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Cleanroom Utility Systems
Activated Carbon Exhaust Unit
Horizontal in-duct molecular filtration cabinet with particulate prefilter, sealed activated-carbon cartridge bank, side-access doors and differential-pressure connections for selected VOC and odor control.
- Modular activated-carbon cartridge bank for exhaust air
- Upstream particulate prefilter protects adsorption media
- Gasketed side access simplifies inspection and changeout
Product Introduction
The Activated Carbon Exhaust Unit is a horizontal duct module for reducing selected VOCs, odors and compatible molecular contaminants in process or room exhaust. Air enters through a tapered transition, crosses a particulate prefilter and then passes through a sealed bank of activated-carbon cartridges before leaving through the opposite transition. The side-access cabinet keeps each cartridge positively located on a gasketed baseplate, while door seals and handwheel latches limit bypass. Differential-pressure taps indicate particle-filter loading and abnormal flow resistance, but carbon replacement is established from contaminant loading, media testing or downstream monitoring. Carbon grade, impregnation, residence time, humidity limit and fire controls are matched to the actual exhaust stream.
Key Features
A particulate prefilter reduces dust loading that would otherwise mask the activated-carbon surface
Gasketed cylindrical cartridges provide a modular molecular-media bank across one nominal duct module
Gasketed cartridge bases direct airflow through the media rather than around the cylinders
Large side-access doors allow cartridge inspection and replacement without dismantling adjacent ductwork
Multiple handwheel latches compress the closed-cell door gasket evenly around the service opening
Tapered inlet and outlet transitions spread and recover airflow across the filter face
Pressure taps support separate observation of prefilter and total housing resistance
Galvanized or stainless construction can be selected for the surrounding exhaust environment
Standard or impregnated activated carbon can target different compatible VOC, odor or corrosive-gas challenges
Customer Product Concerns
Activated carbon is a finite-capacity adsorbent. Reliable service requires contaminant-specific media, adequate contact time, clean airflow distribution and a replacement method that does not rely solely on pressure drop.
Standard carbon may have poor capacity for a polar, acidic or alkaline contaminantIdentify the complete gas mixture and select virgin or chemically impregnated media from adsorption and reaction data for that duty.
High humidity can occupy adsorption sites or reduce capacity for the target vaporControl condensation, record temperature and humidity, and select a media grade evaluated for the expected operating range.
Air leaking around cartridges or the access door bypasses the carbon bedUse positive cartridge seating, intact base gaskets and evenly compressed door seals, then verify the installed housing for leakage.
Carbon can become saturated while the pressure gauge remains nearly unchangedSet replacement from a validated loading estimate, periodic media-life analysis or compatible downstream gas monitoring.
Dust can blind the cartridge surface and raise energy use before adsorption capacity is consumedInstall the correct upstream prefilter, monitor its pressure drop separately and replace it before dust migrates into the carbon stage.
Hot spots or incompatible reactive vapors can create a fire or desorption hazardScreen the exhaust chemistry and temperature, avoid unsuitable oxidants, and provide the required fire detection, isolation and safe changeout controls.
Typical Applications
Laboratory and pharmaceutical room exhaust containing characterized solvent vapors or odorsElectronics, printing and coating process exhaust with low-concentration compatible VOC loadsClean-manufacturing recirculation or exhaust systems requiring molecular-contaminant controlWastewater, chemical storage and utility areas needing odor polishing after source controlExhaust-air polishing downstream of particulate removal where carbon adsorption is appropriate
Technical Parameters
The displayed basis is a horizontal galvanized-steel housing approximately 1400 mm long, 760 mm wide and 760 mm high, using a modular bank of cylindrical activated-carbon cartridges and one upstream pleated prefilter. The site's fixed ten-row schema uses panel-oriented labels; Panel Thickness therefore represents housing width across the service doors, while Core Density and Thermal Conductivity describe representative packed molecular media. Cartridge quantity, carbon type, bed mass, residence time, duct velocity, seals, prefilter and monitoring remain application-selected.
| Core Material | Galvanized or optional AISI 304 housing with pleated prefilter and a modular bank of gasketed cylindrical activated-carbon cartridges |
|---|---|
| Panel Thickness | 760 mm representative housing width across the side-access door and cartridge bank |
| Effective Width | 760 mm representative module height including support feet and differential-pressure fascia |
| Maximum Length | 1400 mm representative overall length including tapered inlet and outlet transitions |
| Steel Facing Thickness | 1.2 mm nominal galvanized cabinet skin with locally reinforced door, flange and cartridge-support sections |
| Core Density | 700-900 kg/m³ representative packed apparent density for a mineral and activated-carbon composite molecular medium |
| Thermal Conductivity | Approximately 0.15 W/(m·K) conservative reference value for a porous packed carbon bed |
| Surface Finish | Light-gray galvanized or powder-coated exterior, black molecular cartridges, white prefilter and closed-cell door seals |
| Joint Type | Bolted duct flanges with gasketed access doors, handwheel compression latches and bayonet-seated cartridge bases |
| Customization | Available based on the intended application and operating environment. |
Available Options
Virgin, pelletized or granular activated carbon selected for compatible broad-spectrum VOC dutyImpregnated carbon or blended molecular media for characterized acid, base or sulfur compoundsCylindrical cartridge, V-cell or panel-filter media arrangementGalvanized, powder-coated or AISI 304 stainless housingCoarse, medium or high-efficiency particulate prefilter stageSeparate prefilter and carbon-stage differential-pressure connectionsDownstream gas sampling port and media-life monitoring provisionSingle or multiple modular banks for the required airflow and contact timeFire damper, temperature sensor and isolation interfaces where required by the exhaust risk review
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