Airtac GAFR Adjustable Filter Regulator GAFR500C20AL
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20AL 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 materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20AL
The GAFR500C20AL is a filter and regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. This metal-bowl version handles a 3/4in port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi) with a 40 um filter element.
Its diversion structure spins incoming air to separate liquid water and solid particles into the 108 cc condensate bowl. The balanced regulator mechanism holds the outlet pressure steady as supply pressure varies, while the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR500C20AL Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20AL |
|---|---|
| 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 | 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. 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 GAFR500C20AL
| 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). |
| (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 GAFR500C20AL Is Used
Machine header supply
Feed a 3/4in machine header serving multiple pneumatic actuators where a steady 0.15-0.4 MPa output is required and condensate can be auto-drained.
Low-pressure assembly stations
Supply sensitive assembly tools or delicate gripping systems that must not see pressure above 0.4 MPa, with filtration protecting downstream valves.
Multi-station transfer lines
Protect a multi-station transfer line with a single filter-regulator point, using the automatic drain to handle continuous moisture load without manual checks.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20AL the Right Air-Prep Unit?
Choose the GAFR500 body for a 3/4in port with a flow curve plotted to 8000 L/min at 0.7 MPa inlet, stepping up from the GAFR400's 7000 L/min envelope. The metal bowl (C) suits demanding environments, and the automatic drain (A) handles unattended operation or wet lines. This lower-pressure (L) type tops out at 0.4 MPa, so confirm your system never needs more. The mounting bracket is included, and the fitted gauge reads in MPa/psi. If you need lubrication downstream, order the matching GAFC500-20 combination instead. Note that 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 GAFR500C20AL FAQ
The GAFR500C20AL is a filter & regulator with a 3/4in port, lower pressure range of 0.15-0.4 MPa (20-58 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 40 um element, automatic drain, 108 cc drain bowl, and 950 g weight.
The C code specifies a metal bowl, which is a build choice for the environment; the A code specifies an automatic drain that expels condensate without manual intervention. This combination suits unattended or continuously wet lines where regular manual draining is impractical.
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