Airtac GAFR Adjustable Filter Regulator GAFR300N15SJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15SJK 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 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/2"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15SJK
The GAFR300N15SJK is a filter and pressure regulator combined in a single body, saving rail space and reducing potential leak points compared to separate units. It handles a 1/2in port with a 40 um element, and the nylon bowl provides a clear view of the 60 cc condensate capacity.
This standard-type unit regulates from 0.15 to 0.9 MPa (20-130 psi), with the circular gauge showing the MPa/psi scale. The balanced regulator mechanism helps maintain a steady outlet pressure as supply varies, while the diversion structure spins the air to separate liquid water and solid particles into the bowl.
Airtac GAFR Adjustable Filter Regulator GAFR300N15SJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15SJK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 | 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 GAFR300N15SJK
| 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". |
| (blank) | Drain: Semi-auto drain + manual drain. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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. |
| 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 GAFC300-15 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 GAFR300N15SJK Is Used
Precision Fixture Clamping
Feed a single precision clamping fixture on a machining center, where the 40 um element protects sensitive valves and the steady regulated pressure ensures consistent holding force.
Test Bench Air Supply
Provide clean, regulated air to a laboratory test bench with a 1/2in manifold, where the 60 cc bowl handles moderate condensate and the gauge allows accurate set-point adjustments.
Semi-Automatic Assembly Station
Supply a semi-automatic assembly station with a single 1/2in drop, where the filter removes water and solids from the line and the regulator maintains a stable pressure for pneumatic hand tools.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15SJK the Right Air-Prep Unit?
Choose this GAFR300N15SJK for a 1/2in line requiring filtration and regulation without lubrication. The nylon bowl (N) is a build choice, while the semi-auto plus manual drain (blank) suits attended lines where periodic draining is acceptable. The J code means no mounting bracket is included, so plan for a panel mount or existing bracket. The K code indicates a reverse-flow (reflux) valve is fitted, and the PT thread sets the gauge scale to MPa/psi. For lines needing oil downstream, order the matching GAFC300-15 combination instead. Note that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan your inlet pressure accordingly.
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 GAFR300N15SJK FAQ
The GAFR300N15SJK has a 1/2in port, a working pressure range of 0.15-0.9 MPa (20-130 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates in temperatures from -5 to 70 C, has a 60 cc drain bowl, and weighs 500 g. The unit uses a 40 um element and has a semi-auto plus manual drain.
The 'K' indicates that a reverse-flow (reflux) valve is fitted to the unit. This is an ordering difference from models without the K code. The specific function of the reverse-flow valve is detailed in the catalogue; for this listing, it is simply noted as an included feature.
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