Airtac GAFR Adjustable Filter Regulator GAFR400C15ALW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15ALW 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 GAFR400C15ALW
The GAFR400C15ALW is a filter and regulator combined into one body, so it cleans incoming air and holds a steady outlet pressure without needing a separate filter plus regulator pair. This 1/2in version uses a lower-pressure regulator set for 0.15-0.4 MPa (20-58 psi) and a 5 um element that traps finer particles for sensitive equipment.
The metal bowl holds 100 cc of condensate, and the automatic drain clears it without manual attention. At 880 g, this unit is built for a proper panel or frame mount rather than support from the tubing, and the circular gauge with MPa/psi scale is fitted to show the set pressure at a glance.
Airtac GAFR Adjustable Filter Regulator GAFR400C15ALW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15ALW |
|---|---|
| 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 GAFR400C15ALW
| 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. |
| (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 GAFR400C15ALW Is Used
Precision valve control
Feed a bank of precision pneumatic valves that need clean, regulated air at a stable lower pressure. The 5 um element protects fine internal passages from particle wear.
Machine tool circuits
Supply a machining center's pilot air circuits where consistent 0.15-0.4 MPa pressure keeps tool clamps and workholding devices operating predictably through a shift.
Test bench air supply
Provide filtered air to a laboratory test bench with instruments that require a lower regulated pressure. The automatic drain keeps the 100 cc bowl from overflowing during long test runs.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALW the Right Air-Prep Unit?
Choose the GAFR400 body when you need 1/2in ports and a 100 cc drain bowl, stepping up from the GAFR300's 60 cc bowl if your line runs wetter. The metal bowl suits demanding environments, while the automatic drain handles unattended operation. The 5 um element filters finer than the standard 40 um but will need more frequent service. The included bracket simplifies mounting, and the PT thread carries an MPa/psi gauge scale. 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 this unit's 0.4 MPa regulated top.
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 GAFR400C15ALW FAQ
The GAFR400C15ALW is a filter & regulator with a 1/2in port, lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a maximum supply pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C. It has a 100 cc metal drain bowl, weighs 880 g, uses a 5 um element, and includes an automatic drain and a circular gauge with MPa/psi scale.
The L code specifies a lower-pressure regulator that tops out at 0.4 MPa (58 psi), which is about 44% of the standard type's 0.9 MPa ceiling. This is ideal for applications that only need modest pressure, but if your machine might ever require more than 0.4 MPa, the standard S type would be the correct choice.
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