Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNK 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 GAFR400N15ALNK
The GAFR400N15ALNK is a filter & regulator with both functions sharing one body, so it replaces a separate GAF filter plus a GAR regulator with fewer joints to seal. This 1/2in version has a nylon bowl, an automatic drain, and a 40 um element, with a lower-pressure range of 0.15-0.4 MPa (20-58 psi).
The balanced, self-locking regulator holds the outlet steady as supply pressure varies, while the diversion structure spins incoming air to separate liquid water and solid particles into the 100 cc condensate bowl. Weighing 880 g, this unit needs a proper panel or frame mount rather than support from the tubing, and it carries no gauge, so the 1/4in gauge connection is ready for a field-installed unit.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNK |
|---|---|
| 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 GAFR400N15ALNK
| 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. |
| 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 GAFR400N15ALNK Is Used
Precision pressure setting
Set a stable 0.3 MPa supply for a precision pneumatic vise or a calibrated test fixture, where the balanced regulator holds the outlet steady as shop air pressure fluctuates.
Wet line protection
Feed a single-station assembly machine with a 1/2in line carrying condensate, relying on the automatic drain to purge water without an operator checking the bowl.
Instrument air pre-filter
Protect a sensitive analytical instrument that needs a clean 0.2 MPa air supply, using the 40 um element to trap solid particles before the pressure is set.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALNK the Right Air-Prep Unit?
Choose this GAFR400 body for 1/2in porting with a 100 cc drain bowl, a step up from the GAFR300's 60 cc bowl for less frequent draining. The nylon bowl suits environments where a clear sight glass is not required, while the automatic drain handles unattended or wet lines without manual intervention. This L-type unit tops out at 0.4 MPa, so confirm the downstream machine never needs more than that; the standard S type offers 0.15-0.9 MPa if higher pressure is a possibility. The mounting bracket is included, the 40 um element is fitted, and the PT thread carries the MPa/psi gauge scale, with no gauge supplied. The reverse-flow (reflux) valve is attached as an ordering difference, and if lubrication is needed downstream, order the matching GAFC400-15 combination instead. With a 1.0 MPa max supply, this unit 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 GAFR400N15ALNK FAQ
The GAFR400N15ALNK is a filter & regulator with a 1/2in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi), and the temperature range is -5 to 70 C. It has a 100 cc drain bowl, weighs 880 g, and uses a 40 um element.
The L code sets the regulated range to 0.15-0.4 MPa, which suits applications that never need more than 0.4 MPa, such as light clamping or low-force actuation. The N after the port means no gauge is supplied, so the set pressure cannot be read directly; the 1/4in gauge connection is available if you add one later.
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