Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN 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 3/8" ports, a 40 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 size3/8"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialPC
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN
The GAFR40010ALJN is a filter and pressure regulator combined in a single body, so it cleans incoming air and sets a steady outlet pressure without needing separate units. This model uses a 3/8in port, a 40 um element, and a lower-pressure range of 0.15-0.4 MPa (20-58 psi), with a 100 cc condensate bowl.
The automatic drain clears collected water without manual intervention, and the 880 g body requires a proper panel or frame mount rather than support from tubing. The balanced regulator mechanism holds the set pressure steady as supply varies, and the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 3/8" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | PC |
| 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 GAFR40010ALJN
| GAFR400 | GA400 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 10 | Port size 3/8". 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. |
| (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 GAFC400-10 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 · 3/8" · curve to 7000 L/min |
|---|---|
| One size down | GAFR300 |
| One size up | GAFR500 (curve to 8000 L/min) |
| Add a lubricator | GAFC400-10 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN Is Used
Precision pressure setting
Set a stable 0.3 MPa supply for a pneumatic clamping fixture on a machining center, where the lower range gives finer adjustment resolution.
Wet line automatic drain
Use on a paint booth air line with high humidity; the automatic drain clears condensate without daily manual checks.
Compact machine build
Mount directly on a machine frame using existing holes, saving rail width compared to separate filter and regulator units.
Is the Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN the Right Air-Prep Unit?
Choose the GAFR400 body for a 3/8in port with a 100 cc drain bowl and a flow curve plotted to 7000 L/min at 0.7 MPa inlet, which is a step up from the GAFR300's 3500 L/min envelope. The L type limits regulation to 0.15-0.4 MPa (20-58 psi), so confirm your line never needs more than that. The automatic drain suits unattended or wet lines, while the omitted bracket (J) fits existing panel mounts. No gauge is supplied; the 1/4in gauge connection allows adding one later. The 40 um element is the standard grade, and the PT thread gives an MPa/psi gauge scale. If oil is needed downstream, order the matching GAFC400-10 combination instead. Max supply 1.0 MPa leaves about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (3/8" 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 GAFC400-10 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR40010ALJN FAQ
The GAFR40010ALJN is a filter & regulator with a 3/8in port, 40 um element, and lower pressure range of 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and temperature range is -5 to 70 C. The drain bowl holds 100 cc, and the unit weighs 880 g.
The J code omits the mounting bracket for panel-mount or existing brackets, and the N code means no gauge is supplied. The gauge connection is 1/4in if you add one later. The set pressure cannot be read without adding a gauge.
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