Airtac GAFR Adjustable Filter Regulator GAFR300N08ASK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ASK 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 gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08ASK
The AirTAC GAFR300N08ASK combines a filter and a pressure regulator into a single body, saving rail space and reducing potential leak points compared to separate units. It handles 1/4in ports and delivers a standard pressure range of 0.15-0.9 MPa (20-130 psi) with a 40 um filter element.
This model features a nylon bowl and an automatic drain, making it suitable for unattended operation. The balanced regulator mechanism helps maintain a steady outlet pressure as supply varies, while the pressed-in self-locking knob resists drift from vibration. The diversion structure inside spins the air to separate liquid water and solid particles into the 60 cc drain bowl.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ASK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ASK |
|---|---|
| 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 | Included |
| 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 GAFR300N08ASK
| 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). |
| (blank) | Mounting bracket included. |
| (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 GAFC300-08 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 GAFR300N08ASK Is Used
Precision Fixtures
Feed a single precision fixture or a small indexing table with clean, regulated air. The 40 um element protects sensitive valves, and the automatic drain keeps the bowl from filling during long cycles.
Test Benches
Use on a test bench where a stable 0.15-0.9 MPa supply is needed for checking actuators or pilot valves. The self-locking knob holds the setpoint despite bench vibration.
Dedicated Machine Station
Mount on a dedicated machine station that runs continuously. The 60 cc bowl and automatic drain reduce maintenance stops, while the nylon bowl offers a different build option for the line.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ASK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/4in or 3/8in port lines, with a flow curve plotted to 3500 L/min at 0.7 MPa inlet. The nylon bowl (N) is a build choice, and the automatic drain (A) suits wet or unattended lines. The standard type (S) covers 0.15-0.9 MPa, the included bracket simplifies mounting, and the fitted gauge reads MPa/psi on the PT thread. The reverse-flow valve (K) is fitted as an ordering difference. If you need lubrication downstream, order the matching GAFC300-08 combination instead. With a 1.0 MPa max supply, you have about 0.1 MPa above the 0.9 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 GAFR300N08ASK FAQ
The GAFR300N08ASK 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). It operates from -5 to 70 C, has a 60 cc drain bowl, and weighs 500 g.
The K code indicates a reverse-flow (reflux) valve is fitted. It is an ordering difference from models without the K code; the catalogue does not detail its function in our data.
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