Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJWK 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 gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJWK
The GAFR300N08ALJWK is a filter and regulator combined in a single body, saving rail space and reducing potential leak points compared to separate units. It delivers filtered air at a steady 0.15-0.4 MPa (20-58 psi) from its 1/4in port, with a 5 um element for fine particle removal.
This unit features a nylon bowl and an automatic drain, making it suitable for unattended operation. The pressed-in, self-locking knob maintains the set pressure despite vibration, while the diversion structure spins out liquid water and solid contaminants into the 60 cc condensate bowl.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJWK |
|---|---|
| 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. 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 GAFR300N08ALJWK
| 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. |
| (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 GAFR300N08ALJWK Is Used
Precision Fixturing
Feed a single pneumatic clamp or fixture with clean, regulated air. The 5 um element protects sensitive valves from fine particulates.
Instrument Air Supply
Provide a stable low-pressure source for analytical equipment or air gauges, where consistent 0.15-0.4 MPa output is critical.
Light Assembly Line
Power small actuators on a benchtop assembly station. The automatic drain reduces maintenance in humid plant environments.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJWK the Right Air-Prep Unit?
Choose the GAFR300 body for 1/4in or 3/8in port applications needing up to 3500 L/min flow (plotted at 0.7 MPa inlet). The nylon bowl offers an alternative build choice to PC or metal, with the same 1.0 MPa max pressure rating. This model includes an automatic drain (A) for wet lines, a 5 um element (W) for finer filtration, and a reverse-flow valve (K) as an ordering difference. The J code means no mounting bracket is included, and the gauge is fitted with an MPa/psi scale for PT threads. For lines needing lubrication downstream, order the matching GAFC300-08 combination instead. Note that 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 GAFR300N08ALJWK 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). It operates from -5 to 70 C, has a 60 cc drain bowl, and weighs 500 g.
The 'K' indicates the unit is fitted with a reverse-flow (reflux) valve. This is an ordering difference; the catalogue does not detail its function. This model also has a nylon bowl (N before port), automatic drain (A), lower pressure type (L), no bracket (J), and a 5 um element (W).
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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