Airtac GAFC Air Service Unit GAFC500C20SK
The AirTAC Airtac GAFC Air Service Unit GAFC500C20SK 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 40 µm filter element and regulates 0.15 - 0.9 MPa (20 - 130 psi).
- TypeF.R.L. combination
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialMetal
- 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 GAFC500C20SK
This AirTAC GAFC500C20SK is a two-piece F.R.L. combination: a filter-regulator in one body paired with a lubricator, mounted on a T-bracket with quick clamps. The 3/4in port and 1910 g weight place it in the mid-large size class, suitable for machine headers or multi-station lines that need a steady supply of conditioned air.
Air enters the first body where the 40 um element removes solids and moisture, and the regulator sets pressure within 0.15-0.9 MPa (20-130 psi). The lubricator then adds a metered oil mist downstream, so oil never passes back through the regulator seat. The metal bowl and the fitted circular gauge (MPa/psi scale) are part of this build, and the reverse-flow valve is included as specified.
Airtac GAFC Air Service Unit GAFC500C20SK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500C20SK |
|---|---|
| Series | GAFC500 F.R.L. combination |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 |
| 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 GAFC500C20SK
| 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". |
| (blank) | Drain: Semi-auto drain + manual drain. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Circular pressure gauge fitted. |
| (blank) | Filtering grade 40 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 GAFC500C20SK Is Used
Machine Tool Header
Feed a 3/4in header supplying multiple pneumatic actuators on a CNC machining center, where the 108 cc condensate bowl handles moisture from a wet compressor line.
Multi-Station Assembly Line
Condition air for a conveyor system with several pick-and-place units, using the 225 cc oil bowl to keep lubricated cylinders running between scheduled maintenance.
Packaging Equipment
Supply filtered and regulated air to a case packer's film-sealing station, where the metal bowl suits a plant environment and the manual drain allows operator-controlled purging.
Is the Airtac GAFC Air Service Unit GAFC500C20SK the Right Air-Prep Unit?
Choose this GAFC500 if your line needs the 3/4in port size and the 108 cc condensate bowl with the 225 cc oil bowl, which means fewer service stops than a smaller body. The metal bowl is a build choice; the common specification of 1.0 MPa max and -5 to 70 C applies to all bowl materials, so confirm the metal suits your environment. The semi-auto drain dumps condensate on each pressure drop, and the manual drain gives on-demand control. The 40 um element is the standard grade; if you need finer filtration, select the W option for 5 um. The PT thread comes with the MPa/psi gauge scale, and the K code means the reverse-flow valve is fitted. For spares, order the GAFR500-20 filter-regulator and the GAL500-20 lubricator separately. If your process requires oil-free air, omit the lubricator and choose a plain GAFR filter-regulator instead. The 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the regulated range, so plan your inlet pressure near the maximum if you need the full output.
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 GAFC500C20SK FAQ
The GAFC500C20SK operates from 0.15 to 0.9 MPa (20-130 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. It has a 108 cc condensate bowl and a 225 cc oil bowl, weighs 1910 g, and uses ISO VG 32 or equivalent lubricant.
The K in GAFC500C20SK indicates the reverse-flow (reflux) valve is fitted. This is an ordering difference shown as a separate pneumatic symbol in the catalogue. The valve is included as part of the assembly, and details of its function are covered on the dedicated page in the catalogue.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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