Airtac GAFR Adjustable Filter Regulator GAFR300N15LJWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15LJWK 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 gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJWK
The GAFR300N15LJWK is a filter & regulator in a single body, combining a diversion-type filter with a balanced pressure regulator. 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. The nylon bowl holds 60 cc of condensate, and the unit weighs 500 g.
This model includes a circular gauge with MPa/psi scale, a reverse-flow (reflux) valve, and a semi-auto plus manual drain. It comes without a mounting bracket, so plan for panel mounting or an existing bracket. The pressed-in self-locking knob resists set-pressure drift from vibration, keeping the outlet steady as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR300N15LJWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15LJWK |
|---|---|
| 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. 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 GAFR300N15LJWK
| 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. |
| W | Filtering grade 5 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 GAFR300N15LJWK Is Used
Precision pressure setting
Use the lower 0.15-0.4 MPa range to set a stable low pressure for a sensitive pneumatic sensor or a light clamping fixture, where the 5 um element protects fine orifices.
Bench test rig
Mount this 500 g unit on a test bench to supply a clean, regulated 1/2in air feed to a prototype valve or actuator, with the gauge giving a direct MPa/psi readout.
Low-pressure conveyor control
Feed a short conveyor section or a single positioning cylinder that must not exceed 0.4 MPa, using the semi-auto drain to clear the 60 cc bowl during shift checks.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15LJWK the Right Air-Prep Unit?
Choose this GAFR300 when you need a 1/2in port with a lower pressure ceiling of 0.4 MPa (20-58 psi) for sensitive applications. The nylon bowl offers a build alternative to PC or metal, and the 5 um element traps finer particles than the standard 40 um, though it will need more frequent service. The semi-auto plus manual drain lets you empty the 60 cc bowl on a schedule, while the included gauge shows MPa/psi. The J code means no bracket is supplied, and the K code adds a reverse-flow valve as an ordering difference. If you need lubrication downstream, order the matching GAFC300-15 combination instead. Note that 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so verify your inlet pressure stays near 1.0 MPa for full adjustment.
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 GAFR300N15LJWK FAQ
This filter & regulator has 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 nylon drain bowl holds 60 cc, the unit weighs 500 g, and the 5 um element is fitted. It includes a gauge with MPa/psi scale and a reverse-flow valve.
The L code sets the regulated band to 0.15-0.4 MPa (20-58 psi) for applications that must not exceed that ceiling. The J code means the mounting bracket is omitted, so you need a panel mount or an existing bracket. The K code adds a reverse-flow (reflux) valve as an ordering difference, and the 5 um element provides finer filtration.
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