Airtac GAFR Adjustable Filter Regulator GAFR500C20LJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20LJ 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 materialMetal
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20LJ
The GAFR500C20LJ is a filter and regulator combined into a single body, handling both filtration and pressure control without needing separate components. This 3/4in unit operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi) and comes with a 40 um element, making it suitable for applications requiring a modest, stable outlet pressure.
Its metal bowl holds 108 cc of condensate, and the unit weighs 950 g, placing it in the mid-large size class. The integrated design reduces potential leak points compared to a separate filter plus regulator setup, and the circular gauge with MPa/psi scale is fitted for direct pressure reading.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20LJ |
|---|---|
| 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 | Metal |
| 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 | Not included (J) |
| 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 GAFR500C20LJ
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. 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). |
| J | No bracket (J) — supplied without the mounting bracket. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR500C20LJ Is Used
Precision pressure for a single station
Feed a dedicated assembly station that requires a stable, low pressure of 0.15-0.4 MPa for delicate operations. The 3/4in port and 950 g body suit a fixed machine frame, while the metal bowl handles routine condensate collection.
Low-pressure test rig supply
Use this unit to supply a test rig that validates components at pressures up to 0.4 MPa. The 40 um element protects downstream valves, and the fitted gauge lets operators verify the setpoint directly on the MPa/psi scale.
Machine header with limited pressure needs
Install on a machine header where the process never exceeds 0.4 MPa, such as a light-duty actuation line. The 108 cc metal bowl reduces drain frequency compared to smaller bodies, and the no-bracket design suits existing panel mounts.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20LJ the Right Air-Prep Unit?
Choose the GAFR500 body when you need 3/4in ports and a 108 cc metal drain bowl, stepping up from the GAFR400's 100 cc bowl for slightly more condensate capacity. The metal bowl suits demanding environments, though verify compatibility with aggressive media as no chemical resistance data is published. This L-type unit is limited to 0.15-0.4 MPa (20-58 psi) output, so confirm your system never requires more than 0.4 MPa. The J code means no mounting bracket is included, so plan for panel mounting or an existing bracket. A 40 um element is fitted, and the PT thread comes with an MPa/psi gauge scale. If downstream lubrication is ever needed, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above this unit's 0.4 MPa regulated ceiling.
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 GAFR500C20LJ FAQ
The GAFR500C20LJ is a filter & regulator with a 3/4in port and a 108 cc metal drain bowl, weighing 950 g. Its pressure range is 0.15-0.4 MPa (20-58 psi), with a maximum supply of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The unit has a 40 um element, a semi-auto plus manual drain, and a fitted circular gauge with MPa/psi scale.
The L code designates the lower-pressure type, which tops out at 0.4 MPa (58 psi) instead of the standard 0.9 MPa (130 psi). This suits applications that only need modest pressure. The J code means the mounting bracket is omitted, so you must use an existing bracket or panel mount. The metal bowl is standard for this size class, and the semi-auto plus manual drain requires periodic attention to empty condensate.
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