Airtac GAFR Adjustable Filter Regulator GAFR500C20ALJNWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20ALJNWK 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 GAFR500C20ALJNWK
The GAFR500C20ALJNWK is a combined filter and regulator in a single body, removing water and solid particles while holding a steady 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 for finer filtration.
Its metal bowl and automatic drain suit industrial lines where condensate accumulates quickly. At 950 g, this unit needs proper panel or frame mounting rather than support from the tubing alone.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ALJNWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20ALJNWK |
|---|---|
| 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 | 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 GAFR500C20ALJNWK
| 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). |
| 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 GAFR500C20ALJNWK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require clean, regulated air at moderate pressure. The 5 um element protects sensitive internal components.
Machine header supply
Mount on a machine header serving multiple actuators. The 108 cc metal bowl and automatic drain handle condensate without frequent manual checks.
Instrument air feed
Supply instrument air to gauges or sensors where consistent lower pressure is critical. The balanced regulator holds the set point as supply varies.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20ALJNWK the Right Air-Prep Unit?
Choose this GAFR500 when you need 3/4in porting with a 108 cc metal bowl and automatic drain. The lower-pressure type tops out at 0.4 MPa, so confirm your system never requires more. The J code means no bracket is included; the N code means no gauge is fitted, though the 1/4in gauge connection is ready if you add one later. The 5 um element traps finer particles than the standard 40 um, and the K code adds a reverse-flow valve. For lines needing oil downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa above the 0.4 MPa top of this unit's 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 GAFR500C20ALJNWK FAQ
This filter & regulator has a 3/4in port, 0.15-0.4 MPa (20-58 psi) working range, 1.0 MPa (145 psi) max pressure, 1.5 MPa (215 psi) proof pressure, and -5 to 70 C temperature range. The metal drain bowl holds 108 cc, and the unit weighs 950 g.
The N code means no gauge is supplied, so you cannot read the set pressure without adding one to the 1/4in connection. The J code omits the mounting bracket, which suits panel-mount installations or setups where you already have a bracket in place.
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