Airtac GAFC Air Service Unit GAFC50020SNK
The AirTAC Airtac GAFC Air Service Unit GAFC50020SNK 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 materialPC
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- 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 GAFC50020SNK
This AirTAC GAFC50020SNK is a two-piece F.R.L. combination: a filter-regulator body paired with a lubricator on a shared T-bracket. Air enters the 3/4" port, gets filtered and regulated to 0.15-0.9 MPa (20-130 psi), then the lubricator adds a controlled oil mist downstream. The 40 um element handles standard shop air, and the semi-auto drain plus manual drain are both fitted.
The PC bowl is the default build choice, and the catalogue's common specification applies: max pressure 1.0 MPa (145 psi), proof 1.5 MPa (215 psi), and -5 to 70 C operating range. No gauge is supplied with this model, so the gauge connection at 1/4" is where one can be added later. The reverse-flow (reflux) valve is fitted, and the whole unit weighs 1910 g, making it a substantial piece of line hardware.
Airtac GAFC Air Service Unit GAFC50020SNK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020SNK |
|---|---|
| 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 | PC |
| 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. No gauge is supplied with this model — the gauge connection on a GAFC500 is 1/4" if you add one.
Model Code: Airtac GAFC Air Service Unit GAFC50020SNK
| GAFC500 | GA500 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. 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). |
| N | No pressure gauge; 1/4" gauge connection. |
| (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 GAFC50020SNK Is Used
Machine Tool Lines
Feed a 3/4" header serving CNC lathes or milling machines where consistent pressure and tool lubrication are needed. The 1910 g body mounts firmly to a frame, and the 225 cc oil bowl supports extended machining cycles.
Assembly Conveyors
Supply a multi-station conveyor system with filtered, regulated air and oil mist for pneumatic actuators. The 108 cc condensate bowl handles moisture from a busy line, and the semi-auto drain clears it on each pressure drop.
Packaging Equipment
Use on a carton-forming or filling machine where cylinders cycle rapidly and need both clean air and consistent lubrication. The 40 um element protects sensitive valves, while the lubricator keeps moving parts wearing evenly.
Is the Airtac GAFC Air Service Unit GAFC50020SNK the Right Air-Prep Unit?
Choose the GAFC500 for a 3/4" line that needs both filtration and lubrication in a compact footprint. The 108 cc drain bowl and 225 cc oil bowl mean fewer service stops than a smaller body like the GAFC300's 60 cc and 98 cc bowls. The PC bowl is the standard material; confirm it suits your environment since the catalogue gives no material-specific ratings. The semi-auto drain dumps on pressure drop while the manual drain gives on-demand control. The 40 um element is the default; step to the W version for 5 um if your downstream valves need finer filtration. The PT thread is standard with an MPa/psi gauge scale, though this model ships without a gauge. The K code adds the reverse-flow valve, which the catalogue shows as a separate symbol. Spares are the GAFR500-20 filter-regulator and GAL500-20 lubricator, both orderable separately. The 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan your 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 GAFC50020SNK FAQ
The GAFC50020SNK operates from 0.15 to 0.9 MPa (20-130 psi) with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 108 cc drain bowl and a 225 cc oil bowl, weighs 1910 g, and uses ISO VG 32 or equivalent lubricant. The element grade is 40 um.
The N after the port code means no gauge is supplied, so you cannot read the set pressure without adding one at the 1/4" gauge connection. The K code specifies that a reverse-flow (reflux) valve is fitted. This valve is shown as a separate pneumatic symbol in the catalogue, and its detailed function is covered on a dedicated page.
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