Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK 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
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK
The GAFR400N15ALJNWK is a genuine AirTAC filter & regulator, combining air filtration and pressure regulation in one compact body. This 1/2in port model handles a lower pressure range of 0.15-0.4 MPa (20-58 psi), ideal for sensitive applications. It uses a 5 um filter element to trap fine particles, protecting downstream components.
This unit has a nylon bowl and an automatic drain, so it can handle condensate without manual intervention. The 100 cc drain bowl and 880 g weight place it in the mid-size class, needing proper panel mounting rather than tubing support. A reverse-flow (reflux) valve is fitted, and no gauge is supplied; the 1/4in gauge connection is available if you add one later.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK |
|---|---|
| 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 | 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 | 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. No gauge is supplied with this model — the gauge connection on a GAFR400 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK
| 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". |
| A | Drain: Automatic 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| 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 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 GAFR400N15ALJNWK Is Used
Precision valve control
Feed a 5 um filtered, regulated air supply to precision pneumatic valves or instrument circuits that need stable low pressure without gauge clutter.
Automated assembly station
Mount this 1/2in unit on a small assembly station where automatic draining and fine filtration keep actuators moving reliably without manual checks.
Test bench air supply
Use it on a test bench to provide a clean, low-pressure air source for calibration or testing, with the automatic drain handling condensate from wet shop lines.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNWK the Right Air-Prep Unit?
Choose this GAFR400 if you need a 1/2in port with a lower pressure range, automatic drain, and 5 um filtration. The nylon bowl offers a different build option compared to PC or metal, though all share the same 1.0 MPa max and -5 to 70 C rating. The J code means no bracket is included, so plan for panel mounting or use an existing bracket. The N after the port confirms no gauge is fitted, leaving the 1/4in connection open for your own gauge. The K code adds the reverse-flow valve, which is an ordering difference only. For lines needing oil downstream, the matching GAFC400-15 combination adds a lubricator. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's 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 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 GAFR400N15ALJNWK FAQ
This filter & regulator has a 1/2in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 100 cc and the unit weighs 880 g. It uses a 5 um element and has an automatic drain.
The N after the port code means no gauge is supplied, leaving a 1/4in gauge connection for you to add your own. The J code means the mounting bracket is omitted, so you can use an existing bracket or panel-mount the unit. Both options reduce cost when you don't need the standard accessories.
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