Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJWK 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 - 0.9 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 grade5 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJWK
The GAFR300N08ASJWK is a filter and regulator combined into a single body, eliminating the need for separate units. It spins incoming air to separate liquid water and trap solid particles, then delivers a steady outlet pressure through a balanced, self-locking regulator. This model has a 1/4in port, a nylon bowl, and a 5 um element, with a working range of 0.15-0.9 MPa (20-130 psi).
The 60 cc condensate bowl and 500 g weight define its size class, making it suitable for compact machine builds. The automatic drain handles condensate without manual intervention, and the reverse-flow valve is fitted as an ordering difference. No lubricator is present, so oil must be added downstream via the matching GAFC300-08 combination if needed.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJWK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 5 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. 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 GAFR300N08ASJWK
| 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. |
| (blank) | Circular pressure gauge fitted. |
| 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 GAFR300N08ASJWK Is Used
Precision valve control
The 5 um element protects sensitive pneumatic valves from fine particulates, while the balanced regulator maintains a stable setpoint for consistent actuation.
Compact machine builds
At 500 g with a 1/4in port, this unit fits tight spaces on small assembly machines, providing filtered and regulated air in one body to save rail width.
Automated test fixtures
The automatic drain and self-locking knob keep a test fixture running unattended, holding pressure settings against vibration without manual adjustment.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ASJWK the Right Air-Prep Unit?
Choose the GAFR300 for 1/4in or 3/8in ports, with a flow envelope plotted to 3500 L/min at 0.7 MPa inlet, stepping up from the GAFR200's 2000 L/min. The nylon bowl is a build choice, with the same 1.0 MPa max pressure and -5 to 70 C range as PC or metal options. The automatic drain suits wet or unattended lines, while the 5 um element traps finer particles than the standard 40 um. No bracket is included with this J code, and the PT thread pairs with an MPa/psi gauge scale. For oil downstream, order the 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 GAFR300N08ASJWK FAQ
Working pressure is 0.15-0.9 MPa (20-130 psi), with a 1.0 MPa (145 psi) maximum and 1.5 MPa (215 psi) proof pressure. Temperature range is -5 to 70 C. The drain bowl holds 60 cc and the unit weighs 500 g, with a flow curve plotted to 3500 L/min at 0.7 MPa inlet.
The K indicates a reverse-flow (reflux) valve is fitted, shown as a separate pneumatic symbol in the catalogue. It is an ordering difference only; its function is detailed on a page not included in our data.
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