Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJWK 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 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 size3/8"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJWK
The GAFR400C10ALJWK is a filter and regulator combined in one body, cleaning incoming air and holding a steady outlet pressure without a separate filter-regulator train. This 3/8in version weighs 880 g, uses a 5 um element, and carries a metal condensate bowl with a 100 cc capacity. It is a lower-pressure unit, regulating from 0.15 to 0.4 MPa (20-58 psi), and includes a circular gauge with MPa/psi scale.
The diversion structure inside spins the air to separate liquid water and solid particles before regulation. The balanced, self-locking regulator mechanism resists set-pressure drift from vibration, helping keep the outlet stable as supply pressure varies. This model has an automatic drain and a reverse-flow (reflux) valve fitted, and it ships without a mounting bracket.
Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJWK |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 3/8" (PT thread) |
| Filtering grade | 5 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 | Not included (J) |
| 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 GAFR400C10ALJWK
| 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). |
| J | No bracket (J) — supplied without the mounting bracket. |
| (blank) | Circular pressure gauge fitted. |
| 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 GAFC400-10 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 GAFR400C10ALJWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that need clean, regulated air at a stable lower pressure, with the 5 um element trapping fine particles.
Wet utility lines
Use on a wet factory air line where the automatic drain handles condensate without manual attention, and the metal bowl adds robustness.
Test rigs and benches
Supply a test rig or workbench station that requires a set pressure below 0.4 MPa, with the gauge providing local reading and the reflux valve fitted.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C10ALJWK the Right Air-Prep Unit?
Choose this GAFR400 when you need a 3/8in port with a 100 cc metal bowl and a 5 um element for finer filtration. The automatic drain suits unattended or wet lines, while the lower-pressure range (0.15-0.4 MPa) fits applications that never need more than 0.4 MPa. The J code means no bracket is included, so plan for panel mounting or an existing bracket. The K code adds a reverse-flow (reflux) valve as an ordering difference. If the line needs oil downstream, order the matching GAFC400-10 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 (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 GAFR400C10ALJWK FAQ
It is a filter & regulator with a 3/8in port, lower-pressure range 0.15-0.4 MPa (20-58 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 100 cc drain bowl, and 880 g weight. It has a 5 um element, automatic drain, metal bowl, no bracket, and a fitted gauge.
The K code indicates a reverse-flow (reflux) valve is fitted. It is an ordering difference from models without K; its specific function is detailed in the catalogue page not included in our data.
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