Airtac GAFR Adjustable Filter Regulator GAFR500N20AL
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500N20AL 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 gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500N20AL
The GAFR500N20AL is a filter and regulator combined in a single body, handling both filtration and pressure control without a separate lubricator. It uses a diversion structure that spins incoming air to separate liquid water and solid particles into the 108 cc condensate bowl, while the balanced regulator holds the outlet steady as supply pressure varies.
This model has a 3/4in port, a lower-pressure range of 0.15-0.4 MPa (20-58 psi), and a 40 um element. The nylon bowl and automatic drain suit installations where regular manual draining is impractical, and the included mounting bracket supports the 950 g body on a panel or frame.
Airtac GAFR Adjustable Filter Regulator GAFR500N20AL Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500N20AL |
|---|---|
| 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR500N20AL
| 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. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR500N20AL Is Used
Machine headers
Feed a 3/4in header serving several pneumatic actuators on a single machine, where the lower pressure range protects sensitive downstream components.
Conveyor zones
Regulate air for conveyor zone control valves that operate at moderate pressure, with the automatic drain handling condensate in humid production areas.
Test benches
Supply a consistent 0.15-0.4 MPa output to test fixtures and gauging equipment, where the balanced regulator maintains set pressure as supply fluctuates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500N20AL the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in lines that need filtration and regulation in one unit; it is the mid-large size in the GAFR family, with a flow curve plotted to 8000 L/min at 0.7 MPa inlet, above the GAFR400's 7000 L/min envelope. The nylon bowl is a build choice with the same 1.0 MPa maximum and -5 to 70 C rating as PC or metal, so confirm compatibility for aggressive surroundings. The automatic drain handles condensate without manual attention, while the standard type would offer a wider 0.15-0.9 MPa range if higher outlet pressure is ever needed. The bracket is included, the gauge is fitted with an MPa/psi scale, and the 40 um element is the standard grade. If oil is needed downstream, order the matching GAFC500-20 combination instead. 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 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 GAFR500N20AL FAQ
The GAFR500N20AL is a filter and regulator with a 3/4in port, 0.15-0.4 MPa (20-58 psi) working range, 1.0 MPa (145 psi) maximum pressure, and 1.5 MPa (215 psi) proof pressure. It operates from -5 to 70 C, has a 108 cc drain bowl, and weighs 950 g. The 40 um element filters solids and water, and the automatic drain clears condensate.
The L type limits the regulated output to 0.15-0.4 MPa (20-58 psi), compared to the standard type's 0.15-0.9 MPa range. This suits applications that must never exceed 0.4 MPa, but if your machine may need higher pressure later, the standard type is the safer choice.
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