Airtac GAFC Air Service Unit GAFC500N20LW
The AirTAC Airtac GAFC Air Service Unit GAFC500N20LW is a genuine two-piece F.R.L. combination — a GA-series filter & regulator and a lubricator pre-assembled on one T-shape bracket with quick mounting clamps. It has 3/4" ports, a 5 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi).
- TypeF.R.L. combination
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight1910 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAFC Air Service Unit GAFC500N20LW
This AirTAC GAFC500N20LW is a two-piece F.R.L. combination built for a 3/4in air line. The first body houses both the filter and the regulator, so particles and water drop out and pressure is set to a lower 0.15-0.4 MPa (20-58 psi) band before the air moves on. The second body is the lubricator, which meters ISO VG 32 oil mist into the flow last, keeping the regulator seat dry.
The nylon bowls hold 108 cc of condensate and 225 cc of oil, and the complete unit weighs 1910 g. A circular gauge with an MPa/psi scale is fitted, and the 5 um element traps finer particles than the standard 40 um grade. With a 1.0 MPa (145 psi) maximum supply, this lower-pressure model leaves about 0.6 MPa of headroom above its 0.4 MPa top setting.
Airtac GAFC Air Service Unit GAFC500N20LW Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500N20LW |
|---|---|
| Series | GAFC500 F.R.L. combination |
| 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 | Nylon |
| 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 |
| Capacity of oil bowl | 225 cc |
| Recommended lubricant | ISO VG 32 or equivalent |
| Weight | 1910 g |
Specifications follow the official AirTAC GAFC catalogue (pages 219-220). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
Model Code: Airtac GAFC Air Service Unit GAFC500N20LW
| GAFC500 | GA500 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. 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) | Circular pressure gauge fitted. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| (blank) | No reverse-flow valve. |
Constituent units, orderable separately as spares: GAFR500-20 filter & regulator, GAL500-20 lubricator — both share this body and port. A GAFC has two units, not three: the filter and the regulator are one body.
Size Class & Flow Envelope
- GAFC2001/8"-1/4" · 1750 L/min
- GAFC3001/4"-1/2" · 3500 L/min
- GAFC4003/8"-1/2" · 6000 L/min
- GAFC5003/4" · 7000 L/min
- GAFC6003/4"-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 | GAFC500 · 3/4" · curve to 7000 L/min |
|---|---|
| One size down | GAFC400 |
| One size up | GAFC600 (curve to 12000 L/min) |
| Build order | Filter & regulator → bracket → lubricator |
Where the Airtac GAFC Air Service Unit GAFC500N20LW Is Used
Precision grinding spindle lubrication
Feed a 3/4in line to a precision grinding spindle where consistent oil mist is critical. The 5 um element protects the spindle's fine clearances, while the lower-pressure regulator keeps the air supply gentle and predictable.
Multi-station assembly bench
Supply a multi-station assembly bench with a single 3/4in drop. The 225 cc oil bowl keeps several small cylinders lubricated between refills, and the 108 cc drain bowl captures condensate from a busy line.
Low-pressure paint agitation
Run a low-pressure paint agitation system where the air must stay below 0.4 MPa. The L-type regulator prevents over-pressurizing the agitator, while the filter removes moisture that could spoil the paint finish.
Is the Airtac GAFC Air Service Unit GAFC500N20LW the Right Air-Prep Unit?
Choose the GAFC500N20LW when your machine needs a 3/4in port and a regulated output capped at 0.4 MPa (20-58 psi). The L type is the lower-pressure variant, so if your process may ever require more than 0.4 MPa, select the standard S type instead. The nylon bowl is a build choice; the catalogue lists the same 1.0 MPa maximum and -5 to 70 C range for all bowl materials, so confirm nylon suits your environment. The 5 um element provides finer filtration for sensitive components but will need more frequent service than a 40 um element. Both a semi-auto drain and a manual drain are fitted, and the PT thread carries an MPa/psi gauge scale. The filter-regulator and lubricator are orderable separately as GAFR500-20 and GAL500-20, so a worn element or damaged bowl does not force a full replacement. A 1.0 MPa max supply sits about 0.6 MPa above this unit's 0.4 MPa regulated ceiling, giving you room to keep the setpoint stable even if inlet pressure fluctuates.
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
- ✓ Thread & gauge scale (PT / G / NPT)
Installation & Maintenance Notes
- check Install with the airflow arrow: filter-regulator first, lubricator last.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Fill the oil bowl with ISO VG 32 or equivalent only.
- check Drain condensate before the 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 1910 g unit on its bracket, not on the tubing.
The lubricator adds an oil mist downstream of the regulator. If any part of the line must stay oil-free, use a plain GAFR500-20 filter-regulator on that branch instead of the full combination.
Airtac GAFC Air Service Unit GAFC500N20LW FAQ
The GAFC500N20LW operates at 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). It works in temperatures from -5 to 70 C and uses ISO VG 32 lubricant. The drain bowl holds 108 cc and the oil bowl holds 225 cc, with a total weight of 1910 g.
The L in the code specifies the lower-pressure type, which regulates from 0.15 to 0.4 MPa instead of the standard 0.15 to 0.9 MPa. This suits applications that must not exceed 0.4 MPa, such as delicate instruments or low-pressure painting. If your process might need more pressure later, choose the standard S type instead.
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