Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNWK 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 GAFR400N15ALNWK
The GAFR400N15ALNWK is a filter and regulator combined into one body, so it cleans incoming air and sets a steady outlet pressure without needing a separate filter plus regulator pair. This 1/2in model uses a 5 um element to trap fine particles and a nylon bowl rated for the common -5 to 70 C range, with a maximum supply of 1.0 MPa (145 psi).
Its lower-pressure regulator tops out at 0.4 MPa (58 psi), making it suitable for gentle pneumatic circuits. The automatic drain clears condensate from the 100 cc bowl without manual attention, and the included bracket simplifies panel mounting of this 880 g unit.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNWK |
|---|---|
| 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 | Included |
| 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 GAFR400N15ALNWK
| 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). |
| (blank) | Mounting bracket included. |
| 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 GAFR400N15ALNWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that need clean, regulated air at a stable lower pressure. The 5 um element protects sensitive internals, and the automatic drain keeps the 100 cc bowl from filling during long production runs.
Machine tool coolant lines
Supply a machine tool's air-operated coolant valves where consistent low pressure is critical. The nylon bowl resists the occasional splash of cutting fluid, and the included bracket mounts the 880 g unit securely to the machine frame.
Test bench air supply
Set up a test bench requiring a clean, low-pressure air source for calibration fixtures. The 1/2in port delivers adequate flow for multiple test stations, while the automatic drain reduces maintenance between shifts.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNWK the Right Air-Prep Unit?
Choose the GAFR400 body for 1/2in piping where a GAFR300 at 3/8in would restrict flow; the 400's flow curve plots to 7000 L/min at 0.7 MPa inlet versus 3500 for the 300. The nylon bowl suits applications where a metal bowl is too heavy or PC might be questioned, though all materials share the same 1.0 MPa maximum. This model has an automatic drain for wet or unattended lines, a 5 um element for finer filtration, and no gauge, so the 1/4in gauge connection is available if you add one later. The reverse-flow valve is fitted as an ordering difference, and the PT thread carries an MPa/psi gauge scale. If you need lubrication downstream, 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 band.
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 GAFR400N15ALNWK FAQ
It is a filter and regulator in one body with a 1/2in port, working range 0.15-0.4 MPa (20-58 psi), maximum pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), and temperature range -5 to 70 C. The drain bowl holds 100 cc, the unit weighs 880 g, and it has a 5 um element with an automatic drain.
The N after the port code means no gauge is supplied, but the 1/4in gauge connection is present if you add one later. The K code indicates a reverse-flow (reflux) valve is fitted; it is an ordering difference, and its function is detailed in the catalogue page not included here.
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