Airtac GAFR Adjustable Filter Regulator GAFR400N15LJNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15LJNWK 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
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJNWK
The GAFR400N15LJNWK is a filter and pressure regulator combined into a single 880 g body with a 1/2in port, rated for 0.15-0.4 MPa (20-58 psi). Its 5 um element traps fine particles, and the nylon bowl collects condensate from the diversion-style separation.
This unit replaces separate filter and regulator components, reducing potential leak points. The balanced, self-locking adjustment mechanism helps maintain the set outlet pressure despite supply variations, and the pressed-in knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR400N15LJNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15LJNWK |
|---|---|
| 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 | 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. 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 GAFR400N15LJNWK
| 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| W | Filtering grade 5 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 GAFR400N15LJNWK Is Used
Precision pneumatic controls
Feed a 5 um filtered, regulated air supply to sensitive pilot valves or instrument loops in a manufacturing cell, where consistent low pressure is critical.
Laboratory test fixtures
Use in a lab bench setup to provide a stable, filtered air source for calibration jigs or pneumatic actuators that must not exceed 0.4 MPa.
Specialized machine build
Incorporate into a custom machine's pneumatic circuit where a compact, combined filter-regulator with a 1/2in port is needed for a low-pressure sub-system.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15LJNWK the Right Air-Prep Unit?
Choose this GAFR400 for 1/2in lines needing lower regulated pressure, up to 0.4 MPa. The nylon bowl offers an alternative build; confirm compatibility with your environment. This model has no mounting bracket (J) and no gauge (N) - the 1/4in gauge connection is available if you add one later. The 5 um element suits precision applications but requires more frequent service than a 40 um unit. The semi-auto and manual drains are both fitted, and the reverse-flow (reflux) valve is present as an ordering difference. If downstream lubrication is needed, order the matching GAFC400-15 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated 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 GAFR400N15LJNWK FAQ
This unit has a 1/2in port, a working pressure range of 0.15-0.4 MPa (20-58 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). The operating temperature range is -5 to 70 C. It has a 100 cc drain bowl and weighs 880 g.
The 'N' code means no pressure gauge is supplied; the 1/4in gauge connection port is present if you wish to add one. The 'J' code means the mounting bracket is not included, so you will need to use an existing bracket or panel-mount the unit.
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