Airtac GAFR Adjustable Filter Regulator GAFR400N15ALN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALN 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 GAFR400N15ALN
The GAFR400N15ALN is a filter & regulator with the filter and the regulator housed in one body, so it replaces a separate GAF filter plus a GAR regulator with fewer joints to seal. It spins incoming air to drop liquid water and solid particles into the 100 cc condensate bowl, then delivers a steady outlet pressure via a balanced, self-locking mechanism that resists drift from vibration.
This model has a 1/2in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), a 40 um element, and a nylon bowl. The automatic drain clears condensate without manual attention, and the mounting bracket is included. There is no gauge fitted, so the set pressure cannot be read without adding one to the 1/4in gauge connection.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALN |
|---|---|
| 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 | 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 GAFR400N15ALN
| 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. |
| (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 GAFR400N15ALN Is Used
Precision valve control
Feed a bank of precision pneumatic valves on a machining center with the 1/2in port and steady lower-pressure output, keeping actuation consistent without over-pressuring sensitive components.
Wet utility line
Mount on a factory air drop with high condensate load; the automatic drain clears the 100 cc bowl continuously, and the nylon bowl suits the line's environment.
Low-pressure test rig
Supply a test bench requiring a regulated 0.15-0.4 MPa band; the balanced regulator holds the setpoint as shop pressure varies, and the included bracket secures the 880 g unit.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALN the Right Air-Prep Unit?
Choose the GAFR400 body for a 1/2in port and a 100 cc drain bowl, which holds about 2.7 times the condensate of the GAFR300's 60 cc bowl before needing a drain cycle. The nylon bowl is a build choice with the same 1.0 MPa max and -5 to 70 C limits as PC or metal, so confirm compatibility for aggressive surroundings. The automatic drain suits unattended or wet lines, while the lower-pressure type tops out at 0.4 MPa, so pick the standard type if the machine may ever need more. The included bracket supports the 880 g unit, the 40 um element is the standard grade, and the PT thread carries an MPa/psi gauge scale. If oil is needed 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 the 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 GAFR400N15ALN FAQ
Pressure range is 0.15-0.4 MPa (20-58 psi), max pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), temperature range is -5 to 70 C. The drain bowl holds 100 cc, the unit weighs 880 g, the port is 1/2in, and the element grade is 40 um.
The N after the port code means no gauge is supplied, so the set pressure cannot be read directly. If you add one later, the gauge connection on the GAFR400 body is 1/4in, and with the PT thread the scale reads MPa/psi.
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