Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN 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 1/2" 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 size1/2"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN
The GAFR300N15LJN is a filter and pressure regulator combined into a single body, eliminating the need for separate GAF and GAR units. It handles a 1/2in port with a lower pressure range of 0.15-0.4 MPa (20-58 psi) and uses a 40 um element to trap solids.
This 500 g unit features a nylon bowl and a semi-auto plus manual drain, with no gauge supplied. Its diversion structure spins incoming air to separate liquid water and solid particles into the 60 cc condensate bowl, keeping the regulated output clean.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Nylon |
| Drain type | Semi-auto drain + manual 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 GAFR300N15LJN
| 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). |
| 15 | Port size 1/2". This body offers 08 = 1/4", 10 = 3/8", 15 = 1/2". |
| (blank) | Drain: Semi-auto drain + manual 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 GAFC300-15 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 · 1/2" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN Is Used
Precision valve control
Feed a precision pneumatic valve that requires a stable, low-pressure supply below 0.4 MPa. The balanced regulator holds the set pressure as line pressure varies, protecting sensitive actuators.
Test bench setup
Use on a lab test bench where a clean, regulated air supply at low pressure is needed for calibration rigs. The 40 um element filters particulates, and the 60 cc bowl handles typical condensate between checks.
Single station machine
Mount on a single-station assembly machine that runs at low pressure. The 500 g body with a 1/2in port fits compact frames, while the semi-auto drain allows scheduled maintenance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in port applications needing a 60 cc drain bowl and a flow envelope plotted to 3500 L/min at 0.7 MPa inlet. The nylon bowl suits environments where a lighter, non-metallic build is preferred, while the lower pressure type caps output at 0.4 MPa, so verify your system never needs more. This model ships without a bracket (J) and without a gauge (N); the 1/8in gauge connection is ready if you add one later. The semi-auto drain requires manual intervention, unlike an A model. If oil is needed downstream, order the GAFC300-15 combination instead. 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 (1/2" 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 GAFC300-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJN FAQ
The GAFR300N15LJN operates at 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 60 cc drain bowl and weighs 500 g, with a 1/8in gauge connection.
The L type limits output to 0.4 MPa for applications that never need higher pressure, offering finer adjustment within that band. The J code omits the mounting bracket, so you can use an existing panel mount or frame; the unit must be supported by structure, not tubing.
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