Airtac GAFC Air Service Unit GAFC50020SN
The AirTAC Airtac GAFC Air Service Unit GAFC50020SN 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 GAFC50020SN
This AirTAC GAFC50020SN 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 air is cleaned and set to pressure in one step before the lubricator adds a metered oil mist downstream. With a 1910 g mass and a 3/4in port, it suits a machine header or a multi-station line where a smaller unit would starve the actuators.
The standard pressure range is 0.15-0.9 MPa (20-130 psi), and the 40 um element handles typical workshop air. The 108 cc condensate bowl and 225 cc oil bowl mean the unit runs longer between services than a GAFC300, whose drain bowl holds 60 cc. The semi-auto drain dumps condensate each time pressure drops, while the manual drain gives on-demand control.
Airtac GAFC Air Service Unit GAFC50020SN Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020SN |
|---|---|
| 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 GAFC50020SN
| 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. |
| (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 GAFC50020SN Is Used
Machine tool coolant systems
Feed a 3/4in header that supplies coolant valves and clamping cylinders on a CNC lathe, where steady pressure and clean air keep cycle times consistent.
Multi-station assembly conveyors
Run a line of pneumatic stops and pushers on an automotive assembly conveyor, with the 225 cc oil bowl reducing how often an operator tops up the lubricator.
Packaging line tension controls
Supply a film-wrapping machine's tensioning brakes and guide rollers, where the 40 um element protects small orifices in precision valves from pipe scale.
Is the Airtac GAFC Air Service Unit GAFC50020SN the Right Air-Prep Unit?
Choose the GAFC500 when a 3/4in line feeds several actuators or a single large cylinder. The PC bowl is the standard build; if you need a metal or nylon bowl, order the C or N code instead. The semi-auto and manual drains are both fitted, so condensate is handled without an operator. The N code means no gauge is supplied, and the 1/4in gauge connection is ready for one if you add it later. The standard type regulates from 0.15 to 0.9 MPa (20-130 psi); the lower-pressure L type is not available on this body. The 40 um element is the default; the W code swaps in a 5 um element for finer filtration. The PT thread is standard, and the gauge scale would read MPa/psi if fitted. The lubricator is meant to carry oil, so if the line must stay oil-free, choose a plain GAFR500-20 filter-regulator instead. Spare parts are orderable as GAFR500-20 and GAL500-20. The 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan the inlet pressure carefully 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 GAFC50020SN FAQ
The GAFC50020SN operates from 0.15 to 0.9 MPa (20-130 psi) with a max pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It works in -5 to 70 C temperatures and uses ISO VG 32 lubricant. The condensate bowl holds 108 cc and the oil bowl holds 225 cc, with a total weight of 1910 g.
The N after the port code means no gauge is supplied with this unit. The body still has a 1/4in gauge connection, so you can add a circular gauge later if you need to read the set pressure directly. The PT thread version would use an MPa/psi scale.
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