Airtac GAFR Adjustable Filter Regulator GAFR500C20LW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20LW 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 5 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 grade5 µm
- Bowl materialMetal
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20LW
The GAFR500C20LW is a filter and pressure regulator combined into a single 3/4in body, so incoming air is spun to separate liquid water and trap solid particles before a balanced regulator sets a steady outlet pressure. This metal-bowl unit weighs 950 g and carries a 5 um element for finer filtration.
Its lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), making it suitable for gentle downstream circuits. Because the filter and regulator share one housing, this single component replaces what would otherwise be two separate units, reducing potential leak points and saving space on the rail.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20LW |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 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 GAFR500C20LW
| 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. |
| W | Filtering grade 5 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 GAFR500C20LW Is Used
Low-pressure precision circuits
Feed a sensitive indexing table or a light press that must never see more than 0.4 MPa, with the 5 um element protecting fine orifices from particle wear.
Machine tool coolant lines
Regulate air to a coolant mixing valve on a machining center, where the metal bowl resists shop-floor splashes and the 108 cc bowl handles condensate between shifts.
Test rig air supply
Provide a stable low-pressure air source to a benchtop calibration fixture, where the balanced regulator holds the setpoint as the shop supply fluctuates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20LW the Right Air-Prep Unit?
Choose the GAFR500 body when you need a 3/4in port and the 108 cc metal condensate bowl that supports longer intervals between draining. The included mounting bracket suits a 950 g unit that should be panel or frame mounted rather than supported by tubing. This model carries the 5 um element for finer particle removal, and the semi-auto plus manual drain gives you both automatic condensate release and a manual override. The lower-pressure type tops out at 0.4 MPa, so confirm your circuit never requires more. The fitted circular gauge reads in MPa/psi on the PT thread. If oil is needed downstream, order the matching GAFC500-20 combination instead. A 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 GAFR500C20LW FAQ
It is a filter & regulator with a 3/4in port, regulating from 0.15 to 0.4 MPa (20-58 psi). Maximum pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The metal condensate bowl holds 108 cc and the unit weighs 950 g.
The L type is designed for circuits that must not exceed 0.4 MPa, offering finer adjustment within that band. If your machine may ever need more than 0.4 MPa, the standard S type (0.15-0.9 MPa) would be the correct choice.
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