Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJNK 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 gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJNK
The GAFR300N15ALJNK is a filter and 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 lower-pressure range of 0.15-0.4 MPa (20-58 psi), and uses a 40 um element to trap solid particles.
This unit features a nylon bowl and an automatic drain, making it suitable for wet or unattended lines. The diversion structure spins incoming air to separate liquid water and solids into the 60 cc condensate bowl, while the balanced regulator maintains a steady outlet pressure as supply varies.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJNK |
|---|---|
| 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. 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 GAFR300N15ALJNK
| 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. |
| 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 GAFR300N15ALJNK Is Used
Precision Pressure Setting
Use this lower-pressure regulator for applications requiring a precise 0.15-0.4 MPa output, such as delicate clamping or air logic circuits where higher pressures could damage components.
Wet Utility Lines
The automatic drain and nylon bowl make this unit a fit for factory air lines with high moisture content, where regular manual draining would be impractical or forgotten.
Compact Machine Builds
With no bracket and a single combined body, this model suits compact machine builds where mounting is handled by existing panels and space is at a premium.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJNK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in port applications needing a 60 cc drain bowl and a 500 g footprint, positioned between the smaller GAFR200 and larger GAFR400 in the range. The nylon bowl offers an alternative build to PC or metal, with the same 1.0 MPa max pressure and -5 to 70 C temperature rating. The automatic drain (A) handles condensate without manual intervention, while the J code means no mounting bracket is included. The N after the port indicates no gauge is fitted, but the 1/8in gauge connection is ready for one. The K code adds a reverse-flow (reflux) valve as an ordering difference. For lines needing lubrication downstream, order the matching GAFC300-15 combination instead. With a 1.0 MPa max supply, this lower-pressure unit leaves about 0.6 MPa above the 0.4 MPa top of its regulated 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 GAFR300N15ALJNK FAQ
The GAFR300N15ALJNK is a filter & regulator with a 1/2in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C. It has a 60 cc drain bowl and weighs 500 g.
The K code indicates a reverse-flow (reflux) valve is fitted to the GAFR300N15ALJNK. This is an ordering difference from models without the K code; the catalogue defers the valve's specific function to another page not included in our data.
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