Honeywell 11255 - Manual (Page 97)

97
General
Flanders Pureflo Terminal HEPA/ULPA Filter
Modules are lightweight low profile ducted units.
The mini-pleat filter packs are designed to provide
unidirectional airflow from tee-bar ceilings. Pureflo
modules are available in two sizes: nominal 24” x
24” and 24” x 48” with either 10” or 12” diameter
inlet collars. They are available in two particle size
efficiencies: 99.99% on .0.30 µm and 99.9995% on
0.12 µm and in three filter pack depths: 53, 70 and
100 mm
Installation and Application
Considerations
Pureflo Terminal HEPA/ULPA Filter Modules are
recommended for use in ultraclean applications.
They are ideal for fabrication of microelectronics,
semiconductors, and medical devices; and in aero-
space, biotech and pharmaceutical production.
Selection of the PF70 or PF100 models will help
reduce operating costs because of their lower
resistance and longer service life.
Clips on the module’s top four corners are to be
used to secure seismic restraint wires. Polyfoam
gasket should be applied to the tee-bar surface on
which the module will rest.
The standard face velocity range of 70 to 110 fpm
is easily adjusted from the room side by a screw-
driver operated damper. Static pressure and chal-
lenge aerosol measurements can be taken from a
separate room side port. Standard construction
allows the modules to be operated at a pressure
drop of 2.0 inches w.g.
Construction
The heart of the Pureflo module is a state-of-the-
art minipleat filter pack sealed in an anodized
extruded aluminum casing forming the sides of the
module. The extruded aluminum center divider
holds ports for in-room damper adjustment and
measurement of the challenge aerosol. The one
piece hood/inlet collar is made of aluminum and the
inlet collar is dimpled to secure the flex duct retain-
ing strap. A 20 ga. expanded steel white powder-
coated face grille protects the media pack. Each
module is scan-tested after assembly to meet or
exceed IEST RP-1 requirements for a Type C or F
filter.
Options
Pureflo Modules are available with either nominal
10” or 12” diameter inlet collars. One inch thick
vinyl-backed fiberglass insulation on the top and
sides of the module is also available.
Physical Data
Media: Water-resistant micro-fine fiberglass
Filter Construction: Separatorless minipleat
Sealant: Polyurethane
Filter Frame: Clearcoat-anodized extruded alu-
minum
Top: One-piece aluminum with dimpled inlet collar
Damper: Perforated aluminum, 14 ga.
Protective Grille: White powdercoat 20 ga. steel
Center Divider: Extruded aluminum rectangular
tube
Important Features
• Scan-tested after assembly to meet or exceed IEST
RP-1 requirements for Type C and F filters
• Mini-pleat separatorless filter pack for a lightweight
and low profile design
• Choice of three filter pack depths: 53, 70 and 100 mm
(2.10, 2.76, and 3.96 inches)
• In-room air flow damper adjustment and challenge
aerosol ports
• One-piece aluminum hood/inlet collar
Pureflo
Terminal HEPA/ULPA Filter Modules
99.99% on .3 microns: Models: PF†-493-xxxx-*
99.9995% on .12 microns, Models: PF†591-xxxx-*
(Where † is pack depth designator and • is collar diameter. See price book.)
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