Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK 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 3/8" 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 size3/8"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK
The GAFR400C10ALK is a filter and pressure regulator combined into a single body, eliminating the need for separate GAF and GAR units. This 3/8in port model operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi) and comes with a 40 um element, a metal bowl, and an automatic drain.
Its diversion structure spins incoming air to separate liquid water and solid particles into the 100 cc metal bowl, while the balanced regulator holds the set outlet pressure steady. The pressed-in self-locking knob resists drift from vibration, and the included circular gauge displays the output in MPa/psi.
Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 3/8" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Metal |
| 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 GAFR400C10ALK
| GAFR400 | GA400 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 10 | Port size 3/8". 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 GAFC400-10 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 · 3/8" · curve to 7000 L/min |
|---|---|
| One size down | GAFR300 |
| One size up | GAFR500 (curve to 8000 L/min) |
| Add a lubricator | GAFC400-10 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK Is Used
Precision pressure setting
Set a stable 0.3 MPa supply for a sensitive pneumatic positioner or a small clamping fixture where higher pressures could damage the workpiece.
Unattended machine station
The automatic drain clears condensate from the 100 cc metal bowl without manual checks, suiting a lightly supervised assembly cell running on a 3/8in line.
Vibration-prone equipment
The self-locking knob holds the set pressure on a machine with constant vibration, such as a small press or a packaging station, reducing the need for readjustment.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK the Right Air-Prep Unit?
Choose this GAFR400 for 3/8in lines where a lower regulated pressure of 0.15-0.4 MPa (20-58 psi) is sufficient, and where the 100 cc metal bowl and automatic drain suit an unattended installation. The metal bowl is a build choice; confirm compatibility with aggressive surroundings. The included bracket simplifies mounting, and the fitted gauge shows MPa/psi. The 40 um element handles general shop air. The reverse-flow (reflux) valve is fitted as an ordering difference. For lines needing oil downstream, order the matching GAFC400-10 combination instead. Note that 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (3/8" 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 GAFC400-10 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR400C10ALK FAQ
The GAFR400C10ALK has a 3/8in port, a pressure range of 0.15-0.4 MPa (20-58 psi), a max pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). Its temperature range is -5 to 70 C, it has a 100 cc drain bowl, and it weighs 880 g.
The 'K' indicates that a reverse-flow (reflux) valve is fitted to this model. It is an ordering difference from the standard version. The catalogue defers the detailed function of this valve to a separate page, so its operation is not described here.
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