Honeywell 11255 Application Considerations, Residence Time, Carbon Type and Typical Applica ions

Application Considerations

Superflow-VC Adsorbers in HVAC airstreams can remove many gaseous contaminants thus mitigat- ing their effects on people and processes. They are especially useful in controlling common contami- nants that cause poor indoor air quality (IAQ) in commercial and industrial buildings such as office buildings and hospitals.Typical applications and controlled contaminants are:

Airports	SOx and NOx
Blueprint facilities	Ammonia
Food processing	Amines
Loading docks	Diesel fumes
Museums	Aldehydes and acid gases
Office buildings	VOCs and aldehydes
Research facilities	Animal odors

Light duty IAQ applications can usually be handled by Superflow-VC units selected at 500 fpm (2.54 m/s) face velocity with a 0.030 second residence time. Medium and heavy duty applications include airports, engine exhaust, some industrial processes and situations requiring impregnated carbon. For these applications, adsorbers should be selected at greatly reduced face velocities for a longer resi- dence time.

Residence Time

Residence time is the period, usually a fraction of a second, that the contaminant molecule is within the boundaries of the media bed depth and is exposed to adsorption capture and (for chemisorption) chemical change. The efficiency of an dsorber is function of the bed residence time for a given con- taminant and set of environmental conditions. The longer the residence time, the g eater the efficien- cy. Residence time is comput d as: (bed area exposed to airflow x bed d pth) airflow rate.

Installation

Superflow-VC Adsorbers are not position sensitive. Airflow may be through the header side face or the opposite side ace. The cell may be turned so that the panels are vertical or horizontal. Wherever pos- sible, adsorbers should be installed with panels ver- tical and air entering the header side face.

Frames and housings used for 12” (305 mm) deep particulate filt rs are well-suited for Superflow-VC adsorbers. In new construction, built up banks of Flanders Type 9 Holding Frames and Clips or

Flanders K-Trac Framing Modules holding prefilters and adsorbers are often chosen where 30 inches (760 mm) of upstream service access space is available. Flanders Sureseal Side Access Housings are most often used for small systems and for sys- tems where in-line service access space is limit d.

Type 9 Holding Frames include gaskets on the flange against which the adsorber header seals. For side access housing applications, gaskets are applied to the side of the ads rber header to achieve an adsorber-to-adsorber and ads rber-to- door seals.

Carbon Type and Typical Applica ions

(Weights are per 24 x 24 ad orber)

TS 201- Virgin coconut shell- VOC (volatile organic compounds) Carbon weight = 25 lb/11.4 kg

TS 202- Impregnated for ontrol of acid and malodor- ous gas bsorption C rbon weight = 29 lb/13.1 kg

TS 204- Impregn ted for control of ammonia and light organic mines dsorption Carbon weight = 28 lb/12.6 kg

TS 205- Impregnated for control of aldehydes Carbon weig t = 29 lb/13.1 kg

TS 209- Impregnated for universal adsorption of both acid and alkaline gases and vapors Carbon weight= 32 lb/14.9 kg

Refer to Superflow-VC Drawing for construction etails.

Model Number Development

SFVC	TS201	242412
Superflow	Carbon	Nominal
VC	Type	Size

SFVC-TS201-242412

Represents a Superflow VC Carbon

Adsorber with Type 201 carbon, nominal 24” x 24” x 12” (610 mm x 610 mm x 305 mm) with polyfoam gasket material shipped loose.

Flanders - Foremost in Air Filtration

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