Airtac GAFC Air Service Unit GAFC50020ALNK
The AirTAC Airtac GAFC Air Service Unit GAFC50020ALNK 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 - 0.4 MPa (20 - 58 psi).
- TypeF.R.L. combination
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialPC
- Drainautomatic
- 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 GAFC50020ALNK
This GAFC50020ALNK is a two-piece F.R.L. combination: a filter-regulator body paired with a lubricator, mounted on a shared T-bracket with quick clamps. The 3/4in port and 1910 g mass put it in the mid-large class, sized for a machine header or a multi-station line rather than a single actuator. It regulates from 0.15 to 0.4 MPa (20-58 psi), and the 40 um element handles standard shop air.
The automatic drain clears condensate from the 108 cc bowl without operator attention, while the 225 cc oil bowl feeds the lubricator. Since this is the lower-pressure type, the regulated ceiling is 0.4 MPa - if your process may ever need more than that, this is the wrong unit. The reverse-flow (reflux) valve is fitted, and no gauge is supplied; the 1/4in gauge connection is there if you add one later.
Airtac GAFC Air Service Unit GAFC50020ALNK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020ALNK |
|---|---|
| Series | GAFC500 F.R.L. combination |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| Bowl material | PC |
| 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. 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 GAFC50020ALNK
| 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". |
| 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). |
| 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 GAFC50020ALNK Is Used
Machine tool header
Feed a 3/4in header supplying several machine tools with filtered, regulated air and a controlled oil mist. The 108 cc drain bowl and automatic drain handle condensate from a busy shift.
Multi-station assembly line
Supply a multi-station assembly conveyor where each station has a small actuator. The 225 cc oil bowl keeps lubricator refills infrequent across a full production day.
Paint booth air prep
Prepare air for paint booth cylinders and valves that run at lower pressures. The 0.15-0.4 MPa range suits delicate finishing equipment, and the automatic drain keeps moisture out.
Is the Airtac GAFC Air Service Unit GAFC50020ALNK the Right Air-Prep Unit?
Choose this GAFC500 when your line needs 3/4in ports and a 1910 g body that suits a fixed frame mount. The PC bowl is the standard build; the catalogue gives no impact or chemical data, so confirm it suits your surroundings. The automatic drain is the right call for wet or unattended lines, saving someone from manual dumps. The L type tops out at 0.4 MPa (20-58 psi), so verify your actuators never need more. With no gauge fitted, plan to read pressure at a downstream gauge or add one to the 1/4in connection. The PT thread carries an MPa/psi scale if you fit a gauge. The reverse-flow valve is included per the K code. Spares are the GAFR500-20 filter-regulator and GAL500-20 lubricator, both orderable separately. For oil-free lines, omit the lubricator and choose a plain GAFR instead. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so you have ample inlet margin for stable regulation.
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 GAFC50020ALNK FAQ
This F.R.L. combination works with air, regulates from 0.15 to 0.4 MPa (20-58 psi), and handles a max pressure of 1.0 MPa (145 psi) with a proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 108 cc and the oil bowl 225 cc. Use ISO VG 32 lubricant. The unit weighs 1910 g and has a 3/4in port.
The N in the code after the port means no gauge is supplied with this unit. The GAFC500 body has a 1/4in gauge connection, so you can add a compatible gauge later if you need to read the set pressure directly at the unit. The PT thread uses an MPa/psi scale.
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