Champion CFL Series Inline Air Filter – Grade B General Purpose Separator/Filter, 3 Micron (20–780 SCFM)

The Champion CFL Series Grade B is a combination separator and general purpose filter available in ten flow rates from 20 to 780 SCFM. A single Grade B housing does two jobs at once: it separates bulk liquid out of the air stream and then filters what is left down to 3 micron with a residual oil carryover of 5 ppm. Rated to 300 PSIG, it is the one-filter answer for shops that want real protection on a general-purpose air system without stacking two separate housings.

Select your flow rate and connection size from the dropdown above.

Two Stages in One Housing

Air entering a Grade B first hits a separation section that throws out condensate slugs and heavy droplets, then passes through a pleated depth element that captures solid particles and coalesces the remaining oil aerosol. That two-stage arrangement is why the Grade B lasts so much longer than a bare coalescing element installed on wet air, and why it is the standard choice ahead of pneumatic tools, cylinders, and regulators in general plant service. Where you need instrument-quality air, follow it with a Grade E high-efficiency coalescing filter.

ISO 8573-1:2010 Air Quality Performance

• Particle Removal — 3 micron, covering the solids that damage tool vanes, seals, and orifices.
• Remaining Oil Content — 5 ppm by weight, suitable for general industrial and shop air service.
• Liquid Removal — Integral separation section removes bulk condensate before it reaches the element.

Model Selection Chart

Models 20 through 60 ship with an internal automatic drain and a differential pressure slide indicator. Models 100 and 170 ship with an internal automatic drain and a differential pressure gauge. Models 250 through 780 ship with a gauge and a manual or plugged drain port; an internal automatic drain or an electronic demand drain can be substituted at order entry. BSP threads, alternate connection sizes, a liquid level indicator, and a 304 stainless element are all available. Call us and we will configure the part number.

Key Features at a Glance

• Separator Plus Filter in One Housing — Bulk liquid separation and 3 micron filtration without two pieces of pipe work.
• 3 Micron / 5 PPM Performance — The right specification for general plant air, tools, and cylinders.
• 20 to 780 SCFM Rated Flow — Ten sizes from a small shop compressor to a large plant header.
• 300 PSIG Maximum Working Pressure — 250 PSIG when supplied with the internal automatic drain or liquid level indicator.
• 150°F Maximum Inlet Temperature — Takes hot air straight off the aftercooler.
• Differential Pressure Indicator — Slide or gauge, so element changes happen when they are needed rather than on a guess.
• Heavy-Duty Cast Aluminum Housing — Corrosion resistant and factory pressure tested.
• Field-Replaceable Element — The housing stays in service for decades; only the cartridge is consumable.

Shared Technical Specifications

Ideal Applications

The Grade B suits general industrial plant air, pneumatic tool and cylinder supply, automotive service bays, woodworking and fabrication shops, packaging lines, and any point-of-use drop where a single filter has to handle both liquid and particulate. It is a strong pre-filter ahead of a refrigerated dryer on systems that run wet, because the separation section keeps condensate out of the dryer heat exchanger.

Build Your Filtration Train

For a complete compressed-air treatment system: (1) CFL Grade A mechanical separator or a Grade B at the compressor discharge; (2) refrigerated or desiccant dryer; (3) CFL Grade E coalescing filter downstream of the dryer; (4) CFL Grade G carbon filter where oil vapor and odor must go too.

Element Replacement and Service

Replace the element annually, or whenever the differential pressure indicator shows a 5 PSID rise across the filter, whichever comes first. Running a clogged element wastes energy at roughly 1% of compressor horsepower per PSID of pressure drop and eventually risks element rupture. Genuine Champion CF-series Grade B elements are listed in the chart above.