Airtac GAFR Adjustable Filter Regulator GAFR300C15LJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C15LJ 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 40 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 grade40 µm
- Bowl materialMetal
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300C15LJ
The GAFR300C15LJ is a filter and regulator combined into a single body, so the incoming air is cleaned and then set to a steady outlet pressure without needing separate components. This model uses a 1/2in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a 40 um filter element, with a metal bowl protecting the 60 cc condensate chamber.
The diversion structure spins the air to separate liquid water and solid particles, dropping them into the drain bowl. Because the regulator is balanced and self-locking, the outlet pressure stays stable as supply pressure varies, and the pressed-in knob resists drift from vibration. The unit weighs 500 g, making it a compact solution for panel mounting where a separate filter and regulator would take up more rail width.
Airtac GAFR Adjustable Filter Regulator GAFR300C15LJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C15LJ |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Metal |
| Drain type | Semi-auto drain + manual 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 GAFR300C15LJ
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. 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". |
| (blank) | Drain: Semi-auto drain + manual 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. |
| (blank) | Filtering grade 40 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 GAFR300C15LJ Is Used
Precision valve control
Feed a bank of precision pneumatic valves that need a stable, lower supply pressure. The balanced regulator holds the outlet steady as line pressure fluctuates, and the 40 um element protects the valve internals from particulates.
Test bench air supply
Use this unit on a test bench where a regulated 0.15-0.4 MPa supply is required for calibration fixtures. The metal bowl suits a workshop environment, and the semi-auto drain keeps condensate manageable during long test cycles.
Single station machine
Mount this filter regulator on a single-station assembly machine with a 1/2in air feed. The 60 cc drain bowl reduces how often an operator needs to check condensate compared to smaller bodies, and the lower pressure range protects sensitive tooling.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C15LJ the Right Air-Prep Unit?
Choose the GAFR300 body when you need a 1/2in port and a 60 cc drain bowl, which is a step up from the GAFR200's 25 cc bowl for less frequent draining. The metal bowl (C) is a build choice for the condensate chamber, and you should confirm compatibility with your environment since the same pressure and temperature specs apply to all bowl materials. This model has the lower-pressure type (L), so it tops out at 0.4 MPa; if your machine might need more, select the standard S type instead. The J code means no mounting bracket is included, so plan for a panel mount or use an existing bracket, and the fitted circular gauge reads MPa/psi on the PT thread. The semi-auto plus manual drain gives you both automatic condensate release and a manual override, and the 40 um element handles general workshop air. If you need lubrication downstream, order the matching GAFC300-15 combination rather than this unit. 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, so the inlet pressure can sit comfortably above the setpoint.
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 GAFR300C15LJ FAQ
The GAFR300C15LJ is a filter and regulator with a 1/2in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). The proof pressure is 1.5 MPa (215 psi), and the temperature range is -5 to 70 C. It has a 60 cc drain bowl, weighs 500 g, and uses a 40 um filter element with a metal bowl.
The L type is designed for applications that only need up to 0.4 MPa, such as delicate tooling or low-force actuators. The J code means the mounting bracket is not included, so you will need to use a panel mount or an existing bracket. This gives you flexibility if you are replacing a unit in a fixed installation.
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