Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNK 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 GAFR300N15LJNK
The GAFR300N15LJNK is a filter and pressure regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. It handles 1/2in ports and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 40 um filtering element.
This model features a nylon bowl and comes without a gauge, so the 1/8in gauge connection is available if you need to add one. The semi-auto and manual drains are both fitted, and the reverse-flow (reflux) valve is included as an ordering difference. Weighing 500 g, it is a compact unit for its 60 cc condensate capacity.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNK |
|---|---|
| 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 GAFR300N15LJNK
| 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. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFR300N15LJNK Is Used
Low-Pressure Jig
Feed a single pneumatic jig or clamp that operates below 0.4 MPa. The lower-pressure regulator gives fine adjustment in this band, and the 1/2in port suits short runs to the actuator.
Bench Test Rig
Use on a test bench where a stable, low supply pressure is needed for calibration. The balanced regulator holds the setpoint as shop pressure varies, and the 40 um element protects sensitive equipment.
Assembly Station
Mount on an assembly station with a manual drain routine. The 60 cc bowl is sized for a single shift, and the included reverse-flow valve is part of the specified build.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJNK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in port applications that need 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, and the semi-auto plus manual drain requires periodic attention. The lower-pressure type tops out at 0.4 MPa, so confirm your system never needs more. This model omits the bracket and gauge; the 1/8in gauge connection is ready for a field-installed gauge. The 40 um element suits general shop air, and the PT thread is standard. If you need oil downstream, order the 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 top.
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 GAFR300N15LJNK FAQ
It is a filter & regulator with a 1/2in 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). The temperature range is -5 to 70 C. It has a 60 cc drain bowl and weighs 500 g.
The 'N' after the port code means no gauge is supplied, leaving a 1/8in connection for a field-installed gauge. The 'J' means the mounting bracket is omitted, so you must use an existing bracket or panel mount. This reduces the initial cost if you already have these components.
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