Airtac GAFR Adjustable Filter Regulator GAFR500C20L
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20L 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20L
The GAFR500C20L is a filter and regulator combined in a single body, handling both filtration and pressure control for a 3/4in air line. It operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi) and comes with a 40 um filter element.
This unit's metal bowl holds 108 cc of condensate, and its 950 g mass indicates a substantial size class that needs a proper panel mount rather than tubing support. The integrated circular gauge shows the outlet pressure on an MPa/psi scale, and the balanced regulator mechanism keeps the set pressure stable as supply varies.
Airtac GAFR Adjustable Filter Regulator GAFR500C20L Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20L |
|---|---|
| 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 | Semi-auto drain + manual 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 GAFR500C20L
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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 GAFR500C20L Is Used
Machine Header Feed
Feed a 3/4in header serving multiple pneumatic actuators on a production machine, with the lower pressure range protecting sensitive downstream components from over-pressurization.
Low-Pressure Assembly Station
Supply a regulated 0.15-0.4 MPa output to an assembly station using delicate grippers or vacuum generators that must not see higher pressures.
Paint or Coating Line
Provide clean, low-pressure air to a paint spray booth where consistent 20-58 psi output is critical for even coating, while the filter removes water and solids from the supply.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20L the Right Air-Prep Unit?
Choose the GAFR500 body when you need 3/4in ports and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet; it sits above the GAFR400 (7000 L/min at 0.7 MPa inlet) for larger distribution duties. The metal bowl suits demanding environments, but confirm compatibility for aggressive surroundings since no chemical data is printed. This model includes the mounting bracket and a fitted gauge, with a semi-auto plus manual drain for flexible condensate removal. The L type tops out at 0.4 MPa, so if the machine may ever need more pressure, select the standard S version instead. For lines requiring oil downstream, order the matching GAFC500-20 combination which adds a lubricator. 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 GAFR500C20L FAQ
The GAFR500C20L is a filter & regulator with a 3/4in port, operating at 0.15-0.4 MPa (20-58 psi) with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). It works in temperatures from -5 to 70 C, has a 108 cc metal drain bowl, and weighs 950 g. The unit comes with a 40 um element, a fitted gauge, and a semi-auto plus manual drain.
The L indicates the lower-pressure type, which regulates from 0.15 to 0.4 MPa (20-58 psi) instead of the standard 0.15-0.9 MPa range. This is suitable for applications needing a limited, precise low-pressure output. If your system might require higher pressure later, the standard S type would be the safer choice.
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