Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJK 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 GAFR300N15ALJK
This AirTAC GAFR300N15ALJK 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 a 1/2in port with a 40 um element and a 60 cc condensate bowl, weighing 500 g.
The lower-pressure version regulates from 0.15 to 0.4 MPa (20-58 psi), with a maximum supply of 1.0 MPa (145 psi). The nylon bowl and automatic drain suit applications where regular manual draining is impractical, while the fitted gauge shows the outlet pressure on an MPa/psi scale.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJK |
|---|---|
| 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 GAFR300N15ALJK
| 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. |
| 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 GAFR300N15ALJK Is Used
Precision pressure setting
Set a stable 0.3 MPa for a delicate clamping fixture where supply fluctuations would spoil the part. The balanced regulator holds the set pressure as inlet varies.
Compact machine build
Mount this 500 g unit on a panel for a small assembly machine. The single-body design saves rail width compared to separate filter and regulator parts.
Wet air line
Use the automatic drain on a line with frequent condensate. The 60 cc nylon bowl collects water and solids spun out by the diversion structure.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJK the Right Air-Prep Unit?
Choose GAFR300 for 1/4in to 1/2in port lines; the 1/2in port here flows well for medium-sized actuators. The nylon bowl (N) is a build choice with the same 1.0 MPa max and -5 to 70 C rating as PC or metal versions. The automatic drain (A) handles wet or unattended lines, while the missing bracket (J) suits panel mounting. The L-type regulator tops out at 0.4 MPa, so confirm your system never needs more. The 40 um element is standard; the fitted gauge reads MPa/psi with PT threads. The reverse-flow valve (K) is fitted as an ordering difference. If oil is needed downstream, order the matching GAFC300-15 combination instead. With the L-type, 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 GAFR300N15ALJK FAQ
The GAFR300N15ALJK is a filter & regulator with a 1/2in port, working pressure 0.15-0.4 MPa (20-58 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 60 cc drain bowl, and 500 g weight. It has a 40 um element, automatic drain, and no mounting bracket.
The L code means lower-pressure regulation, topping out at 0.4 MPa instead of the standard 0.9 MPa. This suits applications needing a precise low setpoint, but if your machine may ever require more than 0.4 MPa, the standard S type is the correct choice.
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