Airtac GAFR Adjustable Filter Regulator GAFR400C15LJWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15LJWK 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15LJWK
The GAFR400C15LJWK is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. This model uses a 1/2in port, a 100 cc metal condensate bowl, and a 5 um element that traps fine particles for sensitive equipment. It operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi), making it suitable for gentle or precise applications.
The metal bowl is paired with a semi-auto plus manual drain, giving you both automatic condensate release and a manual override. A circular gauge with MPa/psi scale is fitted, and the unit weighs 880 g, indicating a robust build for panel or frame mounting. The reverse-flow (reflux) valve is included as an ordering difference, and no lubricator is present-this is purely filtration and regulation.
Airtac GAFR Adjustable Filter Regulator GAFR400C15LJWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15LJWK |
|---|---|
| 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 | Semi-auto drain + manual 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 GAFR400C15LJWK
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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 GAFC400-15 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 GAFR400C15LJWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require stable, low pressure (0.15-0.4 MPa) and clean air. The 5 um element removes fine particulates that could clog small orifices, while the balanced regulator holds the setpoint steady as supply fluctuates.
Test bench air supply
Use on a laboratory or test bench where instruments need a regulated, filtered air supply at lower pressures. The 100 cc metal bowl handles condensate from humid lines, and the manual drain allows controlled purging during maintenance.
Light assembly station
Power a light assembly station with pneumatic hand tools or actuators that operate best below 0.4 MPa. The compact 880 g body with a 1/2in port fits into tight machine frames, and the included gauge lets operators verify set pressure at a glance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15LJWK the Right Air-Prep Unit?
Choose the GAFR400 body when you need a 1/2in port and a 100 cc drain bowl that requires less frequent emptying than the 60 cc bowl on a GAFR300. The metal bowl (C) is a build choice for demanding environments, though the -5 to 70 C temperature range is identical across all bowl materials. The semi-auto+manual drain suits lines where occasional manual checking is acceptable, while the 5 um element (W) captures finer particles than the standard 40 um, at the cost of more frequent element service. The J code means no mounting bracket is included, so plan for a panel mount or existing bracket. The L type limits you to 0.15-0.4 MPa, so if your machine may ever need more pressure, select the standard S type instead. The fitted gauge reads MPa/psi due to the PT thread, and the K code adds the reverse-flow valve as a specified option. If oil is needed downstream, order the matching GAFC400-15 combination, as this unit does not lubricate. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the range, so ensure your inlet pressure stays near 1.0 MPa to reach the full regulated output.
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 GAFR400C15LJWK FAQ
This filter & regulator has a pressure range of 0.15-0.4 MPa (20-58 psi), a maximum 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 drain bowl holds 100 cc, and the unit weighs 880 g. The port is 1/2in, and the element grade is 5 um.
The K code indicates that a reverse-flow (reflux) valve is fitted to the GAFR400C15LJWK. This is an ordering difference from models without the K code. The function of the valve is detailed in the full catalogue, but it is included as a specified option on this unit.
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