Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNWK 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 gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNWK
The GAFR500N20ALNWK is a filter and pressure regulator combined into a single body, so one compact unit cleans the air and stabilizes outlet pressure. This 3/4in version operates in the lower 0.15-0.4 MPa (20-58 psi) band and uses a 5 um element to trap fine particles.
The nylon bowl collects condensate and solids separated by the internal diversion structure, while the automatic drain clears it without manual attention. Weighing 950 g, this GAFR500 body is a substantial component that needs proper panel or frame support rather than hanging from tubing.
Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNWK |
|---|---|
| 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. 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 GAFR500N20ALNWK
| 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. |
| 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 GAFR500N20ALNWK Is Used
Machine header feed
Feed a 3/4in header supplying multiple pneumatic actuators on a production machine, with the 5 um element protecting sensitive valves and the automatic drain handling condensate without operator rounds.
Instrument air drop
Provide filtered, regulated air at up to 0.4 MPa to precision instruments or gauging stations where fine particle removal matters and supply pressure stays within the lower band.
Multi-station assembly line
Mount this 950 g unit on a central panel to serve a multi-station assembly line, using the 108 cc bowl to reduce drain frequency and the included bracket for secure installation.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNWK the Right Air-Prep Unit?
Choose the GAFR500 when you need a 3/4in port with a 108 cc condensate bowl, stepping up from the GAFR400's 100 cc capacity for longer intervals between drains. The nylon bowl suits applications where a transparent PC bowl is not preferred, though the same 1.0 MPa (145 psi) maximum applies to all bowl materials. This model includes the mounting bracket, has no gauge (the 1/4in gauge connection is ready for an add-on), and the 5 um element filters finer than the standard 40 um grade. The automatic drain handles wet or unattended lines, and the reverse-flow (reflux) valve is fitted as an ordering difference. If oil is needed downstream, order the matching GAFC500-20 combination instead. Max supply 1.0 MPa leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan inlet pressure near 1.0 MPa to reach the full regulated band.
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 GAFR500N20ALNWK FAQ
This filter & regulator has a 3/4in port, a lower pressure range of 0.15-0.4 MPa (20-58 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The nylon bowl holds 108 cc of condensate, the unit weighs 950 g, and the 5 um element filters fine particles.
The N code after the port means no gauge is supplied with this GAFR500N20ALNWK. The 1/4in gauge connection is present on the body, so you can add a compatible AirTAC gauge later. Without a gauge, the set pressure cannot be read directly on the unit.
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Covers non-human-caused product damage.
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