What is an overspray filter?
An overspray filter, or paint arrestor, is the paint filter in the exhaust air of a spray booth. It captures the overspray produced during spraying and prevents paint mist from spreading through the workshop. This protects employees’ health, keeps freshly painted surfaces clean and helps to comply with emission limits.
What types of paint filters / overspray filters are there?
Dry separators have become the established choice for spray booths. We supply four systems developed specifically for this purpose: pleated cardboard filters, SprayMesh, uCube and Paint-Stop filter mats.
Pleated cardboard filters
- Extremely long service life
- up to 6 times longer service life than any other filter type
- Lower transport and storage costs
- Space-saving and foldable thanks to the concertina design
- Versatile use
- Lacquers, polyester, adhesives, varnishes, paints
The perforated pleated cardboard filters are built on the principle of inertial separation. As the sketch shows, the design of this filter forces the laden air stream to change direction several times. The particles, which are heavier than air, therefore adhere to the walls, while the air stream continues without significant obstruction. The filters formed by the concertina design fill up with particle deposits while the air continues to circulate freely through the holes, even when the filter is almost saturated. The efficiency of the pleated cardboard filter increases as saturation increases. It need only be changed at the last moment, unlike the “mat filter”, which quickly loses efficiency as saturation increases. Depending on the quality of the paint or the sprayed product, the efficiency can reach 98 % (high solids). The geometric design of the filter promotes an even distribution of the face velocity.
Its construction makes the pleated cardboard rigid, so it only needs to be held at the top and bottom and requires no intermediate support. Thanks to the Venturi effect, the geometry achieves an efficiency of up to 98 %. The process is suitable for a wide variety of products: paints (conventional, 2K, polyester, alkyd, waterborne), glass fibres, wax, tar, glue and adhesives, Teflon, polyurethane and silicones. It is used in the metal and wood industries, vehicle body repair, the plastics industry, by automotive accessory manufacturers and in the food industry, among others.
Any dry or wet booth can be converted to pleated cardboard filters. We will be happy to advise you.
SprayMesh
- Ideal for spray booths
- Specifically designed to separate paint mist in spray booths.
- Very high efficiency
- High holding capacity and long service life
- Versatile use
- Adhesives, air-drying paints, primers, epoxy resins, PU paints and stains
SprayMesh consists of 5 to 8 layers of paper (partly from recycled stock). It is used in paint mist extraction systems with dry separation.
Compared with conventional filters, SprayMesh offers better airflow, lower operating and disposal costs, less maintenance and a lower fire load in the extraction system. The filters keep their shape, are quick to install and change, and last longer with higher efficiency.
Standards and classification:
- meets the requirements of BGI 740 (spray rooms and equipment for liquid coating materials)
- fire behaviour to DIN 4102-B2
- flame-retardant to DIN 53438 Part 3, class F1
uCube
- Ideal for spray booths
- Specifically designed to separate paint mist in spray booths.
- Very high efficiency
- Very high efficiency of 99.45 % and a holding capacity of over 30 kg
- High efficiency
- optimum airflow, longer filter service life, quick installation and easy transport
uCube is an overspray filter developed specifically for industrial painting applications. It belongs to the group of dry separators, which filter paint mist from the air without using water. The uCube features a compact design and modular construction, which allows it to be adapted flexibly to different requirements and spray booths.
The filter cubes offer a large surface area and reliably remove paint mist from the exhaust air. This improves the air quality in the booth and reduces overspray on the painted parts.
| Model | Length × height × width |
|---|---|
| uCube 300 | 48.7 × 48.7 × 29.7 cm |
| uCube 500 | 48.7 × 48.7 × 49.7 cm |
Paint-Stop filter mats
Our Paint-Stop filter mats are made from glass fibres and synthetic media in G2/EU2 to F5/EU5 and correspond to the filter classes of EN 779. Thanks to their high-quality materials, they are also non-combustible to DIN 4102. Resistance to acetone and freedom from silicone attest to their good quality. In filter class G3, the mats are 70 mm thick and therefore offer a high dust holding capacity. The progressive depth structure of the Paint-Stop filter mats ensures that paint and dust particles are retained throughout the entire depth of the material. The sides are coloured to ensure correct use: the yellow side, with antibacterial dust binders, separates dry dust, while the green side separates the paint-mist-laden air and so protects exhaust ducts, fans and motors from paint deposits.