Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJN 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 40 µm filter element and regulates 0.15 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJN
The GAFR300N08ASJN is a compact filter & regulator that combines air filtration and pressure regulation in a single body, saving rail space and reducing potential leak points. This model features a 1/4in port, a nylon bowl, and an automatic drain, making it suitable for automated systems.
It operates in the standard range of 0.15-0.9 MPa (20-130 psi) and comes with a 40 um element. The unit weighs 500 g and has a 60 cc condensate bowl. The balanced regulator mechanism helps maintain a stable outlet pressure as supply varies, while the diversion structure spins air to separate liquid water and solid particles.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJN |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 GAFR300N08ASJN
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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. |
| (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 GAFR300N08ASJN Is Used
Precision Fixturing
Feed a single pneumatic clamp or fixture on an assembly station. The 1/4in port and 500 g weight suit compact machines where stable pressure is critical for consistent clamping force.
Test Benches
Supply clean, regulated air to a small test rig or bench setup. The automatic drain keeps the 60 cc bowl from filling during long unattended test cycles, and the standard pressure range covers most shop applications.
Single Actuator Lines
Protect a single air cylinder or rotary actuator on a dedicated line. This unit filters water and solids while holding the set pressure, and the nylon bowl offers a lightweight option for vibration-prone mounts.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJN the Right Air-Prep Unit?
This GAFR300 body with a 1/4in port suits small to medium automation. For a larger flow envelope, the GAFR400 with a 3/8in port is plotted to 7000 L/min at 0.7 MPa inlet, while this unit is plotted to 3500 L/min at 0.7 MPa inlet. The nylon bowl is a build choice; common specs are identical for PC, metal, or nylon, so confirm compatibility for aggressive environments. The automatic drain (A) handles condensate without manual intervention, ideal for wet or unattended lines. The J code means no mounting bracket is included, so plan for panel mounting or an existing bracket. No gauge is fitted (N); the 1/8in gauge connection is available if you add one later. The 40 um element is the standard grade. The PT thread uses an MPa/psi gauge scale. If downstream lubrication is ever needed, the matching GAFC300-08 combination adds a lubricator. Note that the 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 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 GAFR300N08ASJN FAQ
The GAFR300N08ASJN is a filter & regulator with a 1/4in port. Its pressure range is 0.15-0.9 MPa (20-130 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 60 cc drain bowl and weighs 500 g. The unit has a 40 um element and an automatic drain.
The GAFR300N08ASJN is ordered without a gauge (N code). The gauge connection port is 1/8in, so you can add an AirTAC gauge later if needed. Without one, the set pressure cannot be read directly on the unit. The J code also means no mounting bracket is included.
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