Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJK 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 materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJK
The GAFR400C15ALJK 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 1/2in version uses a metal bowl and a 40 um element, with a lower-pressure range of 0.15-0.4 MPa (20-58 psi).
Its diversion structure spins the air to throw liquid water and solid particles into the 100 cc drain bowl, while the balanced regulator keeps the set pressure stable as supply varies. The pressed-in self-locking knob resists drift from vibration, and the circular gauge with magnifier shows the outlet pressure on an MPa/psi scale.
Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJK |
|---|---|
| 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 | 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 GAFR400C15ALJK
| 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. |
| (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 GAFR400C15ALJK Is Used
Precision pressure setting
Feed a precision pneumatic valve or a sensitive control circuit that requires a stable, lower regulated pressure. The balanced regulator holds the outlet steady as supply pressure fluctuates, and the 40 um element protects the valve from particle wear.
Machine tool coolant lines
Supply a machine tool's air-operated coolant valve or work-holding fixture with clean, regulated air at a consistent lower pressure. The automatic drain clears condensate without manual attention, and the metal bowl suits the shop floor environment.
Test rig air supply
Provide a controlled 0.15-0.4 MPa air supply to a test fixture or calibration bench. The 100 cc drain bowl handles condensate from a wet line, and the included gauge lets operators verify the set pressure at a glance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJK the Right Air-Prep Unit?
Choose the GAFR400 body when you need 1/2in ports and a 100 cc condensate bowl, stepping up from the GAFR300's 60 cc bowl for longer intervals between drains. The metal bowl is a build choice for demanding environments, though the 1.0 MPa max and -5 to 70 C rating are identical across bowl materials. This model has an automatic drain for unattended wet lines, omits the mounting bracket for panel-mount installations, and includes the reverse-flow (reflux) valve as an ordering difference. The L-type regulator tops out at 0.4 MPa, so confirm your machine never needs more than that before selecting it. If oil is needed downstream, order the matching GAFC400-15 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated 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 GAFR400C15ALJK FAQ
The GAFR400C15ALJK is a filter and regulator with a 1/2in port, a metal bowl, and a 40 um element. Its pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C, the drain bowl holds 100 cc, and the unit weighs 880 g. It has an automatic drain, no mounting bracket, a fitted gauge with MPa/psi scale, and a reverse-flow (reflux) valve.
The L in the code means lower pressure, so this unit regulates from 0.15 to 0.4 MPa instead of the standard 0.15-0.9 MPa range. The K indicates a reverse-flow (reflux) valve is fitted, which is an ordering difference from the standard model. The reflux valve's function is detailed in the catalogue's separate page; it is not explained in our data. If your application needs a higher regulated pressure, choose a standard-type GAFR400 instead.
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