Airtac GAFR Adjustable Filter Regulator GAFR500C20LJW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20LJW 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 materialMetal
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20LJW
The GAFR500C20LJW is a filter & regulator with both functions in one body, so it replaces a separate filter plus regulator with a single unit that has fewer joints to seal. This model uses a 3/4in port, a metal bowl, and a 5 um element, with a lower-pressure range of 0.15-0.4 MPa (20-58 psi).
The diversion structure spins incoming air to drop liquid water and solid particles into the 108 cc condensate bowl, while the balanced regulator holds the outlet steady as supply pressure varies. The pressed-in self-locking knob resists set-pressure drift from vibration, and the circular gauge with clip and magnifier reads MPa/psi.
Airtac GAFR Adjustable Filter Regulator GAFR500C20LJW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20LJW |
|---|---|
| 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 | 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 GAFR500C20LJW
| 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. |
| 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 GAFR500C20LJW Is Used
Machine header supply
Feed a 3/4in header on a stamping press or assembly machine where the lower pressure range protects sensitive tooling and the 5 um element keeps pilot valves clean.
Instrument air for gauges
Supply a bank of pressure gauges or transducers on a test bench where the 5 um element filters fine particles and the balanced regulator maintains a stable setpoint.
Multi-station line
Mount on a multi-station indexing line where the 108 cc metal bowl handles condensate from several actuators and the lower pressure range protects downstream components.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20LJW the Right Air-Prep Unit?
This GAFR500 body with a 3/4in port and 950 g mass sits above the GAFR400 (3/8in-1/2in, 880 g) and below the GAFR600 (3/4in-1in, 1880 g), so it suits mid-size machine headers. The metal bowl (C) is the only option on this unit, and the 5 um element (W) traps finer particles than the standard 40 um for precision valves or instrument air. The semi-auto drain plus manual drain (blank) means you can purge condensate on demand or let it release automatically when the pressure drops, while the J code means no mounting bracket is included - plan for a panel mount or existing bracket. The L type tops out at 0.4 MPa, so if the machine may ever need more than that, the standard S type is the right choice. The gauge is fitted with a PT thread and MPa/psi scale, and there is no reflux valve on this unit. If oil is needed downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated 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 GAFR500C20LJW FAQ
The GAFR500C20LJW is a filter & regulator with a 3/4in port, a metal bowl, and a 5 um element. The pressure range is 0.15-0.4 MPa (20-58 psi), with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C, the drain bowl holds 108 cc, and the unit weighs 950 g. It has a semi-auto drain plus manual drain, no mounting bracket, and a fitted gauge reading MPa/psi.
The L code in GAFR500C20LJW means this is the lower-pressure type, regulating from 0.15 to 0.4 MPa (20-58 psi) instead of the standard 0.15-0.9 MPa. This suits applications that need a gentle, consistent supply below 0.4 MPa, such as delicate tooling or instruments. If your machine may ever need more than 0.4 MPa, choose the standard S type instead.
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