Pocket Filters
High filtration performance with low operating costs for industrial air systems.

Pocket Filters
Wetzel pocket filters stand out for their robust design and high filtration performance combined with low operating costs. Our quality management system, certified according to ISO 9001 and ISO 14001, ensures consistently high product quality. The Wetzel portfolio covers all filter classes according to ISO 16890 (EN 779:2012) in all standard dimensions. The materials used for the filter media and frames are self-extinguishing in accordance with DIN 53438 (F1). All pocket filters are manufactured with the required pocket length according to customer specifications.
WP Pocket Filters
WP pocket filters (filter classes M5 and M6) provide significantly extended service life while reducing operating costs – thanks to high separation efficiency, a lower pressure drop progression, and excellent dust holding capacity.

Technical Specifications
Operational up to 70°C and 100% relative humidity
Maximum operational reliability thanks to leak-free, welded filter pockets molded into the PU front frame and welded aerodynamic spacers
Reliable operation even with filter loads well over 5,000 m³/h
Documentation of stability through burst pressure tests exceeding 5,000 pascals
Available up to filter class ISO ePM10 (M6 according to EN 779)
Synthetic Fine Filters
Synthetic fine filters (for pocket filters in filter classes M6–F9) are multi-layer filter media that can be equipped with various pre-filter media upon request to increase dust-holding capacity and thereby extend service life.
Available in various sizes and pocket configurations
Filter bags with spacers, leak-proof welded
Front frames made of galvanized sheet steel, aluminum, or plastic
Frame thickness: 25 mm
Reverse-flow bag filter W 45R
The "Reverse-flow" bag filter W 45R (filter classes G4 and M5) is ideal for separating water droplets and salt particles thanks to its drainage properties.
Dimensionally stable support frame construction for extremely high reliability
Allows for installation on the fresh air side in combination with downstream filters when airflow is from outside to inside


W 70X Secondary Separator
Proven in paint finishing technology for over 15 years
Developed in cooperation with paint booth manufacturers specifically for the reliable separation of
overspray from 1K and 2K paint systems.
Suitable for primers, base coats, and clear coats
The W 70X secondary filter is an extremely robust bag filter designed specifically to meet the requirements of paint mist filtration.
The 3-layer, progressively structured high-performance filter media ensures longer filter service life and minimal pressure drop
Technical Specifications
No fiber breakage, as the filter media is made from break-resistant synthetic-organic fibers
The progressive structure of the filter media enables optimal retention of coarse and fine particles, ensuring uniform filter loading
Significantly extended service life due to high paint holding capacity
High operational reliability thanks to welded pockets and integrated spacers
Filter and frame are fully incinerable
Operation up to 5,000 m³/h per filter unit possible
Filter class (F7, EN 779:2012) ISO 16890 ePM10 85%
Paint mist separation up to 5 kg per filter element (depending on the paint type)
Self-extinguishing (F1) according to DIN 53438
Pocket Filters for Your Application
The right solutions for your requirements.




