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 p ice book.)

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

0.12µm 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 p essu e and chal- lenge aerosol measurements can be taken from a separate room side port. Standa d construction allows the modules to be op rat d 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 he 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 se ure the flex duct retain- ing strap. A 20 ga. expanded steel white powder- coated face grille prote ts the media pack. Each module is sc n-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

Me ia: 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 a ter assembly to meet or exceed IEST RP-1 requirements or Type C and F filters

Mini-pleat separatorless filter pack for a lightweight and low profile design

Choice of thr e 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

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Honeywell 11255 manual Pureflo, Installation and Application Considerations, Options

11255 specifications

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