Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJW 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 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 size1/2"
- 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 GAFR400C15ALJW
The GAFR400C15ALJW is a filter and regulator combined into a single body, so the incoming air is cleaned and then set to a steady outlet pressure without needing separate parts. This unit has a 1/2in port, works in the lower 0.15-0.4 MPa (20-58 psi) range, and uses a 5 um element to trap fine particles.
The metal bowl holds 100 cc of condensate and uses an automatic drain, so it suits lines where regular manual draining is impractical. Weighing 880 g, this 400-series unit is a substantial component that needs proper mounting rather than support from the tubing alone.
Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJW |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (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 GAFR400C15ALJW
| 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). |
| 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). |
| 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. |
| (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 GAFR400C15ALJW Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require clean, regulated air at moderate pressure. The 5 um element protects sensitive internals from fine abrasive particles.
Machine tool coolant lines
Supply a machine tool's air-operated coolant pump where a steady lower pressure prevents overspray. The automatic drain keeps the metal bowl from filling during long production runs.
Test bench air supply
Provide a stable 0.15-0.4 MPa source for a laboratory test fixture. The balanced regulator holds the setpoint as shop supply fluctuates, and the gauge gives a clear local readout.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJW the Right Air-Prep Unit?
Choose the GAFR400 body when you need a 1/2in port and the 7000 L/min flow envelope plotted at 0.7 MPa inlet, stepping up from the GAFR300's 3500 L/min curve for larger demands. The metal bowl (C) is a build choice for the environment, while the automatic drain (A) handles condensate without operator attention. This model has no bracket (J), so plan for a panel mount or existing frame. The 5 um element (W) filters finer than the standard 40 um, though it will need more frequent service. The lower-pressure type (L) tops out at 0.4 MPa, and the fitted gauge reads in MPa/psi with PT threads. If the line needs lubrication downstream, order the matching GAFC400-15 combination instead. With a 1.0 MPa max supply, you have 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 GAFR400C15ALJW FAQ
The working pressure range is 0.15-0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). Temperature range is -5 to 70 C. The drain bowl holds 100 cc and the unit weighs 880 g.
The metal bowl (C) is selected as a build option for the environment, while the automatic drain (A) expels condensate without manual intervention. This combination suits installations where the unit is hard to reach or where lines carry high moisture loads.
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