Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNW 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 GAFR300N08ALJNW
The GAFR300N08ALJNW 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 1/4in ports and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 5 um filter element for finer particle removal.
This model features a nylon bowl with an automatic drain, making it suitable for unattended operation. The unit weighs 500 g and has a 60 cc condensate bowl. The balanced regulator mechanism helps maintain a steady outlet pressure as supply varies, while the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNW |
|---|---|
| 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 GAFR300N08ALJNW
| 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. |
| (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 GAFC300-08 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 GAFR300N08ALJNW Is Used
Precision valve control
Feed a 5 um filtered, regulated 0.15-0.4 MPa supply to precision pneumatic valves on a small assembly station, where finer filtration protects sensitive internal components.
Laboratory air supply
Provide clean, low-pressure air to lab instruments or test fixtures that require a stable 0.15-0.4 MPa supply without the risk of over-pressurization.
Light duty automation
Use on a single-axis pick-and-place unit or small clamping fixture where the 1/4in port and compact 500 g body fit neatly into a tight control cabinet.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJNW the Right Air-Prep Unit?
Choose the GAFR300 body for 1/4in or 3/8in port applications needing a 60 cc drain bowl and a flow envelope plotted to 3500 L/min at 0.7 MPa inlet. The nylon bowl (N) offers a different build option from the standard PC or metal versions, though all share the same 1.0 MPa max pressure rating. This unit has an automatic drain (A) for wet or unattended lines, a 5 um element (W) for finer filtration, and no mounting bracket (J) for panel-mount installations. The lower-pressure type (L) tops out at 0.4 MPa, so verify your system never needs more. No gauge is fitted (N), but the 1/8in gauge connection allows adding one later. If oil is needed downstream, order the matching GAFC300-08 combination instead. The 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 (1/4" 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 GAFR300N08ALJNW FAQ
This filter & regulator has a 1/4in 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, has a 60 cc drain bowl, and weighs 500 g. The unit includes a 5 um filter element and an automatic drain.
The L type limits the regulated output to 0.15-0.4 MPa, which is ideal for sensitive equipment that must never see higher pressures. The J code means the mounting bracket is not included, so you need to provide your own panel mount or existing bracket for installation.
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