:\/\/img.chinax.com\/nimg\/cc\/36\/a98e91a13f5700ccb832aecf8290-200x200-1\/galvanized_steel_air_pre_filter_for_capturing_large_particles_in_manufacturing_plants.jpg","attrs":{"Brand Name":"ZJNF","Model Number":"Pre Filter","Place of Origin":"Shenzhen","Item":"Pre Air Filter"}}
{"title":"Initial Resistance 6-15Pa Polyester Air Pre Filter for Better Air Circulation","imgUrl":"https:\/\/img.chinax.com\/nimg\/96\/8f\/9ef61a699266f0537625da72b200-200x200-1\/initial_resistance_6_15pa_polyester_air_pre_filter_for_better_air_circulation.jpg","attrs":{"Brand Name":"ZJNF","Place of Origin":"Guangdong, China","Payment Terms":"tt lc PayPal credit card","Minimum Order Quantity":"1"}}
Primary pre-filters serve as the first line of defense in air purification systems, primarily capturing large particles ≥5μm (such as dust, pollen, and hair) to protect downstream medium- and high-efficiency filters, extending their lifespan. Their core functions include:
Coarse Filtration: Made from materials like non-woven fabric, nylon mesh, or metal mesh, with filtration efficiency of 30%-90% (for 5μm particles).
System Protection: Reduces load on medium/high-efficiency filters, lowering maintenance costs.
Types & Structure
By Filtration Grade
G1-G4: European standard EN779 classification, with G4 achieving 70%-90% efficiency (5μm).
By Filter Material
Reusable: Metal mesh or nylon mesh (e.g., aluminum-frame pre-filters).
Disposable: Non-woven fabric or synthetic fiber (e.g., flat panel pre-filters).
By Design
Flat Panel: Low cost, suitable for HVAC systems.
Replacement criteria: Pressure drop reaches 2-3× initial resistance or visible dust accumulation.
Typical Applications
HVAC Systems: Pre-filtration for downstream protection.
Cleanrooms: Air return filtration or pre-stage for HEPA filters.
Industrial: Air compressor or gas turbine intake pre-filtration.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2003
Total Annual:
3000000-4000000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
Shenzhen ZhongJian South Environment Co., Ltd was founded in 2003.
Which is the only high-tech technology company in Southern China with CNAS certification
We are mainly engaged in Designing Manufacturing, Testing & Verification, Manufacturing Processes and Quality Control, ... Shenzhen ZhongJian South Environment Co., Ltd was founded in 2003.
Which is the only high-tech technology company in Southern China with CNAS certification
We are mainly engaged in Designing Manufacturing, Testing & Verification, Manufacturing Processes and Quality Control, ...
9th Floor, Block C, Coolpad Building, Intersection Of Keyuan Avenue And Baoshen Road, Nanshan Gaoxin North District, Songpingshan Community, Xili Street, Shenzhen city, Guangdong, China
