Airtac GAFC Air Service Unit GAFC500C20SNK
The AirTAC Airtac GAFC Air Service Unit GAFC500C20SNK 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 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 GAFC500C20SNK
This AirTAC GAFC500C20SNK is an F.R.L. combination built from two bodies on one T-bracket: the first body houses the filter and regulator together, and the second is the lubricator that meters oil mist into the air last. With a 3/4in port and a 1910 g mass, it belongs to the upper-middle size class, suited to a machine header or a multi-station line rather than a single small actuator.
The standard pressure range is 0.15-0.9 MPa (20-130 psi), and the 40 um element handles general shop air. The metal bowl is specified by the C code, and the semi-auto drain dumps condensate each time pressure drops while the manual drain gives on-demand control. No gauge is supplied with this unit, so the 1/4in gauge connection is where an operator would add one to read the set pressure.
Airtac GAFC Air Service Unit GAFC500C20SNK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500C20SNK |
|---|---|
| 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. 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 GAFC500C20SNK
| 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). |
| 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 GAFC500C20SNK Is Used
Machine tool header
Feed a 3/4in header on a CNC lathe or milling machine, where the 1910 g unit mounts on a frame and the 108 cc drain bowl handles condensate between shifts.
Multi-station assembly line
Supply filtered, regulated, lubricated air to a row of pneumatic actuators on a packaging conveyor, with the 225 cc oil bowl reducing how often an operator refills the lubricator.
Hydraulic press retrofit
Add controlled lubrication to the air pilot circuit of a hydraulic press, where the standard 0.15-0.9 MPa range covers typical pilot pressures and the metal bowl suits a shop floor environment.
Is the Airtac GAFC Air Service Unit GAFC500C20SNK the Right Air-Prep Unit?
Choose the GAFC500 when a 3/4in port and the 108 cc drain bowl plus 225 cc oil bowl match the service interval you want; the next body up, the GAFC600, offers a 205 cc drain bowl but only with a metal bowl and standard type. The metal bowl here is a build choice, and the shared specification of 1.0 MPa max and -5 to 70 C applies regardless, so confirm the material suits your surroundings. The semi-auto and manual drains are both fitted, the 40 um element is standard, and the PT thread carries the default MPa/psi gauge scale if you add a gauge later. The reverse-flow (reflux) valve is fitted, and the two units are orderable separately as the GAFR500-20 filter & regulator and the GAL500-20 lubricator. Since the lubricator adds oil mist, a line that must stay oil-free needs a plain GAFR filter-regulator instead. With a 1.0 MPa max supply, there is about 0.1 MPa above the 0.9 MPa top of the range, so plan the supply pressure with that narrow headroom in mind.
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 GAFC500C20SNK FAQ
The working pressure range is 0.15-0.9 MPa (20-130 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). It operates 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 N after the port code means no gauge is supplied, so the set pressure cannot be read without adding one to the 1/4in gauge connection. The K code indicates the reverse-flow (reflux) valve is fitted, which the catalogue shows as a separate pneumatic symbol.
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