Round Paintstop Filter Box for Extract Ventilation

A round paintstop filter box (exhaust air filtration housing series VENBKP) is a highly specialized extraction refinement component engineered explicitly for automotive body shops, paint spray booths, carpentry workshops, and industrial coating lines. Positioned directly inside exhaust duct runs, this filter unit handles the critical challenge of removing wet overspray, airborne lacquer particles, and dry chemical mist generated during spraying applications. Integrating this specialized containment node completely shields downstream exhaust tracks from rapid clogging, protecting inline fan impellers from heavy paint accumulation, maintaining balanced fan wheel dynamics, and minimizing the release of hazardous particulate emissions into the outdoor atmosphere.

The rigid rectangular housing is manufactured on automated production lines from high-grade structural hot-dip galvanized sheet steel, grade DX51D, featuring a heavy protective zinc passivation layer of Z275 (275 g/m²). The interior of the chamber houses a replaceable, high-elasticity glass fiber exhaust mat built with a progressive density matrix. This robust combination of industrial-grade materials ensures outstanding casing structural integrity under high-velocity extraction pressures, guards the housing shell against aggressive chemical solvents, and guarantees long-term durability in punishing technological environments.

Key Benefits of the Paintstop Filter Box

• High overspray retention to minimize duct fire hazards: The specialized G3-class glass fiber PAINTSTOP media features an open-weave, high-loft structure optimized for maximum paint holding capacity, trapping up to 90% of airborne liquid particles. This completely stops wet coatings from baking onto internal duct walls, reducing system fire risks and extending duct cleaning cycles.
• Outstanding thermal stability for high-heat curing processes: The fiberglass filtration element safely handles continuous operating temperatures reaching up to 180°C. This allows mechanical contractors to mount the box directly adjacent to flash-off zones or integrate it straight into high-temperature exhaust ducts serving industrial drying lines without any risk of media degradation.
• Tool-free access cover for rapid exhaust servicing: The top-access inspection panel is secured tightly using ergonomic threaded wing nuts, ensuring absolute airtight integrity even under severe static negative pressure. Maintenance crews can easily inspect or replace heavily soiled mats by hand in seconds, completely eliminating the need for screwdrivers or wrenches.
• Airtight inline coupling without liquid mastics: The circular connection ports feature a calibrated male nipple profile equipped with factory-pressed double-lipped EPDM rubber gaskets. These elastic seals form a tight compression fit inside round pipes, reducing ambient air bypass and discarding the need for liquid sealants or duct tapes.

Technical Specifications and Dimensional Data

The structural dimensions, installation clearances, and nominal port calibrations of the VENBKP series fully align with European ventilation standards EN 1505:2000 and EN 1506:2007. The interior track configuration is explicitly sized to accommodate standard commercial glass fiber media rolls and cut mats.

• Casing Structural Material: DX51D structural hot-dip galvanized steel (Z275 zinc mass coating)
• Metal Thickness Profile: 0.5 mm to 1.0 mm scaled relative to nominal casing dimensions
• Casing Operating Temperature Range: Stable performance from -40°C up to +70°C (Filter media heat limits up to 180°C)
• Recommended Media Replacement Threshold: Exhaust mat swap-out is advised upon reaching a final differential pressure drop between 250 and 450 Pa
• Connection Interface Configuration: Double male nipple profile with factory-pressed EPDM gaskets

Assembly and Exhaust Track Placement Guidelines

The PAINTSTOP filter box must be integrated into the extract section of the air track, positioned upstream of the extraction fan unit relative to the airflow path. Slide the male connection collars directly into straight round ducts until they hit the pre-rolled physical stop beads, then mechanically lock the overlapping joint using blind rivets or self-tapping sheet metal screws. When mapping out the extraction layout, verify that ample clear space is preserved on the side of the removable cover to ensure unhindered extraction of the dirty fiberglass mats. Wrap all outer joint lines with high-adhesion aluminum tape to safeguard compliance with design system airtightness metrics.