Airtac GAFR Adjustable Filter Regulator GAFR400N15ALK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ALK 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 gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALK
The GAFR400N15ALK is a filter and regulator combined into a single body, handling both air preparation steps without the need for separate components. It delivers air within a lower pressure band of 0.15-0.4 MPa (20-58 psi) through its 1/2in port, while the integrated 40 um element captures solid particles.
This unit features a nylon bowl and an automatic drain, making it suitable for applications where regular manual maintenance is not practical. The included circular gauge with an MPa/psi scale provides a clear readout of the set pressure, and the pressed-in self-locking knob helps maintain the setting despite vibration.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ALK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ALK |
|---|---|
| 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. 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 GAFR400N15ALK
| 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. |
| (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 GAFR400N15ALK Is Used
Precision Pressure Setting
Use this lower-pressure regulator for sensitive pneumatic controls that must not see supply spikes above 0.4 MPa, such as in a precision assembly fixture.
Laboratory Air Supply
Feed a lab bench or test rig with clean, regulated air at a stable low pressure, where the automatic drain ensures the 100 cc bowl never overflows during long experiments.
Dedicated Machine Station
Mount this 880 g unit on a machine frame to supply a single station with filtered air at a consistent low pressure, using the included bracket for a secure installation.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ALK the Right Air-Prep Unit?
Choose this GAFR400 model for a 1/2in port line requiring a lower regulated pressure, as the L type tops out at 0.4 MPa. The nylon bowl offers an alternative build to the standard PC, while the automatic drain (A) is ideal for unattended operation or wet air lines. This version includes the mounting bracket and a circular gauge, and the PT thread means the gauge scale reads in MPa/psi. The fitted reverse-flow valve (K) is an ordering difference to note. If your line needs 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 this unit's 0.4 MPa regulated top.
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 GAFR400N15ALK FAQ
This filter & regulator has a working pressure range of 0.15-0.4 MPa (20-58 psi), a maximum supply pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates in temperatures from -5 to 70 C and must not freeze. The unit has a 100 cc drain bowl and weighs 880 g.
The 'K' indicates that a reverse-flow (reflux) valve is fitted to the unit. This is an ordering difference from models without the 'K' code; the specific function of the valve is detailed in separate catalogue documentation.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
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