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Completion of the following preparations and provision of the
following items will be the responsibility of the installer or others:
• Site preparation
• Connecting hardware for attaching inlet and outlet ducts
• Caulk, as required
• Inlet and outlet ducts, or other sheet metal parts, as required
These items will not be supplied by AAF unless noted specifically in
the AAF quotation and in the accepted customer purchase order.
In general, assembly of the filter system will consist of the following:
• Preparation of the installation location
• Transportation of all components to the installation location
• Unpacking the PORTA-Scrubber
• Installing the PORTA-Scrubber
• Installing inlet and outlet ducts
• Unpacking particulate filters
• Installing particulate filters
• Unpacking chemical media
• Installing chemical media
• Cleaning the site
• Start-up and commissioning of the filter system
1.7 Related System Equipment
Ventilation systems can include other equipment including but not
limited to:
• Fan(s), if not supplied as part of the PORTA-Scrubber
• Dampers
• Analog instrumentation
• Electronic instrumentation and controls
Neither the interface of these items with the filtration system supplied
by AAF, nor the installation, operation, and maintenance of these
items is covered in this manual. Whether these items are supplied by
AAF or by others, consult the documentation specific to these
products for appropriate instructions.
2.0 Principles of Operation
An understanding of the design and operating principle of the
PORTA-Scrubber with chemical media is useful for effective
installation, operation, and maintenance. The system is intended to
remove corrosive and odorous gaseous contaminants from sewage
pumping stations, laboratory vent hoods, and pressure relief valves
of chemical storage tanks.
WARNING: Chemical tank on other high concentration applications
may require constant airflow and other special operating instructions.
Ensure that the design operating instructions are followed.
The heart of the system is the SAAF chemical media. The PORTA-
Scrubber is a small high density polyethylene (HDPE) vessel that
allows air to move across the chemical media bed in an upward
direction. The method of contaminated removal is through physical
adsorption or a combination of physical adsorption and chemical
reactions, such as oxidation. AAF offers a variety of impregnated
and un-impregnated dry granular chemical filtration media to handle
a wide range of contamination problems. For more information on
AAF’s gas phase air cleaning products, contact your AAF
representative.
The SAAF PORTA-Scrubber is one of the various systems designed
to support the SAAF chemical media in the air stream and to allow
easy installation, operation, and maintenance of the system.
CAUTION: All dry chemical media has the potential to generate
a small amount of dust in the exhaust. If your scrubber will be
located indoors without external exhausting, you will require
additional particulate filtration on the exhaust. Solutions can range
from an additional PolyKlean Blue pad downstream of the media
bed to a separate filter box.
