Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ 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 gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ
The GAFR300N15LJ is a filter and regulator combined into a single body, so it cleans incoming air and holds a steady outlet pressure without needing a separate filter plus regulator pair. This unit has a 1/2in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a 40 um element. Its nylon bowl and 60 cc condensate capacity make it a compact service point for a pneumatic line.
Because the regulator is balanced and the knob is self-locking, the set pressure resists drifting when the machine vibrates. The diversion structure spins the air to drop liquid water and solid particles into the bowl before regulation. This model ships with both semi-auto and manual drains, and it has no bracket, so plan for a panel mount or an existing support.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ |
|---|---|
| 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ
| 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. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR300N15LJ Is Used
Precision valve actuation
Feed a single precision pneumatic valve or a small indexing fixture that needs a clean, regulated air supply at a modest pressure. The 1/2in port and 40 um element suit a dedicated low-pressure station.
Bench test rig
Use it on a laboratory or workshop bench where a lower regulated pressure is required for testing components. The nylon bowl and manual drain give a clear view of condensate for periodic service.
Light assembly line
Mount it on a light assembly line to supply a single workcell or a small pneumatic hand tool. The self-locking knob keeps the setpoint stable despite nearby machine vibration.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJ the Right Air-Prep Unit?
Choose the GAFR300 body for a 1/2in port with a 60 cc drain bowl and a flow curve plotted to 3500 L/min at 0.7 MPa inlet. The nylon bowl is a build choice for the environment, and the 40 um element is the standard grade. This L-type unit tops out at 0.4 MPa, so if the machine may ever need more pressure, select the standard S type instead. The semi-auto and manual drains are both fitted here, and the J code means no bracket is included. The fitted circular gauge reads in MPa/psi because the thread is PT. If oil is needed downstream, order the matching GAFC300-15 combination rather than this unit. A 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 GAFR300N15LJ FAQ
The GAFR300N15LJ is a filter and regulator with a 1/2in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 60 cc, the unit weighs 500 g, and the flow curve is plotted to 3500 L/min at 0.7 MPa inlet.
The L indicates a lower-pressure regulator type, with a working range of 0.15-0.4 MPa (20-58 psi) instead of the standard 0.15-0.9 MPa. This makes it suitable for applications that only need a low regulated pressure, but it is the wrong choice if the machine may require more than 0.4 MPa.
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