Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK 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 1/4" 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 size1/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK
The GAFR300N08ALJNWK is a filter and regulator combined into a single body, saving space and reducing potential leak points compared to separate units. It handles 1/4in ports and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi), with a 5 um element for finer filtration.
This model features a nylon bowl, an automatic drain, and no gauge, with a 1/8in gauge connection available if one is added later. The unit weighs 500 g and its flow curve is plotted to 3500 L/min at 0.7 MPa inlet, making it suitable for light-duty applications where precise low-pressure control is needed.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 5 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 GAFR300N08ALJNWK
| 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). |
| 08 | Port size 1/4". 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. |
| 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 GAFC300-08 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 · 1/4" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-08 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK Is Used
Precision Fixturing
Feed a precise low-pressure signal to a small clamping fixture or a delicate positioning cylinder where consistent, gentle force is critical.
Lab Air Supply
Provide filtered, low-pressure air to a laboratory instrument or a pneumatic actuator on a test bench, where fine particle removal and stable low pressure are required.
Light Assembly Line
Use on a light assembly line to power small tools or single-acting actuators that operate within the lower pressure band, ensuring clean air without over-pressurizing sensitive components.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK the Right Air-Prep Unit?
Choose this GAFR300 for 1/4in port systems needing lower outlet pressure, with the L type capping at 0.4 MPa. The nylon bowl offers a build choice, while the automatic drain suits wet or unattended lines. This version omits the bracket and gauge, and includes a 5 um element and a reverse-flow valve. If oil is needed downstream, order the matching GAFC300-08 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the regulated range.
Quick checklist
- ✓ Body size for your peak flow (1/4" 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 GAFC300-08 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNWK FAQ
This filter & regulator has a 1/4in 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). Its temperature range is -5 to 70 C. The drain bowl capacity is 60 cc and the unit weighs 500 g.
The 'N' after the port code means no gauge is supplied; a 1/8in gauge connection is present if you need to add one. The 'J' code means the mounting bracket is omitted, which is suitable for panel-mount installations or when using an existing bracket.
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