Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNW 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 5 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 grade5 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNW
The GAFR300N15LJNW is a filter & regulator from AirTAC, combining both functions in a single body to save space and reduce potential leak points. It handles a 1/2in port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi), with a 5 um element for finer filtration.
This unit features a nylon bowl and comes without a gauge or mounting bracket, making it a compact choice for tight installations. The semi-auto and manual drains are both fitted, and at 500 g it is a lightweight option for its size class, with the flow curve plotted to 3500 L/min at 0.7 MPa inlet.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNW |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 5 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 GAFR300N15LJNW
| 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. |
| W | Filtering grade 5 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 GAFR300N15LJNW Is Used
Precision Valve Control
Feed a bank of precision pneumatic valves that need clean, regulated air at a steady lower pressure, with the 5 um element protecting sensitive internals from fine particulates.
Test Bench Supply
Use on a test bench where a compact, bracketless unit supplies a consistent 0.15-0.4 MPa to calibration fixtures, with the nylon bowl resisting corrosion in a dry workshop.
Single Actuator Feed
Mount directly to a small machine frame to power a single 1/2in actuator, relying on the semi-auto drain for periodic manual checks and the lightweight 500 g body for easy integration.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNW the Right Air-Prep Unit?
Choose the GAFR300 body for a balance of flow and footprint, with a 1/2in port that suits medium-sized actuators or small machine headers. The nylon bowl offers a lightweight alternative to metal, while the 5 um element captures finer particles than the standard 40 um, ideal for sensitive pneumatic controls. The lower pressure type (L) tops out at 0.4 MPa, so confirm your system never needs more than that. This model omits the bracket (J) and gauge (N), so plan for panel mounting and add a gauge via the 1/8in connection if readout is needed. The semi-auto and manual drains are both fitted, and the PT thread is standard. If oil is required downstream, order the matching GAFC300-15 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa regulated ceiling, which is ample for stable operation.
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 GAFR300N15LJNW FAQ
This filter & regulator has 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. The port is 1/2in, the element is 5 um, and it uses a PT thread.
The 'N' after the port code means no gauge is supplied, leaving a 1/8in connection for adding one if needed. The 'J' means the mounting bracket is omitted, which suits panel-mount installations or existing brackets. This reduces the unit's footprint and cost for applications where these accessories are not required.
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