Airtac GAFR Adjustable Filter Regulator GAFR500N20ALJNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20ALJNWK 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 GAFR500N20ALJNWK
This AirTAC GAFR500N20ALJNWK is a filter and regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. It handles a 3/4in port with a lower pressure range of 0.15-0.4 MPa (20-58 psi) and uses a 5 um element for fine filtration.
The nylon bowl collects condensate from the diversion-style filter, which spins air to separate liquid water and solid particles. With an automatic drain, this 950 g unit is suited for installations where regular manual draining is impractical, and the 108 cc bowl provides ample capacity between service cycles.
Airtac GAFR Adjustable Filter Regulator GAFR500N20ALJNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20ALJNWK |
|---|---|
| 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 | Not included (J) |
| 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 GAFR500N20ALJNWK
| 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). |
| J | No bracket (J) — supplied without the mounting bracket. |
| 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 GAFR500N20ALJNWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require a stable, lower supply pressure. The 5 um element protects fine internals from particle wear, while the balanced regulator holds the setpoint as line pressure fluctuates.
Unattended machine station
Mount on a machine header where the automatic drain removes condensate without operator intervention. The nylon bowl is lighter than metal for overhead installations, and the 108 cc capacity extends time between maintenance checks.
Instrument air supply
Provide filtered, regulated air to sensitive instruments that cannot tolerate pressure above 0.4 MPa. The 5 um element captures fine particles, and the self-locking knob resists drift from machine vibration.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALJNWK the Right Air-Prep Unit?
Choose this GAFR500 for 3/4in lines needing fine 5 um filtration and a lower 0.15-0.4 MPa outlet range. The nylon bowl offers a lightweight alternative to metal, while the automatic drain handles wet or unattended lines. This model omits the mounting bracket (J) and gauge (N), so plan for panel mounting and note the 1/4in gauge connection if you add one later. The fitted reverse-flow valve is an ordering difference only. For lines needing lubrication 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 the regulated 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 GAFR500N20ALJNWK 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, has a 108 cc drain bowl, and weighs 950 g. The element is 5 um and the drain is automatic.
The 'N' after the port code means no gauge is supplied; the 1/4in gauge connection is available if you add one. The 'J' code means the mounting bracket is omitted, which suits installations using existing brackets or direct panel mounting. Both options reduce the initial part cost when they are not needed.
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