Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJN 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 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 size1/2"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJN
The GAFR400N15ALJN is a filter and regulator combined into a single body, so the incoming air is spun to separate liquid water and solid particles before a balanced regulator holds the outlet steady. It has no lubricator and only one bowl, the 100 cc condensate bowl. This unit uses a 1/2in port, a 40 um element, and a lower-pressure range of 0.15-0.4 MPa (20-58 psi), with a maximum supply of 1.0 MPa (145 psi).
This model comes with a nylon bowl and an automatic drain, meaning it suits unattended lines where condensate must be expelled without manual intervention. Weighing 880 g, it is a substantial unit that needs a proper panel or frame mount rather than support from the tubing. The gauge connection is 1/4in if you add a pressure gauge later.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJN |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 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 GAFR400N15ALJN
| 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. |
| (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 GAFC400-15 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 GAFR400N15ALJN Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require a stable, lower supply pressure. The balanced regulator holds the setpoint steady as line pressure varies, protecting sensitive actuators from surges.
Unattended machine station
Mount this on a machine station where the automatic drain removes condensate without an operator. The 100 cc bowl and 1/2in port suit a medium-sized station drawing up to the 7000 L/min envelope.
Panel-mounted lower-pressure circuit
Use it in a control panel where a lower 0.15-0.4 MPa range is required and space is tight. Without a bracket, it mounts directly to the panel, and the nylon bowl offers a different build option.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJN the Right Air-Prep Unit?
Choose the GAFR400 body when you need a 1/2in port and a flow envelope plotted to 7000 L/min at 0.7 MPa inlet, which is double the 3500 L/min of the GAFR300. The nylon bowl is a build choice, not a performance upgrade, so confirm compatibility for aggressive surroundings. The automatic drain handles condensate without attention, while the L-type regulator tops out at 0.4 MPa, making it unsuitable if the machine may ever need more pressure. No bracket is included, so plan for a panel mount or an existing bracket, and no gauge is fitted, so the set pressure cannot be read without adding one. If oil is needed downstream, order the matching GAFC400-15 combination instead. 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 GAFR400N15ALJN FAQ
The working pressure range is 0.15-0.4 MPa (20-58 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 and must not freeze. The drain bowl holds 100 cc and the unit weighs 880 g. It has a 1/2in port, a 40 um element, and an automatic drain.
The J code means the mounting bracket is omitted, so you need a panel mount or an existing bracket. The N code after the port means no gauge is supplied; the gauge connection is 1/4in if you add one later. This keeps the unit compact for panel installations where the set pressure is checked with a separate gauge.
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