Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK 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 3/4" 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 size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK
The GAFR500N20ALWK is a filter & regulator with both functions in a single body - no separate filter and regulator to plumb, and no lubricator anywhere in the unit. It handles a 3/4in port, carries a 5 um element, and regulates from 0.15 to 0.4 MPa (20-58 psi), with the circular gauge showing MPa/psi.
The nylon bowl collects 108 cc of condensate, and the automatic drain clears it without manual attention. Weighing 950 g, this size class needs a proper panel or frame mount rather than support from the tubing - a step up from the 500 g GAFR300 body.
Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | Nylon |
| 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 | 108 cc |
| Bracket | Included |
| Weight | 950 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 GAFR500N20ALWK
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| 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 GAFC500-20 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 | GAFR500 · 3/4" · curve to 8000 L/min |
|---|---|
| One size down | GAFR400 |
| One size up | GAFR600 (curve to 12000 L/min) |
| Add a lubricator | GAFC500-20 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that need clean, regulated air at a steady lower pressure, with the 5 um element protecting fine internal passages.
Machine header supply
Mount on a machine header feeding multiple actuators where the 3/4in port and 108 cc bowl handle moderate condensate loads, and the automatic drain runs unattended.
Lower-pressure test rig
Use in a test rig that must stay within a 0.15-0.4 MPa band, where the L-type regulator and the 8000 L/min plotted envelope at 0.7 MPa inlet give a clear sizing reference.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK the Right Air-Prep Unit?
Choose the GAFR500 body when a 3/4in port and a 108 cc drain bowl fit your line; the 5 um element traps finer particles than the standard 40 um, useful for precision valves, though it will need more frequent service. The automatic drain suits wet or unattended lines, while the nylon bowl is a build choice - confirm compatibility for aggressive surroundings. The mounting bracket is included, the gauge is fitted with a PT thread and MPa/psi scale, and the reverse-flow (reflux) valve is attached as an ordering difference. If oil is needed downstream, order the matching GAFC500-20 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 lower-pressure range.
Quick checklist
- ✓ Body size for your peak flow (3/4" 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 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 950 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 GAFC500-20 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR500N20ALWK FAQ
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 and must not freeze. The drain bowl holds 108 cc and the unit weighs 950 g.
The K code indicates a reverse-flow (reflux) valve is fitted. It is an ordering difference only - the catalogue defers its function to another page, so no operational detail is provided here.
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Covers non-human-caused product damage.
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