Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJ 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
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJ
The GAFR300N15ALJ is a filter and regulator combined into one 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 element for standard filtration.
This model features a nylon bowl and an automatic drain, making it suitable for unattended operation. The circular gauge with MPa/psi scale is fitted, and the unit weighs 500 g. Its balanced regulator mechanism helps maintain a steady outlet pressure as supply varies.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJ |
|---|---|
| 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 | Automatic 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 GAFR300N15ALJ
| 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". |
| A | Drain: Automatic 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 GAFR300N15ALJ Is Used
Precision pressure setting
Ideal for applications requiring a stable, lower pressure output, such as feeding a precision pneumatic valve or a sensitive control circuit where a 0.15-0.4 MPa range is sufficient.
Compact machine builds
The single-body design saves valuable space on machine frames or panels. Its 500 g weight and 1/2in port make it a good fit for medium-sized assembly fixtures or test benches.
Unattended operation
The automatic drain makes this unit suitable for remote or continuously running equipment where manual condensate draining is impractical, such as in an automated packaging line.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJ the Right Air-Prep Unit?
Choose this GAFR300 when you need a 1/2in port and a lower pressure range of 0.15-0.4 MPa (20-58 psi). The nylon bowl offers an alternative to PC or metal; confirm compatibility with your environment. The automatic drain (A) handles condensate without manual intervention, while the missing bracket (J) suits panel-mount installations. The 40 um element is standard; upgrade to 5 um (W) for finer filtration. The PT thread comes with an MPa/psi gauge scale. For lubrication downstream, order the matching GAFC300-15 combination. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's 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 GAFR300N15ALJ FAQ
The GAFR300N15ALJ is a filter & regulator with a 1/2in port. Its pressure range is 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi), and proof pressure is 1.5 MPa (215 psi). The operating temperature range is -5 to 70 C. It has a 60 cc drain bowl and weighs 500 g.
The 'J' code means the mounting bracket is NOT included with this model. You would need to use an existing bracket or plan for a panel mount. If you require the standard bracket, you would order a version without the 'J' code.
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