Airtac GAFR Adjustable Filter Regulator GAFR300N08ALN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ALN 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 materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALN
The GAFR300N08ALN is a genuine AirTAC filter & regulator with both functions housed in a single body, so it replaces a separate filter and regulator with one compact unit and fewer potential leak points. This model offers a 1/4in port, a 0.15-0.4 MPa (20-58 psi) lower-pressure range, and a 40 um element, with the nylon bowl and automatic drain as key build features.
The unit's diversion structure spins incoming air to separate liquid water and solid particles into the 60 cc condensate bowl, while the balanced regulator holds the set outlet pressure steady as supply varies. At 500 g, this GAFR300 is a compact size class that suits panel mounting or direct line installation without needing heavy structural support.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ALN |
|---|---|
| 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 | Nylon |
| 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 GAFR300N08ALN
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. 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 GAFR300N08ALN Is Used
Precision Fixtures
Feed a single precision clamping fixture or a small positioning table where a stable 0.15-0.4 MPa supply protects delicate workholding from pressure spikes.
Lab Air Lines
Supply instrument air to a laboratory bench or test rig that needs filtered, regulated pressure in the lower band without risking over-pressure to sensitive equipment.
Maintenance Stations
Mount at a maintenance workbench to provide clean, regulated air for blow-off guns or small pneumatic tools where the automatic drain reduces daily upkeep.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALN the Right Air-Prep Unit?
Choose the GAFR300 body for 1/4in to 1/2in port applications, with the 3500 L/min flow envelope (plotted at 0.7 MPa inlet) as a sizing reference. The nylon bowl offers an alternative to PC or metal construction, while the automatic drain handles condensate without manual intervention - ideal for wet or unattended lines. This L-type unit tops out at 0.4 MPa, so verify your system never needs more than that regulated output. The mounting bracket is included, no gauge is fitted (the 1/8in gauge connection is ready if you add one later), and the PT thread suits standard applications. If the line needs lubrication downstream, order the matching GAFC300-08 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the regulated 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 GAFR300N08ALN FAQ
This 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, -5 to 70 C temperature range, 40 um element, 60 cc drain bowl, and 500 g weight. It has an automatic drain, nylon bowl, no gauge, and the mounting bracket is included.
The L code means lower-pressure regulation (0.15-0.4 MPa instead of the standard 0.15-0.9 MPa), suited for applications that never need higher output. The N after the port code means no gauge is supplied; the 1/8in gauge connection is present if you want to add one later. This configuration suits fixed low-pressure setups where operators don't need to read an integrated gauge.
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