Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW 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 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/2"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW
The GAFR400N15LJW is a filter and 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 lower pressure range of 0.15-0.4 MPa (20-58 psi), and uses a 5 um element for finer filtration.
This model features a nylon bowl and a semi-auto plus manual drain, with the circular gauge fitted showing MPa/psi. Weighing 880 g, it is a substantial unit that requires proper mounting, especially since the bracket is omitted on this version.
Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| 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 | 100 cc |
| Bracket | Not included (J) |
| Weight | 880 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 GAFR400N15LJW
| GAFR400 | GA400 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 10 = 3/8", 15 = 1/2". |
| (blank) | Drain: Semi-auto drain + manual drain. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 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. |
| (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 GAFC400-15 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 | GAFR400 · 1/2" · curve to 7000 L/min |
|---|---|
| One size down | GAFR300 |
| One size up | GAFR500 (curve to 8000 L/min) |
| Add a lubricator | GAFC400-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW Is Used
Precision Valve Control
Feed a bank of precision pneumatic valves that require regulated air below 0.4 MPa, with the 5 um element protecting sensitive internal orifices from fine particulates.
Test Bench Supply
Supply a laboratory or test bench where a stable, lower pressure is needed for calibration fixtures, with the semi-auto drain allowing quick manual purging between test cycles.
Light Assembly Line
Power light assembly tools and single-station fixtures on a line where space is tight, using the single-body design to mount closer to the point of use without a separate filter and regulator.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW the Right Air-Prep Unit?
Choose this GAFR400 if your line needs 1/2in ports and a lower regulated pressure band, as the L type tops out at 0.4 MPa. The nylon bowl is a build choice, while the 5 um element suits precision applications but will need more frequent service than a 40 um unit. This version omits the bracket (J) and includes both semi-auto and manual drains, with the gauge fitted for direct reading. If you need oil downstream, order the matching GAFC400-15 combination instead. Note that the 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 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 100 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 880 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 GAFC400-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR400N15LJW FAQ
It has a 1/2in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), a max pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C, the drain bowl holds 100 cc, and the unit weighs 880 g.
The 'W' code specifies a 5 um filter element, which traps finer particles than the standard 40 um, making it suitable for precision valves or instrument air, though it will require more frequent servicing. The 'J' code means the mounting bracket is not included, so you must use an existing bracket or panel mount.
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