Airtac GAFR Adjustable Filter Regulator GAFR50020LNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020LNW 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
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020LNW
The GAFR50020LNW is a filter and regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. It handles a 3/4in port and weighs 950 g, placing it in the mid-large size class for machine headers. This version uses a 5 um element to trap fine particles, and its lower-pressure range of 0.15-0.4 MPa (20-58 psi) suits delicate applications.
The unit's diversion structure spins incoming air to separate liquid water and solid debris into the 108 cc condensate bowl. The balanced regulator mechanism holds the set outlet pressure steady as supply pressure varies. With no gauge fitted, the 1/4in gauge connection allows for later installation if needed.
Airtac GAFR Adjustable Filter Regulator GAFR50020LNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020LNW |
|---|---|
| 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 | 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 GAFR50020LNW
| 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. |
| 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 GAFR50020LNW Is Used
Precision valve control
Feeds a bank of precision pneumatic valves on a packaging line where consistent low pressure is critical. The 5 um element protects fine orifices from particle wear.
Machine header supply
Mounts on a machine frame to supply a 3/4in header serving multiple actuators. The 108 cc bowl handles condensate from a full shift before needing a drain check.
Test bench air
Provides regulated low-pressure air to a calibration bench. The included bracket secures the 950 g unit to a panel, keeping tubing stress-free.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020LNW the Right Air-Prep Unit?
Choose the GAFR500 body for 3/4in piping with a flow envelope plotted to 8000 L/min at 0.7 MPa inlet, stepping down from the GAFR600's 12000 L/min envelope. The PC bowl suits standard shop air, while the 5 um element provides finer filtration than the standard 40 um for sensitive equipment. This model includes the mounting bracket and a semi-auto drain with manual override, which requires periodic checking. The L-type regulator caps at 0.4 MPa, so confirm your system never needs higher pressure. The PT thread option pairs with an MPa/psi gauge scale, though no gauge ships with this unit. For lines needing oil 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 GAFR50020LNW FAQ
Pressure range is 0.15-0.4 MPa (20-58 psi) for the L-type regulator. Maximum supply pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). Operating temperature is -5 to 70 C and must not freeze. The drain bowl holds 108 cc and the unit weighs 950 g with a 3/4in port.
The N code after the port means no gauge is supplied. The gauge connection on the GAFR500 body is 1/4in, so a standard 1/4in gauge can be added later if you need to read the set pressure directly. The PT thread option uses an MPa/psi scale.
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