Airtac GAFR Adjustable Filter Regulator GAFR500C20LNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20LNK 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 GAFR500C20LNK
The GAFR500C20LNK is a filter and regulator combined into one body, so a single unit both cleans the air and sets a steady outlet pressure. This model uses a 3/4in port, a metal bowl, and a 40 um element, with a lower pressure range of 0.15-0.4 MPa (20-58 psi).
A diversion structure spins the incoming air to separate liquid water and solid particles into the 108 cc drain bowl, while the balanced regulator holds the set pressure as supply varies. The pressed-in self-locking knob resists drift from vibration, and the metal bowl suits demanding environments-confirm compatibility for aggressive surroundings.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20LNK |
|---|---|
| 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 GAFR500C20LNK
| 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. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFR500C20LNK Is Used
Machine header feed
Feed a 3/4in machine header that supplies several pneumatic actuators, where a steady lower pressure of 0.15-0.4 MPa is required and the metal bowl handles the environment.
Low-pressure process line
Use on a process line that operates at a fixed low pressure, such as 0.3 MPa, where the L-type regulator's 0.4 MPa ceiling prevents accidental over-pressurization of sensitive equipment.
Multi-station assembly
Mount on a multi-station assembly bench where each station needs filtered air at a consistent low pressure, and the 108 cc drain bowl reduces how often an operator must check condensate.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20LNK the Right Air-Prep Unit?
Choose the GAFR500 body when you need a 3/4in port and a 950 g unit that handles a flow envelope plotted to 8000 L/min at 0.7 MPa inlet. The metal bowl (C) is the only option for this size, and the semi-auto plus manual drain means you can either let it purge automatically or drain it by hand. The L type tops out at 0.4 MPa, so if your machine may ever need more pressure, select the standard S type instead. A mounting bracket is included, but no gauge is fitted-the 1/4in gauge connection is ready if you add one later. The 40 um element is the standard grade, and the PT thread matches the MPa/psi gauge scale. This unit also includes the reverse-flow (reflux) valve as an ordering difference. If you need lubrication downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom 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 GAFR500C20LNK FAQ
The GAFR500C20LNK is a filter & regulator with a 3/4in port, a 40 um element, and a metal bowl. The lower pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 108 cc and the unit weighs 950 g. It has a semi-auto plus manual drain, no gauge (1/4in connection), and includes the reverse-flow valve.
The L in the code means lower pressure, so this unit regulates from 0.15 to 0.4 MPa instead of the standard 0.15-0.9 MPa. The N after the port code means no gauge is supplied, leaving a 1/4in connection if you want to add one. This combination suits applications that need a fixed low pressure and where the operator reads pressure from a line gauge rather than a local one.
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