China G4 DPA Bag Type Paint Mist Filter - 3D Diamond-Shaped Media, 90% Efficiency, Suppliers & Factory Direct
🏭 Application Area
DPA Bag type paint mist filters are widely used in spray booths and air filtration processes to intercept over spray and sludge generated from high-solid coatings, powder coatings, water-based coatings, multi-component coatings, colorants, and adhesives.
🔬 Filter Media Materials
The primary material of the DPA paint over spray filter is specially treated glass fiber, but the secret lies in its overall structural design and chemical treatment.
Below is a detailed breakdown of the material composition and features of the DPA paint over spray filter:
When wet paint particles contact the glass fiber surface, they do not adhere to it. Instead, they penetrate deeper into the filter with the airflow for more thorough capture. This prevents surface clogging and significantly extends service life.
Does not absorb moisture, maintaining the dryness and structural integrity of the filter material, thereby preventing collapse or failure due to water absorption.
Chemically stable — does not react with solvents or components in the paint, ensuring a stable and safe filtration process throughout its service life.
The DPA filter is not a simple piece of filter cloth but is constructed from fluffy glass fibers into a thick, highly porous three-dimensional maze-like structure.
Paint over spray particles entering this maze are not simply "blocked." Through collision, interception, and diffusion mechanisms, they are continuously captured by fiber surfaces. Due to the non-stick property, particles move deeper until their kinetic energy is depleted, firmly locking them inside.
This structure allows the filter to be utilized uniformly from the inside out, providing a very high dust-holding capacity — far exceeding that of ordinary paper or cotton filters.
Due to the presence of electrical equipment and organic solvents in spray booth environments, fire safety is paramount. During manufacturing, special flame retardants are added to the glass fibers of DPA filters. This gives them self-extinguishing properties, meaning they will automatically extinguish after being removed from an open flame, significantly reducing the risk of fire.
To maintain structural stability and facilitate installation, DPA filters require a sturdy frame.
The most commonly used material, offering cost-effectiveness, sufficient strength, and a certain level of corrosion resistance for standard spray booth environments.
Used in more corrosive or demanding environments, such as spray booths with high humidity or specific chemical environments requiring enhanced durability.
📊 The Efficiency of DPA Bag Type Paint Mist Filter
The efficiency of currently available filters are 90%, and they can be selected based on specific requirements. The rational selection of filter efficiency and face velocity contributes to comprehensive economic benefits.
⏳ Service Life of Filters
As dust accumulates on the filter media, the resistance increases. When the resistance reaches an unreasonable level, the filter must be discarded. Sometimes, excessive resistance can cause previously captured dust to become dislodged and re-enter the airflow; when this risk arises, the filter should also be replaced.
The resistance of a filter increases with higher airflow rates. By increasing the surface area of the filter media, the relative velocity of air passing through the filter can be reduced, thereby decreasing the resistance.
Replace the filter when resistance reaches an unreasonable level, or when there is a risk of previously captured dust being dislodged back into the airflow.
Increasing the surface area of the filter media lowers the relative air velocity through the filter, thereby reducing resistance and extending usable service life.
📋 Specification
Remarks: (1) Initial resistance tolerance of ± 10% (2) Support customer size