Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNK 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 40 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 grade40 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNK
The GAFR500N20ALNK is a filter and regulator combined in one body, handling both filtration and pressure control without a separate lubricator. It uses a diversion structure to spin the air, separating liquid water and solid particles into the 108 cc nylon condensate bowl, while the balanced regulator holds the outlet steady as supply pressure varies. This model operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi) and comes with a 40 um element.
With a 3/4in port and a 950 g mass, this unit belongs to the GAFR500 size class, which is built for larger branch lines feeding multiple actuators or a small machine header. The pressed-in self-locking knob resists set-pressure drift from vibration, and the automatic drain clears condensate without manual intervention. The gauge connection is 1/4in if a gauge is added later, and the reverse-flow (reflux) valve is fitted as an ordering difference.
Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNK |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 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 GAFR500N20ALNK
| 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. |
| (blank) | Filtering grade 40 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 GAFR500N20ALNK Is Used
Machine header feed
Feed a 3/4in header that supplies several pneumatic cylinders on a single machine, where the lower pressure range protects sensitive actuators and the automatic drain handles condensate without stopping production.
Low-pressure instrument line
Supply a 0.15-0.4 MPa regulated air to precision valves or gauges in a test rig, where the balanced regulator keeps the outlet stable as the shop supply fluctuates.
Multi-station assembly bench
Run a multi-station assembly bench with several work fixtures, using the 108 cc bowl to cut drain checks and the self-locking knob to hold the setpoint despite nearby vibration.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20ALNK the Right Air-Prep Unit?
Choose the GAFR500 body when your line needs 3/4in ports and a higher condensate capacity than the GAFR400's 100 cc bowl; the 108 cc bowl here reduces drain frequency on wet lines. The nylon bowl is a build choice, and the automatic drain suits unattended operation. The L type tops out at 0.4 MPa, so confirm your machine never needs more than that; if it does, select the standard S type instead. The mounting bracket is included, no gauge is fitted (connection is 1/4in), and the element is 40 um. The PT thread matches the MPa/psi gauge scale, and the reflux valve is present. If oil is needed downstream, order the matching GAFC500-20 combination, which adds a lubricator. With a 1.0 MPa max supply, this unit leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan the inlet pressure accordingly.
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 GAFR500N20ALNK FAQ
The GAFR500N20ALNK is a filter and regulator with a 3/4in port, working pressure range of 0.15-0.4 MPa (20-58 psi), maximum pressure of 1.0 MPa (145 psi), and proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 108 cc, the unit weighs 950 g, and the flow curve is plotted to 8000 L/min at 0.7 MPa inlet.
The K code indicates the reverse-flow (reflux) valve is fitted. It is an ordering difference from models without the K code, and its function is detailed in the catalogue. This unit also has an automatic drain and a nylon bowl, with no gauge supplied.
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