Airtac GAFR Adjustable Filter Regulator GAFR50020ALWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ALWK 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 materialPC
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ALWK
The GAFR50020ALWK is a filter and regulator combined in a single body, so it cleans incoming air and sets a steady outlet pressure without needing separate filter and regulator units. This lower-pressure version regulates from 0.15 to 0.4 MPa (20-58 psi), uses a 5 um element, and has an automatic drain that clears condensate without manual attention.
Its 3/4in port and 950 g mass place it in the GAFR500 size class, and the 108 cc drain bowl is the service interval driver. A reverse-flow (reflux) valve is fitted, and the circular gauge with MPa/psi scale is included, so the set pressure is always visible.
Airtac GAFR Adjustable Filter Regulator GAFR50020ALWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ALWK |
|---|---|
| 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 | PC |
| Drain type | Automatic 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 GAFR50020ALWK
| 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". |
| A | Drain: Automatic 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. |
| 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 GAFR50020ALWK Is Used
Machine header supply
Feed a 3/4in machine header that serves multiple pneumatic actuators, where the 5 um element protects sensitive control valves and the automatic drain handles condensate without daily checks.
Instrument air for gauges
Supply a panel of pressure gauges and transducers that need clean, regulated air at a stable lower pressure, with the included gauge confirming the setpoint at a glance.
Multi-station assembly line
Regulate air for a multi-station conveyor line where the 8000 L/min envelope at 0.7 MPa inlet supports several workstations, and the 108 cc bowl reduces how often the line stops for draining.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ALWK the Right Air-Prep Unit?
Choose the GAFR500 body when you need a 3/4in port and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet; it is a step up from the GAFR400's 7000 L/min envelope if you are feeding a larger header. The PC bowl suits general-purpose lines, and the automatic drain is for unattended operation or wet supply air. The 5 um element traps finer particles than the standard 40 um, which helps precision valves but needs more frequent service. The included bracket simplifies panel mounting, and the PT thread means the gauge reads MPa/psi. If oil is needed downstream, order the matching GAFC500-20 combination instead. 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 GAFR50020ALWK FAQ
The GAFR50020ALWK is a filter & regulator with a 3/4in port, a working pressure range of 0.15-0.4 MPa (20-58 psi), 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 element is 5 um, the drain is automatic, and a circular gauge with MPa/psi scale is fitted.
The K code indicates a reverse-flow (reflux) valve is fitted. It is an ordering difference from models without the K code; the catalogue defers its function to a separate page, so confirm the operational details from the datasheet if needed.
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