Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJW 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 GAFR300N08ALJW
The GAFR300N08ALJW is a filter and pressure regulator combined into a single body, with no lubricator section. It handles a 1/4in port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi), filtering down to 5 um. The nylon bowl and automatic drain make it a low-maintenance choice for lines that need frequent condensate removal.
The diversion structure spins incoming air to separate liquid water and solid particles into the 60 cc drain bowl. Because the filter and regulator share one housing, this unit replaces a separate GAF filter plus GAR regulator, reducing potential leak points and saving space on the rail.
Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJW |
|---|---|
| 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 GAFR300N08ALJW
| 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. |
| (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 GAFR300N08ALJW Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require clean, regulated air at a stable lower pressure. The 5 um element protects sensitive internal orifices from fine particulates.
Bench test rigs
Supply a laboratory or workshop test rig where a consistent 0.15-0.4 MPa output is needed for calibration or component testing. The automatic drain keeps the bowl from filling during long test cycles.
Compact machine stations
Protect a single actuator or small clamping station on a production line. The 500 g body mounts neatly without adding excessive weight, and the self-locking knob holds the set pressure despite machine vibration.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJW the Right Air-Prep Unit?
This GAFR300 model is sized for 1/4in ports and weighs 500 g, placing it in the mid-range class above the GAFR200 (290 g) but below the GAFR400 (880 g). The nylon bowl is a build option that suits environments where a metal bowl is not required, though compatibility for aggressive surroundings should be confirmed. The automatic drain (A) handles condensate without manual intervention, ideal for wet lines or unattended operation. The L-type regulator tops out at 0.4 MPa, so verify your system never needs more than that. This unit ships without a bracket (J), meaning you will need a panel mount or existing support. The 5 um element traps finer particles than the standard 40 um, but will require more frequent servicing. The fitted gauge reads in MPa/psi, matching the PT thread. If oil is needed downstream, order the matching GAFC300-08 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 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 GAFR300N08ALJW FAQ
This filter & regulator has a 1/4in port, a 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 in temperatures from -5 to 70 C and must not freeze. The drain bowl holds 60 cc and the unit weighs 500 g. It includes a 5 um filter element and an automatic drain.
The L in the code indicates the lower-pressure type, which is designed for applications that only need up to 0.4 MPa (58 psi). The J code means the mounting bracket is not included, so you must provide your own panel mount or use an existing bracket. This is a deliberate choice for installations where the standard bracket is not needed.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Air-Preparation Units
Request a Quote for Airtac GAFR Adjustable Filter Regulator GAFR300N08ALJW
Send us the quantity, thread type (PT / G / NPT) and destination. We confirm price, stock and lead time — usually within 7-8 hours.