Airtac GAFR Adjustable Filter Regulator GAFR50020ASN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ASN 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 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialPC
- Drainautomatic
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ASN
The GAFR50020ASN is a filter and regulator combined into a single body, eliminating the need for separate filter and regulator units. It handles 3/4in ports and delivers a regulated output from 0.15 to 0.9 MPa (20-130 psi) while filtering incoming air to 40 um.
Its balanced regulator mechanism keeps outlet pressure steady as supply varies, and the pressed-in self-locking knob resists drift from vibration. The 950 g body with a 108 cc condensate bowl is built for machine headers or multi-station lines where a compact, integrated air prep point is needed.
Airtac GAFR Adjustable Filter Regulator GAFR50020ASN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ASN |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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. 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 GAFR50020ASN
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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 GAFR50020ASN Is Used
Machine header supply
Feed a 3/4in header serving multiple pneumatic actuators on a production machine, with the automatic drain handling condensate continuously.
Multi-station assembly line
Provide filtered, regulated air to a series of workstations on a conveyor line, where stable pressure is critical for consistent operation.
Packaging equipment
Supply clean, regulated air to packaging machinery that uses air cylinders and valves, ensuring reliable cycling without pressure fluctuation.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ASN the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in lines that need a single-unit filter and regulator. The automatic drain (A) handles condensate without manual attention, ideal for wet or unattended lines. The included mounting bracket simplifies panel installation, while the 40 um element handles general shop air. For finer filtration, select the W option for a 5 um element. The absence of a gauge (N) means you'll need to add one via the 1/4in gauge connection to monitor set pressure. If downstream lubrication is required, order the GAFC500-20 combination instead. Note that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 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 GAFR50020ASN FAQ
The GAFR50020ASN is a filter & regulator with a 3/4in port. Pressure range is 0.15-0.9 MPa (20-130 psi), max pressure is 1.0 MPa (145 psi), and proof pressure is 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 108 cc drain bowl and weighs 950 g.
The N code means no gauge is supplied. The GAFR500 has a 1/4in gauge connection, so you can add a compatible gauge later to monitor the outlet pressure. This is useful if you already have a preferred gauge or are panel-mounting where a gauge is not needed.
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