Airtac GAFR Adjustable Filter Regulator GAFR300N15SJWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR300N15SJWK 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 5 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 grade5 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight500 g
About the Airtac GAFR Adjustable Filter Regulator GAFR300N15SJWK
The GAFR300N15SJWK is a filter and pressure regulator combined into a single body, eliminating the need for separate filter and regulator units. This 1/2in port model with a nylon bowl weighs 500 g and handles a standard pressure range of 0.15-0.9 MPa (20-130 psi), with a 5 um filter element for finer particle removal.
The diversion structure inside spins the incoming air to separate liquid water and solid particles into the 60 cc condensate bowl. A balanced, self-locking regulator mechanism holds the outlet pressure steady as supply pressure varies, and the pressed-in knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR300N15SJWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR300N15SJWK |
|---|---|
| Series | GAFR300 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 5 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 GAFR300N15SJWK
| 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. |
| 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 GAFC300-15 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 GAFR300N15SJWK Is Used
Precision Valve Control
The 5 um element and balanced regulator make this unit suitable for feeding precision pneumatic valves that need clean, stable air pressure within a tight operating envelope.
Machine Tool Air Supply
With a 1/2in port and 3500 L/min flow envelope at 0.7 MPa inlet, this filter-regulator can supply a single machine tool's air requirements, protecting downstream components from water and particulates.
Assembly Station Feed
The 60 cc condensate bowl and semi-auto drain suit an assembly station where operators can periodically check and manually drain accumulated water, while the filter keeps pneumatic tools running reliably.
Is the Airtac GAFR Adjustable Filter Regulator GAFR300N15SJWK the Right Air-Prep Unit?
This GAFR300 model with a 1/2in port sits between the smaller GAFR200 (1/4in, 25 cc bowl) and the larger GAFR400 (3/8in-1/2in, 100 cc bowl). The nylon bowl offers a build choice without changing the common 1.0 MPa maximum pressure or -5 to 70 C temperature rating. The semi-auto and manual drains are both fitted, allowing either automatic condensate release or manual operation. The 5 um element traps finer particles than the standard 40 um, making it suitable for precision applications, though it will require more frequent servicing. No mounting bracket is included with this J-code model, so plan for panel mounting or use an existing bracket. The fitted circular gauge reads in MPa/psi, matching the PT thread. The reverse-flow (reflux) valve is attached as an ordering difference. For lines needing oil downstream, order the matching GAFC300-15 combination instead. With a 1.0 MPa max supply, you have about 0.1 MPa above the 0.9 MPa top of the regulated range, so plan your inlet pressure near the maximum for full output.
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 GAFR300N15SJWK FAQ
The GAFR300N15SJWK operates in a pressure range of 0.15-0.9 MPa (20-130 psi), with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C. It has a 60 cc drain bowl, weighs 500 g, and its flow curve is plotted to 3500 L/min at 0.7 MPa inlet.
The K indicates a reverse-flow (reflux) valve is attached to this GAFR300N15SJWK. It is an ordering difference from models without the K code. The catalogue defers the function of this valve to a separate page, so no operational details are provided here.
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