Cleanroom Equipment Spare Parts

FFU Pre-Filter

A shallow coarse-media intake panel that captures fibers and large dust before they reach the FFU fan and final HEPA filter.

Low-Resistance Coarse Media
Shallow FFU Profile
Rigid Aluminum Frame
Easy Service Pull Tabs

Request a Quote Browse Products

Product Introduction

The FFU pre-filter installs at the fan intake to intercept lint, fibers and coarse particles before they load the impeller or final filter. A shallow aluminum frame holds synthetic media against an expanded-metal support grid, preserving open area under fan suction. Service tabs allow the panel to be removed from a restricted ceiling plenum without disturbing the HEPA filter. Face dimensions, thickness, media grade and airflow direction must match the FFU intake rack.

Key Features

Open synthetic media adds limited resistance at normal FFU face velocity.

A rigid shallow frame remains square in the intake track during repeated service.

Expanded-metal support prevents media movement toward the rotating fan.

Pull tabs provide a defined grip point for overhead removal and replacement.

Customer Product Concerns

An FFU intake filter must protect the fan without consuming the pressure reserve needed by the final filter.

Coarse debris accumulates on the impeller and changes fan balance.The upstream synthetic layer captures fibers and large particles before they enter the wheel.

A restrictive prefilter reduces airflow through the cleanroom HEPA filter.A shallow, open coarse-media structure preserves a broad effective flow area.

Unsupported media bows inward under fan suction.An expanded-metal grid stabilizes the media across the full panel face.

Flush panels are difficult to remove in a shallow ceiling plenum.Flexible pull tabs provide accessible service grips without adding significant depth.

Typical Applications

Cleanroom fan filter unit intakesLaminar-flow module prefiltrationMini-environment circulation unitsFFU fan and HEPA protection

Technical Parameters

Typical construction ranges for FFU intake pre-filters are shown below.

Core Material	Bonded polyester or washable synthetic coarse-filter media with expanded-metal support
Panel Thickness	10-30 mm nominal filter depth
Effective Width	300-610 mm nominal face width
Maximum Length	Up to 1220 mm nominal face length
Steel Facing Thickness	0.4-0.8 mm optional galvanized expanded-metal support grid
Core Density	Approximately 20-45 kg/m³ nominal synthetic-media bulk density
Thermal Conductivity	Approximately 0.035-0.045 W/(m·K) for dry polyester media
Surface Finish	Natural silver aluminum frame with clean white synthetic media and pull tabs
Joint Type	Media retained in a mitered shallow frame with bonded or mechanically fixed support grid
Customization	Available based on the intended application and operating environment.

Available Options

Disposable or washable mediaCustom FFU face dimensionsUpstream or downstream support gridPull-tab location and quantity

Planning a FFU Pre-Filter specification?

Send us your dimensions, installation conditions, performance targets and required surface finish.

Talk to Our Team