Airtac GAFR Adjustable Filter Regulator GAFR300N15SJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15SJN 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 gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15SJN
The GAFR300N15SJN is a filter and regulator combined into a single body, so incoming air is first spun to separate liquid water and solid particles, then set to a steady outlet pressure by a balanced regulator. This 1/2in unit operates from 0.15 to 0.9 MPa (20-130 psi) and comes with a 40 um element, with no lubricator involved.
Its nylon bowl holds 60 cc of condensate, and the whole assembly weighs 500 g. Because the filter and regulator share one housing, there are fewer joints to seal compared to separate GAF and GAR units, which also saves space on the rail.
Airtac GAFR Adjustable Filter Regulator GAFR300N15SJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15SJN |
|---|---|
| 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. 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 GAFR300N15SJN
| 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. |
| 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 GAFR300N15SJN Is Used
Single-station pneumatic press
Feed a bench-mounted press with regulated air at 0.6 MPa, relying on the 40 um element to keep cylinder seals clean and the 1/2in port to maintain cycle speed.
Machine tool coolant valve
Supply a solenoid-operated coolant valve on a lathe, where the filter removes pipe scale and the regulator holds a stable 0.4 MPa for consistent flow.
Assembly line work station
Power a torque tool and a small slide on an assembly bench, with the 60 cc bowl sized for a full shift before draining.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15SJN the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in porting with a 3500 L/min flow envelope at 0.7 MPa inlet, sitting between the smaller GAFR200 and the larger GAFR400. The nylon bowl suits applications where a transparent PC bowl is not preferred, though all bowl materials share the same 1.0 MPa max pressure and -5 to 70 C temperature range. This model has no mounting bracket (J code), so plan for a panel mount or existing bracket, and no gauge (N code), meaning the 1/8in gauge connection is available if you add one later. The semi-auto plus manual drain requires periodic attention, unlike an automatic drain option, and the standard pressure type covers most shop air systems. If the line needs oil downstream, order the matching GAFC300-15 combination instead. With a 1.0 MPa max supply, you have about 0.1 MPa of headroom above the 0.9 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 GAFR300N15SJN FAQ
Working pressure is 0.15-0.9 MPa (20-130 psi), max pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), temperature range is -5 to 70 C. The drain bowl holds 60 cc and the unit weighs 500 g.
The N after the port code means no gauge is supplied, so the 1/8in gauge connection is capped unless you add one. The J code means the mounting bracket is omitted, intended for installations that use an existing panel mount or frame bracket.
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