Airtac GAFR Adjustable Filter Regulator GAFR300C15SJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300C15SJN 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 materialMetal
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300C15SJN
The GAFR300C15SJN is a filter and pressure regulator combined into a single body, eliminating the need for separate GAF and GAR components. Its metal bowl and 40 um element handle water and solid particles, while the balanced regulator holds the set outlet pressure steady as supply varies.
This model uses a 1/2in port and operates from 0.15 to 0.9 MPa (20-130 psi). The 60 cc condensate bowl and 500 g mass place it in the mid-range GAFR300 class, requiring proper panel or frame mounting rather than support from the tubing.
Airtac GAFR Adjustable Filter Regulator GAFR300C15SJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300C15SJN |
|---|---|
| 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 | Metal |
| 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 GAFR300C15SJN
| GAFR300 | GA300 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. 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 GAFR300C15SJN Is Used
Precision valve control
Feed a bank of precision pneumatic valves on a machining center, where stable 0.15-0.9 MPa output and 40 um filtration protect sensitive spools from particle wear.
Mid-line conveyor section
Supply a 1/2in header serving a conveyor section with multiple air cylinders, using the 60 cc bowl to collect condensate from a moderately wet compressor line.
Assembly station air prep
Condition air for a manual assembly station with pneumatic screwdrivers and clamps, where the metal bowl resists knocks and the semi-auto drain allows routine maintenance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300C15SJN the Right Air-Prep Unit?
Choose the GAFR300 body for 1/2in port lines needing up to 3500 L/min at 0.7 MPa inlet, stepping down from the GAFR400's 7000 L/min envelope if space is tighter. The metal bowl suits demanding environments, though compatibility for aggressive surroundings should be confirmed. This unit ships with both semi-auto and manual drains, and the 40 um element is the standard grade. The J code means no mounting bracket is included, so plan for a panel mount or existing bracket. No gauge is fitted; the 1/8in gauge connection allows adding one later. PT threads with an MPa/psi scale are standard. For oil downstream, order the GAFC300-15 combination instead. 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 GAFR300C15SJN FAQ
The GAFR300C15SJN is a filter & regulator with a 1/2in port, working pressure 0.15-0.9 MPa (20-130 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 60 cc drain bowl, and 500 g weight. It has a 40 um element, metal bowl, semi-auto plus manual drain, and no gauge.
The N code after the port means no gauge is supplied, leaving a 1/8in gauge connection if you add one later. The J code means the mounting bracket is omitted, so you must use a panel mount or an existing bracket. Both codes let you avoid paying for components you do not need.
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