Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJN 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 GAFR300N08ALJN
The GAFR300N08ALJN is a genuine AirTAC filter and regulator combined in a single body, saving rail space and reducing potential leak points versus separate units. This model uses a 1/4in port, a nylon bowl, and an automatic drain, with a lower-pressure range of 0.15-0.4 MPa (20-58 psi) and a 40 um filtering element.
The integrated diversion structure spins incoming air to separate liquid water and solid particles into the 60 cc drain bowl, while the balanced regulator maintains a steady outlet pressure. This unit does not include a lubricator or gauge; the 1/8in gauge connection is available if you need to add one later.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJN |
|---|---|
| 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 | Not included (J) |
| 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 GAFR300N08ALJN
| 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). |
| J | No bracket (J) — supplied without the mounting bracket. |
| 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 GAFR300N08ALJN Is Used
Precision Fixture
Feed a single pneumatic fixture or clamping cylinder that needs a stable, lower pressure setting. The 40 um filter protects sensitive components, and the automatic drain keeps the bowl clear during long production runs.
Test Bench Air Supply
Use on a test bench where a regulated 0.15-0.4 MPa supply is required for calibration or leak testing. The compact 500 g body with a 1/4in port fits easily into a panel-mounted setup.
Dedicated Machine Station
Mount this unit on a specific machine station that operates at lower pressures. The nylon bowl and automatic drain make it suitable for environments where condensate management is a priority.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJN the Right Air-Prep Unit?
Choose the GAFR300N08ALJN when you need a compact filter-regulator with a 1/4in port and a lower pressure ceiling of 0.4 MPa. The nylon bowl offers an alternative build to the standard PC, and the automatic drain suits unattended operation. This version omits the mounting bracket and gauge, so plan for panel mounting and consider adding a gauge via the 1/8in connection. If your line requires 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 regulated top, which is useful for consistent performance.
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 GAFR300N08ALJN FAQ
The GAFR300N08ALJN is a filter & regulator with a 1/4in port, a pressure range of 0.15-0.4 MPa (20-58 psi), a max pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C, has a 60 cc drain bowl, and weighs 500 g. It features a 40 um element, an automatic drain, and a nylon bowl.
The 'J' code means the mounting bracket is omitted, which is ideal for installations using an existing bracket or a direct panel mount. The 'N' after the port code indicates no gauge is supplied; the 1/8in gauge connection is present if you need to add one. This allows for a more compact and cost-effective configuration when those accessories are not required.
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