Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK 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 materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK
The GAFR500C20ALNWK is a filter and pressure regulator combined into a single body, eliminating the need for separate units. This 3/4in version handles a lower pressure band of 0.15-0.4 MPa (20-58 psi) and uses a 5 um element to trap fine particles.
Its metal bowl holds 108 cc of condensate, and the automatic drain clears water without manual attention. The unit weighs 950 g, and the balanced regulator mechanism helps maintain a steady outlet as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK |
|---|---|
| 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 | 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 | 108 cc |
| Bracket | Included |
| Weight | 950 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. No gauge is supplied with this model — the gauge connection on a GAFR500 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK
| GAFR500 | GA500 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). |
| 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| 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 GAFR500C20ALNWK Is Used
Precision Assembly Stations
Feed a 3/4in line to a precision assembly station where a stable 0.15-0.4 MPa supply is critical. The 5 um element protects sensitive tooling from fine particulates.
Machine Tool Headers
Mount this on a machine tool header to filter and regulate air for multiple actuators. The 108 cc metal bowl and automatic drain reduce maintenance stops on continuous runs.
Test and Calibration Rigs
Use in a test rig where a controlled lower pressure range is required. The self-locking knob resists drift from vibration, keeping the set pressure stable during long tests.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNWK the Right Air-Prep Unit?
Choose this GAFR500 for a 3/4in line needing filtration and regulation in one compact package. The metal bowl suits demanding environments, while the 5 um element provides finer filtration than the standard 40 um. This model includes the mounting bracket but omits the gauge, so plan to add one via the 1/4in connection if you need to read pressure.
The automatic drain (A) handles condensate removal automatically, and the lower-pressure type (L) caps output at 0.4 MPa. The reverse-flow valve (K) is fitted as an ordering difference. For lubrication downstream, order the matching GAFC500-20 combination instead. Note that 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the 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 GAFR500C20ALNWK FAQ
This filter & regulator has a 3/4in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), a max pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C, has a 108 cc metal drain bowl, and weighs 950 g. The element is 5 um, and the drain is automatic.
The 'L' code sets the lower pressure range (0.15-0.4 MPa), which is suitable for applications needing a reduced, stable output. The 'N' code means no gauge is supplied; the 1/4in gauge connection is available if you add one later. This model also includes a reverse-flow valve (K), which is an ordering difference from standard units.
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