Airtac GAFR Adjustable Filter Regulator GAFR500C20LN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20LN 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 gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20LN
The GAFR500C20LN is a filter and regulator combined in a single body. It spins incoming air to separate liquid water and trap solid particles, then delivers a steady outlet pressure through its balanced, self-locking regulator. This unit has a 3/4in port, a 40 um element, and a metal condensate bowl, with no lubricator function.
Its lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi). The metal bowl holds 108 cc of condensate, and the whole unit weighs 950 g, placing it in the mid-large size class. The gauge connection is 1/4in if a gauge is added later.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20LN |
|---|---|
| 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. 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 GAFR500C20LN
| 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. |
| 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 GAFR500C20LN Is Used
Machine header supply
Feed a single machine header or a small bank of pneumatic actuators where a steady, lower pressure is required and a 3/4in port matches the distribution line.
Process control panel
Mount in a control panel to supply instrument air at a stable lower pressure, protecting sensitive valves from supply fluctuations and removing water and particles.
Assembly station air
Provide filtered, regulated air to an assembly station's tooling and workholding devices, with the metal bowl handling condensate in a busy production area.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20LN the Right Air-Prep Unit?
Choose this GAFR500 if your line needs a 3/4in port and a lower regulated pressure band. The metal bowl suits demanding environments, while the included mounting bracket supports the 950 g body. The semi-auto and manual drains are both fitted, and the 40 um element handles standard filtration. If you need finer filtration, the W option provides a 5 um element. For lubrication downstream, order the matching GAFC500-20 combination instead. Note that with a 1.0 MPa max supply, you have about 0.6 MPa above the 0.4 MPa top of this unit's regulated 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 GAFR500C20LN FAQ
The GAFR500C20LN is a filter and regulator with a 3/4in port. Its pressure range is 0.15-0.4 MPa (20-58 psi), with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C, has a 108 cc drain bowl, and weighs 950 g.
The L type limits regulation to a maximum of 0.4 MPa (58 psi), suitable for applications needing a lower, stable pressure. If your system requires more than 0.4 MPa, this is not the correct version; the standard type regulates up to 0.9 MPa.
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