Airtac GAFR Adjustable Filter Regulator GAFR500C20ASN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20ASN 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 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20ASN
The GAFR500C20ASN is a filter and regulator combined in a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. This 3/4in version handles 0.15-0.9 MPa (20-130 psi) and uses a 40 um element to trap solids and spun-out water droplets in its metal bowl.
The metal bowl holds 108 cc of condensate, and the automatic drain clears it without manual attention. Weighing 950 g, this unit suits fixed installations where the piping provides support rather than relying on flexible tubing. The balanced regulator mechanism keeps the set pressure steady as supply varies, and the self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ASN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20ASN |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 GAFR500C20ASN
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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. |
| (blank) | No reverse-flow valve. |
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 GAFR500C20ASN Is Used
Machine header supply
Feed a multi-station machine header with clean, regulated air at 3/4in port size. The 108 cc bowl and automatic drain handle condensate from continuous operation without manual intervention.
Assembly line stations
Supply consistent pressure to multiple assembly fixtures where tools need stable inlet conditions. The self-locking knob keeps the setpoint steady despite nearby equipment vibration.
Plant air drops
Install at plant air drop points where a single unit must filter and regulate for downstream equipment. The metal bowl suits industrial environments, and the 1/4in gauge connection allows local pressure monitoring.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20ASN the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in lines where you need both filtration and pressure control in one compact package. The metal bowl (C) is the only option for this body, and the automatic drain (A) handles wet or unattended lines without manual checks. The standard pressure type (S) covers 0.15-0.9 MPa, the mounting bracket is included, and the 40 um element suits general shop air. No gauge is fitted (N), but the 1/4in gauge connection allows adding one later. If you need finer filtration, the 5 um element is available as an option, and the PT thread matches standard pipe fittings. For lines that need lubrication downstream, order the matching GAFC500-20 combination instead. The 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 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 GAFR500C20ASN FAQ
The GAFR500C20ASN has a 3/4in port, 0.15-0.9 MPa (20-130 psi) working range, 1.0 MPa (145 psi) max pressure, 1.5 MPa (215 psi) proof pressure, and operates from -5 to 70 C. The metal 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. It uses a 40 um element and has an automatic drain.
The GAFR500C20ASN combines both functions in one body, so it filters and regulates in a single unit. A GAF only filters, while a GAR only regulates. This model also has an automatic drain and no gauge, so you would add a gauge to the 1/4in connection if you need to read outlet pressure.
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