Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN is a genuine two-in-one filter & regulator — a diversion-type water/particulate filter and a balanced pressure regulator built into ONE body. It has 1/4" ports, a 40 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN
The GAFR300C08ALN is a filter and regulator combined into a single body, so incoming air is first spun to separate liquid water and solid particles, then regulated to a steady outlet pressure. This unit has no lubricator and only one bowl, the 60 cc metal condensate bowl.
This model uses a 1/4in port and the lower-pressure type, delivering 0.15-0.4 MPa (20-58 psi) with a 40 um element. The metal bowl and automatic drain suit wet or unattended lines, and the 500 g mass means it needs a proper panel or frame mount rather than support from the tubing.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Metal |
| Drain type | Automatic drain |
| Fluid | Air |
|---|---|
| Max. pressure | 1.0 MPa (145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Capacity of drain bowl | 60 cc |
| Bracket | Included |
| Weight | 500 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. No gauge is supplied with this model — the gauge connection on a GAFR300 is 1/8" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 08 | Port size 1/4". This body offers 08 = 1/4", 10 = 3/8", 15 = 1/2". |
| A | Drain: Automatic drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Mounting bracket included. |
| N | No pressure gauge; 1/8" gauge connection. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| (blank) | No reverse-flow valve. |
The filter and the regulator are ONE body here — there is no separate GAF filter or GAR regulator part to assemble. Need lubrication downstream too? Add a lubricator by ordering the matching GAFC300-08 F.R.L. combination instead.
Size Class & Flow Envelope
- GAFR2001/8"-1/4" · 2000 L/min
- GAFR3001/4"-1/2" · 3500 L/min
- GAFR4003/8"-1/2" · 7000 L/min
- GAFR5003/4" · 8000 L/min
- GAFR6003/4"-1" · 12000 L/min
Figures are the end of the flow curve plotted in the AirTAC catalogue at 0.7 MPa inlet pressure — a sizing envelope for comparing bodies, not a rated flow. Read the catalogue curve for a real duty point. Outlet pressure falls as flow rises, so size a body with headroom above your peak demand.
| This model | GAFR300 · 1/4" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-08 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN Is Used
Precision valve actuation
Feed a single precision pneumatic valve or small actuator on a benchtop fixture, where the lower 0.4 MPa ceiling protects delicate components and the automatic drain keeps the line clear.
Wet compressor lines
Mount on a machine header fed by a wet compressor line, where the automatic drain and metal bowl handle frequent condensate without manual checks.
Low-pressure test rigs
Supply a low-pressure test rig or calibration bench that requires a stable 0.15-0.4 MPa output, with the 40 um element protecting sensitive instruments.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN the Right Air-Prep Unit?
Choose the GAFR300 body for 1/4in to 1/2in ports; this 1/4in version sits below the GAFR400 (3/8in-1/2in, 100 cc bowl) and above the GAFR200 (1/8in-1/4in, 25 cc bowl). The metal bowl is a build choice with the same 1.0 MPa max and -5 to 70 C rating as PC or nylon, so confirm compatibility for aggressive surroundings. The automatic drain handles condensate without manual intervention, while the included bracket simplifies mounting. The L type tops out at 0.4 MPa, so if the machine may ever need more pressure, select the standard S type instead. There is no gauge fitted, but the 1/8in gauge connection allows one to be added later. The 40 um element handles general shop air, and the PT thread matches standard local fittings. If oil is needed downstream, order the matching GAFC300-08 combination instead. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (1/4" here)
- ✓ Standard 0.9 MPa or lower-pressure 0.4 MPa
- ✓ Bowl material: PC (blank), Metal (C), Nylon (N)
- ✓ Drain: semi-auto + manual, or automatic
- ✓ Element 40 µm or 5 µm
- ✓ Bracket kept or removed (J); add a lubricator = GAFC
Installation & Maintenance Notes
- check Install with the airflow arrow: IN to OUT, gauge/knob accessible.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure with the pressed-in self-locking knob; pull to adjust, press to lock.
- check Drain condensate before the 60 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 500 g unit on its bracket, not on the tubing.
This is a filter and regulator only — it delivers filtered, pressure-set air with no added oil. If a downstream tool needs lubrication, add a separate lubricator or order the GAFC300-08 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300C08ALN FAQ
The GAFR300C08ALN is a filter & regulator with a 1/4in port, 0.15-0.4 MPa (20-58 psi) working range, 1.0 MPa (145 psi) max pressure, 1.5 MPa (215 psi) proof pressure, and -5 to 70 C temperature range. It has a 60 cc drain bowl, weighs 500 g, uses a 40 um element, and has an automatic drain.
The metal bowl (C) is a build choice for environments where a transparent bowl is not preferred, though it shares the same pressure and temperature ratings as PC or nylon. The N after the port means no gauge is supplied; the 1/8in gauge connection is available if you add one later.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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