Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNW 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 GAFR400N15ALJNW
The GAFR400N15ALJNW is a filter and regulator combined into a single 880 g body with a 1/2in port, saving rail space versus separate GAF and GAR units. Its nylon bowl and automatic drain handle condensate from the diversion filter, which spins air to separate liquid water and solid particles down to 5 um.
This lower-pressure version regulates from 0.15 to 0.4 MPa (20-58 psi), with a 1.0 MPa (145 psi) maximum supply. The balanced regulator holds outlet pressure steady as inlet varies, while the pressed-in self-locking knob resists drift from vibration. No gauge is fitted; the 1/4in gauge connection allows adding one later.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNW |
|---|---|
| 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 GAFR400N15ALJNW
| 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. |
| (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 GAFR400N15ALJNW Is Used
Precision Valve Control
Feed a bank of precision pneumatic valves on a packaging line, where the 5 um element protects fine internal passages and the lower pressure range prevents over-pressurization.
Machine Tool Header
Supply a clean, regulated 0.15-0.4 MPa air supply to a multi-station machining fixture, with the automatic drain removing condensate without manual intervention.
Instrument Air Feed
Provide filtered air to laboratory instruments or gauging equipment where fine filtration matters and the lower pressure band suits sensitive components.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALJNW the Right Air-Prep Unit?
Choose this GAFR400 when a 1/2in port and 100 cc drain bowl match your flow needs; the flow curve plots to 7000 L/min at 0.7 MPa inlet, about double the 3500 L/min envelope of a GAFR300. The nylon bowl suits applications where PC might be a concern, and the automatic drain handles unattended operation. The 5 um element traps finer particles than the standard 40 um, while the missing bracket (J) suits panel mounting. The L-type regulation tops out at 0.4 MPa, so confirm your system never needs more. For oil downstream, order the GAFC400-15 combination instead. 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 GAFR400N15ALJNW FAQ
Working pressure range is 0.15-0.4 MPa (20-58 psi), with 1.0 MPa (145 psi) maximum and 1.5 MPa (215 psi) proof pressure. Temperature range is -5 to 70 C. The drain bowl holds 100 cc, the unit weighs 880 g, and the flow curve plots to 7000 L/min at 0.7 MPa inlet.
The N after the port code means no gauge is supplied, though the 1/4in gauge connection is present for adding one. The J code omits the mounting bracket, which suits installations using existing panel mounts or custom bracketry.
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