Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN 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 materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN
The GAFR300N15ALN is a filter & regulator with both functions in one body, so it replaces a separate GAF filter plus GAR regulator with a single unit that has fewer joints to seal. It handles a 1/2in port and uses a 40 um element, with a nylon bowl and an automatic drain.
This lower-pressure model regulates from 0.15 to 0.4 MPa (20-58 psi), and the balanced mechanism holds the outlet steady as supply pressure varies. The pressed-in self-locking knob resists drift from vibration, and the diversion structure spins the air to separate liquid water and solid particles into the 60 cc drain bowl.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN |
|---|---|
| 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 | 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 | Included |
| Weight | 500 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. No gauge is supplied with this model — the gauge connection on a GAFR300 is 1/8" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN
| 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). |
| (blank) | Mounting bracket included. |
| N | No pressure gauge; 1/8" gauge connection. |
| (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 GAFR300N15ALN Is Used
Precision pressure setting
Use this unit to feed a sensitive pneumatic gauge or a calibration jig where the lower 0.4 MPa ceiling prevents accidental overpressure. The balanced regulator holds the set point as line pressure fluctuates.
Compact machine station
Mount this GAFR300 on a small assembly station with a 1/2in supply line. The automatic drain keeps the 60 cc bowl from overflowing during long shifts, and the included bracket simplifies panel mounting.
Controlled test setup
In a lab or test bench, the 40 um element traps particles before they reach sensitive valves. The lower pressure range and the self-locking knob keep the outlet stable during vibration from nearby equipment.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15ALN the Right Air-Prep Unit?
Choose the GAFR300N15ALN when you need a 1/2in port with a lower 0.15-0.4 MPa (20-58 psi) range, which suits delicate applications that must not see higher pressures. The nylon bowl is a build choice, and the automatic drain handles condensate without manual intervention; the mounting bracket is included, and no gauge is fitted, so the 1/8in gauge connection is available if you add one later. The 40 um element is the standard grade, and the PT thread is the default option. If the line needs oil downstream, order the matching GAFC300-15 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 (1/2" 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 GAFR300N15ALN FAQ
The GAFR300N15ALN is a filter & regulator with a 1/2in port, a working 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 from -5 to 70 C and must not freeze. The drain bowl holds 60 cc, the unit weighs 500 g, and the flow curve is plotted to 3500 L/min at 0.7 MPa inlet.
The 'N' after the port code means no gauge is supplied. The gauge connection on the GAFR300 body is 1/8in, so you can fit a compatible gauge later if you need to read the outlet pressure. Without a gauge, the set pressure cannot be read directly from the unit.
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