Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW 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 1/2" 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 size1/2"
- 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 GAFR300N15ALJW
The GAFR300N15ALJW is a filter and regulator combined into a single body, handling both air cleaning and pressure control without needing separate components. It serves a 1/2in port line with a lower pressure range of 0.15-0.4 MPa (20-58 psi) and uses a 5 um filter element to capture fine particles.
This unit features a nylon bowl with an automatic drain, so condensate is expelled without manual intervention. Its balanced regulator mechanism keeps the outlet pressure stable as supply varies, and the pressed-in self-locking knob resists drift from vibration, making it suitable for equipment with fluctuating inlet conditions.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (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 GAFR300N15ALJW
| 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). |
| 15 | Port size 1/2". 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 GAFC300-15 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 · 1/2" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require clean, low-pressure air at a steady 0.15-0.4 MPa. The 5 um element protects fine internal passages from particle wear.
Lab instrument air
Supply a laboratory fixture or test rig that operates at low pressure. The automatic drain keeps the nylon bowl clear of condensate during long, unattended test cycles.
Light assembly station
Power a single-axis actuator or a small clamping fixture on an assembly bench. The 500 g body mounts directly to a panel using existing holes, since no bracket is included.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW the Right Air-Prep Unit?
Choose the GAFR300N15ALJW when you need a 1/2in port with a lower pressure range, ideal for applications that never exceed 0.4 MPa. The nylon bowl offers an alternative to PC or metal, while the automatic drain suits unattended or wet lines. This model omits the mounting bracket (J) for panel-mount installations, and the 5 um element provides finer filtration than the standard 40 um grade. The fitted circular gauge reads in MPa/psi, matching the PT thread. If oil is needed downstream, order the matching GAFC300-15 combination instead. Note that the 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 (1/2" 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 GAFC300-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ALJW FAQ
This filter & regulator has a 1/2in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum supply pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C. The nylon drain bowl holds 60 cc of condensate, and the unit weighs 500 g.
The L type code limits the regulated output to 0.15-0.4 MPa, which is suitable for circuits that must never exceed that ceiling. The J code omits the mounting bracket, so you plan to mount the 500 g unit to a panel or an existing frame rather than supporting it from the tubing.
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