Airtac GAFC Air Service Unit GAFC500C20ALWK
The AirTAC Airtac GAFC Air Service Unit GAFC500C20ALWK 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 materialMetal
- Drainautomatic
- 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 GAFC500C20ALWK
This AirTAC GAFC500C20ALWK is an F.R.L. combination built from two units on a T-shape bracket: a filter-regulator body that cleans the air and sets its pressure, followed by a lubricator that adds a controlled oil mist. The 3/4in port and 1910 g mass place it in the mid-large size class, needing a proper panel or frame mount rather than support from the tubing. The lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), and the 5 um element traps finer particles than the standard 40 um grade.
The metal bowl (C code) holds 108 cc of condensate, while the separate oil bowl holds 225 cc, so the service interval is driven by how often these need attention. The automatic drain clears condensate without an operator, which suits wet lines or unattended machines. A circular gauge is fitted, reading MPa/psi for the default PT thread, and the reverse-flow (reflux) valve is included. Max pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and the unit is rated for -5 to 70 C with ISO VG 32 lubricant.
Airtac GAFC Air Service Unit GAFC500C20ALWK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500C20ALWK |
|---|---|
| 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 | Metal |
| 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 |
| 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 GAFC500C20ALWK
| GAFC500 | GA500 series F.R.L. unit — sets ports, 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". |
| 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) | Circular pressure gauge fitted. |
| W | Filtering grade 5 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFC500C20ALWK Is Used
Precision Instrument Air
The 5 um element and lower 0.4 MPa ceiling suit a precision gauging station or a laboratory air bench where fine particles and a modest, stable pressure are required.
Machine Tool Lubrication
Feed a 3/4in header on a CNC lathe or milling machine, where the lubricator adds ISO VG 32 oil mist to the air for slideways and spindles, and the automatic drain handles condensate from the compressor.
Packaging Line Air Prep
Supply a multi-station packaging machine with a 3/4in line, where the 108 cc drain bowl and 225 cc oil bowl reduce service stops and the lower pressure range protects sensitive actuators.
Is the Airtac GAFC Air Service Unit GAFC500C20ALWK the Right Air-Prep Unit?
Choose this GAFC500C20ALWK when you need a 3/4in port with a lower 0.15-0.4 MPa (20-58 psi) regulated band and a 5 um element for finer filtration. The metal bowl is a build choice, but the shared specification (1.0 MPa max, -5 to 70 C) is identical across materials, so confirm it suits your surroundings. The automatic drain is decisive for unattended lines, and the fitted gauge reads MPa/psi. The reverse-flow valve is present, and the two units are orderable separately as GAFR500-20 and GAL500-20. If the line must stay oil-free, omit the lubricator and choose a plain GAFR filter-regulator instead. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan the inlet pressure accordingly.
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 GAFC500C20ALWK FAQ
The GAFC500C20ALWK operates at 0.15-0.4 MPa (20-58 psi) with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C, and it uses ISO VG 32 lubricant. It has a 108 cc drain bowl and a 225 cc oil bowl, with a total weight of 1910 g. The port is 3/4in, and the element grade is 5 um.
The metal bowl (C code) is a build choice; the catalogue gives no impact or chemical data, so confirm it suits your environment. The lower pressure range (L) tops out at 0.4 MPa, which is about 44% of the standard 0.9 MPa ceiling. If your machine may ever need more than 0.4 MPa, this is the wrong part.
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