Airtac GAFR Adjustable Filter Regulator GAFR400C15ALWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15ALWK 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 GAFR400C15ALWK
The GAFR400C15ALWK is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing a separate filter and regulator pair. This model uses a 1/2in port, a metal bowl, a 5 um element, and an automatic drain, with a lower-pressure range of 0.15-0.4 MPa (20-58 psi).
The diversion structure spins the air to separate liquid water and solid particles into the 100 cc drain bowl, while the balanced regulator holds the set pressure steady as supply varies. The pressed-in self-locking knob resists drift from vibration, and the circular gauge with clip and magnifier shows the MPa/psi scale. There is no lubricator in this unit, and it has only one bowl for condensate.
Airtac GAFR Adjustable Filter Regulator GAFR400C15ALWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15ALWK |
|---|---|
| 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 | 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 GAFR400C15ALWK
| 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). |
| (blank) | Mounting bracket included. |
| (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 GAFR400C15ALWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves on a machine tool with clean, regulated air at a stable lower pressure, using the 5 um element to protect fine internal passages.
Assembly line automation
Supply a multi-station assembly line where consistent lower pressure is critical for delicate operations like part placement or adhesive application, with the automatic drain reducing maintenance.
Instrument air supply
Protect sensitive instruments or gauges from water and fine particles with the 5 um filter element, while the regulator keeps the supply within a safe lower range.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALWK the Right Air-Prep Unit?
Choose the GAFR400 body for a 1/2in port and a 100 cc drain bowl, which holds about 1.7 times the condensate of a GAFR300's 60 cc bowl, meaning less frequent draining on a busy line. The metal bowl is a build choice for environments where you need extra durability, though the common specification of 1.0 MPa max and -5 to 70 C applies to all bowl materials, so confirm compatibility for aggressive surroundings. The automatic drain handles condensate without manual attention, ideal for wet or unattended lines. The L type tops out at 0.4 MPa, so if your machine may ever need more pressure, this is the wrong part. The mounting bracket is included, and the 5 um element traps finer particles than the standard 40 um, but will need more frequent service. The PT thread gives an MPa/psi gauge scale, and the reverse-flow valve is fitted as an ordering difference. If you need lubrication 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 GAFR400C15ALWK FAQ
The GAFR400C15ALWK operates from 0.15-0.4 MPa (20-58 psi) with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C and it must not freeze. The drain bowl capacity is 100 cc and the unit weighs 880 g. It has a 1/2in port and a 5 um filter element.
The 'L' indicates a lower-pressure regulator type, with a working range of 0.15-0.4 MPa (20-58 psi) instead of the standard 0.15-0.9 MPa. This is suitable for applications that only need a low, stable pressure. The GAFR600 body does not offer this option.
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