Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK 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 3/8" 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 size3/8"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK
The GAFR300N10LWK is a filter and regulator combined in a single body, so it conditions incoming air and stabilizes outlet pressure without needing separate units. It has a 3/8in port, works in the lower 0.15-0.4 MPa (20-58 psi) band, and uses a 5 um element for fine filtration. The nylon bowl and semi-auto plus manual drain are built for condensate collection, and the 60 cc bowl sets the service rhythm.
A balanced regulator mechanism keeps the set pressure steady as supply varies, while the pressed-in self-locking knob resists drift from vibration. The diversion structure spins the air to separate liquid water and solid particles into the bowl. This model includes a circular gauge with MPa/psi scale and a reverse-flow valve fitted as an ordering difference.
Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 3/8" (PT thread) |
| Filtering grade | 5 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 GAFR300N10LWK
| 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). |
| 10 | Port size 3/8". 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. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFC300-10 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 · 3/8" · curve to 3500 L/min |
|---|---|
| One size down | GAFR200 |
| One size up | GAFR400 (curve to 7000 L/min) |
| Add a lubricator | GAFC300-10 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK Is Used
Fine filtration for precision valves
Feed a bank of precision pneumatic valves on a small assembly station. The 5 um element removes fine particles that could affect sensitive pilot orifices, while the lower pressure range suits light actuation tasks.
Bench test rig with stable low pressure
Use it on a test bench where you need a steady 0.15-0.4 MPa supply for calibration or leak checking. The balanced regulator holds the set point as shop air pressure fluctuates, and the included gauge lets you read the output directly.
Compact machine sub-header
Mount it on a small machine frame to condition air for a single actuator or a short manifold. The 500 g weight and included bracket make it easy to secure, and the 60 cc bowl gives a reasonable interval between drain checks.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK the Right Air-Prep Unit?
Choose the GAFR300 body when you need 3/8in ports and a 500 g unit that suits a machine sub-header or a single station. The nylon bowl is a build choice; the common 1.0 MPa max and -5 to 70 C range apply to all bowl materials, so confirm compatibility for aggressive surroundings. This L-type tops out at 0.4 MPa, so if the line may ever need more pressure, select the standard S type instead. The 5 um element traps finer particles than the standard 40 um, at the cost of more frequent element service. The mounting bracket is included, and the semi-auto plus manual drain lets you empty the 60 cc bowl on a schedule or on demand. The PT thread sets the gauge scale to MPa/psi, and the K code adds the reverse-flow valve. If oil is needed downstream, order the matching GAFC300-10 combination rather than expecting this unit to lubricate. Max supply 1.0 MPa leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan the inlet pressure accordingly.
Quick checklist
- ✓ Body size for your peak flow (3/8" 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 GAFC300-10 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR300N10LWK FAQ
The GAFR300N10LWK is a filter and regulator in one body with a 3/8in port. The lower-pressure type operates from 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). Temperature range is -5 to 70 C and it must not freeze. The drain bowl holds 60 cc and the unit weighs 500 g. It has a 5 um element, nylon bowl, semi-auto plus manual drain, and a fitted gauge with MPa/psi scale.
The K code indicates a reverse-flow (reflux) valve is fitted to the GAFR300N10LWK. It is an ordering difference shown as a separate pneumatic symbol in the catalogue. The function of this valve is detailed on a page not included in our data, so we do not explain its operation here.
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