Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNW 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 materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNW
The GAFR400C15ALJNW is a filter & regulator that combines both functions in a single body, saving rail space and reducing potential leak points compared to separate units. It handles a 1/2in port and weighs 880 g, placing it in the mid-range size class for machine headers and multi-station lines.
This version operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi) and uses a 5 um element for finer filtration. The metal bowl and automatic drain make it suitable for unattended operation, while the lack of a gauge means you'll need to add one via the 1/4in connection to monitor output.
Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNW |
|---|---|
| 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 | Metal |
| 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 GAFR400C15ALJNW
| GAFR400 | GA400 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 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. |
| (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 GAFR400C15ALJNW Is Used
Precision valve control
Feed a bank of precision pneumatic valves with the 5 um element, ensuring fine particles don't affect spool operation in a controlled manufacturing cell.
Machine tool header
Supply a compact machine tool header with filtered, regulated air at lower pressure, using the automatic drain to handle condensate without daily checks.
Instrument air feed
Provide cleaner air to sensitive instruments or gauges on a test bench, where the 5 um filtration and stable lower pressure range protect delicate components.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNW the Right Air-Prep Unit?
Choose this GAFR400 for 1/2in porting with a 100 cc metal bowl, which holds about 1.7x the condensate of the GAFR300's 60 cc bowl, meaning less frequent draining. The automatic drain handles wet lines without manual intervention, and the 5 um element suits precision applications but will need more frequent service than a 40 um unit. The lower pressure type tops out at 0.4 MPa, so confirm your system never needs more; the missing bracket means you'll need an existing panel mount, and the absent gauge requires adding one via the 1/4in connection. If oil is needed downstream, order the matching GAFC400-15 combination instead. For this model, 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 GAFR400C15ALJNW FAQ
This filter & regulator has a 1/2in port, operates at 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C, the metal drain bowl holds 100 cc, and the unit weighs 880 g.
The J code omits the mounting bracket for panel-mount installations, and the N code means no gauge is supplied. The gauge connection is 1/4in if you add one later, and you'll need an existing bracket or panel mount to secure the 880 g unit.
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