Airtac GAFR Adjustable Filter Regulator GAFR50020ALNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ALNW 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 gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ALNW
The GAFR50020ALNW is a filter and pressure regulator combined into a single body, so incoming air is spun to separate liquid water and solid particles before the balanced regulator sets a steady outlet pressure. This 3/4in unit operates in the lower-pressure band of 0.15-0.4 MPa (20-58 psi) and comes with a 5 um element for finer filtration.
With no gauge fitted, the 1/4in gauge connection is ready for a later addition, and the automatic drain clears the 108 cc condensate bowl without manual attention. At 950 g, this size class needs proper panel or frame mounting rather than support from the tubing alone.
Airtac GAFR Adjustable Filter Regulator GAFR50020ALNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ALNW |
|---|---|
| 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. 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 GAFR50020ALNW
| 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| W | Filtering grade 5 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 GAFR50020ALNW Is Used
Machine header supply
Feed a 3/4in header serving multiple pneumatic stations where the lower 0.4 MPa ceiling is acceptable and a 5 um element protects sensitive valves downstream.
Instrument air pre-filter
Use the 5 um element ahead of precision instruments or pilot valves that need finer particle removal, with the automatic drain keeping the 108 cc bowl clear in continuous operation.
Unattended wet line
Install on a wet or remote line where the automatic drain removes condensate without manual checks, and the included bracket secures the 950 g unit to a frame.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ALNW the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in lines where a 108 cc drain bowl and an 8000 L/min flow envelope at 0.7 MPa inlet suit a machine header or multi-station line. The L type caps the regulated output at 0.4 MPa, so confirm your actuators never need more; the 5 um element traps finer particles than the standard 40 um grade, at the cost of more frequent element service. The automatic drain handles wet or unattended lines, the mounting bracket is included, and the PT thread carries a MPa/psi gauge scale if you add a gauge later. If oil is needed downstream, order the matching GAFC500-20 combination instead of expecting this unit to lubricate. 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 GAFR50020ALNW FAQ
The GAFR50020ALNW is a filter & regulator with a 3/4in port, working pressure range of 0.15-0.4 MPa (20-58 psi), max pressure of 1.0 MPa (145 psi), proof pressure of 1.5 MPa (215 psi), and temperature range of -5 to 70 C. It has a 5 um element, automatic drain, 108 cc drain bowl, and weighs 950 g.
The L code sets the lower-pressure type, which tops out at 0.4 MPa (58 psi) instead of the standard 0.9 MPa, making it suitable for applications that never need higher output. The N code after the port means no gauge is supplied; the 1/4in gauge connection is present if you add one later, and the PT thread determines the MPa/psi scale.
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