Airtac GAFR Adjustable Filter Regulator GAFR300N15ASNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15ASNK 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
- Drainautomatic
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15ASNK
This AirTAC GAFR300N15ASNK is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. It has a 1/2in port, a 0.15-0.9 MPa (20-130 psi) standard pressure range, and a 40 um element that traps solid particles. The nylon bowl collects condensate, and the automatic drain clears it without manual attention.
The unit weighs 500 g and its flow curve is plotted to 3500 L/min at 0.7 MPa inlet, which helps size it for medium-duty lines. Because the filter and regulator share one body, there are fewer joints to seal than with a separate filter plus regulator setup. No gauge is fitted, so the 1/8in gauge connection is available if you add one later.
Airtac GAFR Adjustable Filter Regulator GAFR300N15ASNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15ASNK |
|---|---|
| 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 | 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 GAFR300N15ASNK
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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. |
| 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 GAFR300N15ASNK Is Used
Medium automation cells
Feed a 1/2in line to a multi-station assembly cell where consistent pressure keeps actuators moving predictably. The automatic drain reduces maintenance rounds on wet compressor air.
Machine tool coolant systems
Supply filtered air to pneumatic valves on a lathe or mill with a 1/2in port. The 60 cc bowl holds enough condensate for a full shift, and the standard range covers typical shop pressures.
Test benches with gauges
Use this unit on a bench where you add your own pressure gauge to the 1/8in connection. The 40 um element protects sensitive test fixtures from particle wear.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15ASNK the Right Air-Prep Unit?
Choose the GAFR300 body when you need a 1/2in port and a 60 cc drain bowl, which suits medium-flow applications. The nylon bowl is a build choice; the common 1.0 MPa max pressure and -5 to 70 C range apply regardless of bowl material, so confirm compatibility for aggressive surroundings. This model has an automatic drain for unattended or wet lines, and the mounting bracket is included. The standard S type covers 0.15-0.9 MPa, and the 40 um element handles general filtration. The PT thread means the gauge scale is MPa/psi, and the reverse-flow valve is fitted as an ordering difference. If oil is needed 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.
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 GAFR300N15ASNK FAQ
The working pressure range is 0.15-0.9 MPa (20-130 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. The drain bowl holds 60 cc, and the unit weighs 500 g. It uses a 40 um element and has a 1/2in port.
The K code means a reverse-flow (reflux) valve is fitted, which is an ordering difference from standard units. The N after the port means no gauge is supplied, so you would need to add one to the 1/8in connection to read outlet pressure. The automatic drain and nylon bowl are separate options that affect maintenance and build.
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