Airtac GAFR Adjustable Filter Regulator GAFR50020LNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020LNK 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 materialPC
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020LNK
The GAFR50020LNK is a filter and regulator combined into a single body, eliminating the need for separate components. This 3/4in unit handles a lower pressure range of 0.15-0.4 MPa (20-58 psi) and includes a 40 um filter element to remove water and solid particles.
This 950 g body has a 108 cc condensate bowl and comes with the mounting bracket included. A reverse-flow valve is fitted, and the unit has no gauge, though the 1/4in gauge connection is available for adding one. It is rated for -5 to 70 C and must not freeze.
Airtac GAFR Adjustable Filter Regulator GAFR50020LNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020LNK |
|---|---|
| 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 | PC |
| 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 GAFR50020LNK
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. 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 GAFR50020LNK Is Used
Precision machining
Feed a 3/4in line to a precision machining center where stable, lower pressure is needed for fixtures or clamping. The 40 um element protects sensitive valves from particulate wear.
Assembly stations
Use on a multi-station assembly line where a single 3/4in feed supplies several pneumatic tools. The 108 cc bowl reduces drain frequency during continuous shifts.
Test benches
In a lab or test bench, this unit provides a clean, regulated air supply for experiments requiring a lower pressure band. The included bracket simplifies panel mounting.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020LNK the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in lines needing a compact, single-body solution. This L-type is limited to 0.4 MPa, so verify your supply stays below that ceiling. The PC bowl and 40 um element suit general-purpose lines, while the semi-auto+manual drain requires periodic attention. The included bracket aids mounting, and the K code adds a reverse-flow valve. For lubrication downstream, order the GAFC500-20 combination instead. With a 1.0 MPa max supply, 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 GAFR50020LNK FAQ
The GAFR50020LNK is a filter & regulator with a 3/4in port. Its 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 has a 108 cc drain bowl, weighing 950 g. It uses a 40 um element and has a semi-auto+manual drain.
The K code indicates a reverse-flow (reflux) valve is fitted to this unit. It is an ordering difference from standard models. The specific function is detailed in the full catalogue, but it does not change the filter or regulation capabilities of the GAFR50020LNK.
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