Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK
The GAFR400N15LJK is a filter & regulator with 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 delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 40 um element.
This nylon-bowl version weighs 880 g and includes a circular gauge with an MPa/psi scale. The diversion structure spins incoming air to separate liquid water and solid particles into the 100 cc drain bowl, while the balanced regulator holds the outlet steady as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK |
|---|---|
| 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 | Semi-auto drain + manual 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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. |
| (blank) | Circular pressure gauge fitted. |
| (blank) | Filtering grade 40 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 GAFR400N15LJK Is Used
Precision Fixture Clamping
Feed a single precision clamping fixture on an assembly line where a stable, lower pressure is required to avoid damaging delicate parts. The 100 cc bowl handles condensate from a modest air supply.
Lab Air Supply
Supply a laboratory bench with filtered air at a controlled lower pressure for pneumatic actuators on test equipment. The 40 um element protects sensitive valves, and the manual drain allows quick checks.
Panel-Mounted Regulator Station
Mount this unit directly to a machine panel using existing holes, since no bracket is supplied. The 880 g weight is manageable for a rigid panel, and the gauge provides a clear local readout.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJK the Right Air-Prep Unit?
Choose the GAFR400 body for medium-flow applications; its 7000 L/min flow curve at 0.7 MPa inlet inlet is double the GAFR300's envelope, making it a solid step up. The nylon bowl (N) suits environments where a transparent PC bowl might be a concern, though all bowl materials share the same 1.0 MPa max pressure rating. This model has a semi-auto drain plus a manual drain, both fitted, so you can either let it purge automatically or drain on demand. The L-type regulator tops out at 0.4 MPa (20-58 psi), so confirm your system never needs more than that. The J code means no mounting bracket is included, so plan for a panel mount or an existing bracket. A 40 um element is fitted as standard, and the PT thread means the gauge reads in MPa/psi. The K code indicates a reverse-flow (reflux) valve is attached, an ordering difference only. If your line needs oil downstream, order the matching 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 GAFR400N15LJK FAQ
The GAFR400N15LJK is a filter & regulator with a 1/2in port. Its lower pressure range is 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). Operating temperature is -5 to 70 C. The nylon drain bowl holds 100 cc, and the unit weighs 880 g. It has a 40 um element and a semi-auto plus manual drain.
The K code indicates that a reverse-flow (reflux) valve is fitted to this GAFR400N15LJK. It is an ordering difference from models without the K code. The catalogue does not detail its function, so treat it as a specified option for your application.
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