Airtac GAFR Adjustable Filter Regulator GAFR300N08L
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N08L 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 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 size1/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N08L
The GAFR300N08L is a filter and pressure regulator combined into a single body, so the incoming air is cleaned and then set to a steady outlet pressure without needing separate units. This lower-pressure version regulates from 0.15 to 0.4 MPa (20-58 psi) and uses a 40 um element; its nylon bowl collects the separated water and solids.
Because the filter and regulator share one housing, there are fewer threaded joints to leak than with a separate GAF filter plus GAR regulator, and the unit takes up less rail width. The pressed-in, self-locking knob resists set-pressure drift from vibration, and the circular gauge with magnifier shows the outlet pressure on an MPa/psi scale.
Airtac GAFR Adjustable Filter Regulator GAFR300N08L Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N08L |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Nylon |
| 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 | Included |
| 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 GAFR300N08L
| 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". |
| (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). |
| (blank) | Mounting bracket included. |
| (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 GAFC300-08 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 GAFR300N08L Is Used
Precision pressure setting
Use the lower-pressure range to set a precise 0.2 MPa for a delicate air bearing or a light clamping fixture, where the standard 0.9 MPa top would be too coarse to adjust.
Compact machine build
Mount this 500 g unit on a small assembly station's panel to filter and regulate a single pneumatic actuator, saving space compared to separate filter and regulator bodies.
Laboratory air supply
Feed a lab test rig that needs clean, low-pressure air at 0.3 MPa; the 40 um element traps particles before they reach sensitive orifices.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N08L the Right Air-Prep Unit?
Choose the GAFR300 body when you need a 1/4in port and a 60 cc condensate bowl, which holds about 2.4 times the condensate of the GAFR200's 25 cc bowl, so it needs draining less often. The nylon bowl is a build choice; the common specification (1.0 MPa max, -5 to 70 C) is identical to the PC and metal versions, so confirm compatibility for aggressive surroundings. This model ships with the mounting bracket, a semi-auto plus manual drain, and a fitted gauge; the L type tops out at 0.4 MPa, so if the machine may ever need more pressure, the standard S type is the correct part. If the line needs oil downstream, order the matching GAFC300-08 combination instead, as this unit does not lubricate. 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 GAFR300N08L FAQ
The GAFR300N08L is a filter & regulator with a 1/4in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). Its proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C (must not freeze). The nylon condensate bowl holds 60 cc, and the unit weighs 500 g.
The 'L' denotes the lower-pressure type, which regulates from 0.15 to 0.4 MPa (20-58 psi) instead of the standard 0.15-0.9 MPa. This is for applications that need a low, stable pressure and never require more than 0.4 MPa. The GAFR600 body does not offer this option.
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