Airtac GAFC Air Service Unit GAFC50020ALNW
The AirTAC Airtac GAFC Air Service Unit GAFC50020ALNW 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 5 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 grade5 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 GAFC50020ALNW
This AirTAC GAFC50020ALNW is a two-piece F.R.L. combination: a filter-regulator body paired with a lubricator on a shared T-bracket. The 3/4in port and 1910 g mass place it in the heavy mid-range class, sized for a machine header rather than a single actuator. It filters to 5 um, regulates from 0.15 to 0.4 MPa (20-58 psi), and the automatic drain clears the 108 cc condensate bowl without an operator.
The lower-pressure regulator tops out at 0.4 MPa, so this unit suits lines that never need more than that ceiling. Air is filtered and set to pressure first, then the lubricator meters ISO VG 32 oil mist into the flow last, so oil never passes back through the regulator seat. The 225 cc oil bowl extends service intervals, and the missing gauge means the 1/4in gauge connection is left for you to fit if you need to read the setpoint.
Airtac GAFC Air Service Unit GAFC50020ALNW Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020ALNW |
|---|---|
| Series | GAFC500 F.R.L. combination |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 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 GAFC50020ALNW
| 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. |
| W | Filtering grade 5 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 GAFC50020ALNW Is Used
Machine tool coolant systems
Feed a 3/4in header on a CNC lathe or milling center, where the 5 um element protects coolant valves and the automatic drain handles condensate from wet shop air.
Assembly line pallet stops
Power multiple pneumatic stops on an automotive assembly conveyor, with the lower-pressure range keeping actuation gentle and the 225 cc oil bowl reducing refill frequency.
Packaging line tension controls
Regulate air for film tensioning cylinders on a packaging machine, where the 0.4 MPa ceiling prevents over-force and the 5 um element keeps metering valves clean.
Is the Airtac GAFC Air Service Unit GAFC50020ALNW the Right Air-Prep Unit?
Choose the GAFC50020ALNW when your line needs 3/4in ports and a regulated band capped at 0.4 MPa (20-58 psi). The L type is a deliberate ceiling: if the machine may ever require more than 0.4 MPa, step to the standard S type instead. The 5 um element traps finer particles than the standard 40 um grade, which suits precision valves or instrument air, though it will need more frequent service. The automatic drain handles wet or unattended lines, and the PC bowl is the default build - confirm it suits your surroundings, as the catalogue gives no material-specific ratings. The gauge is not fitted; the 1/4in connection is ready for one if you add it later. Spares are orderable as the GAFR500-20 filter & regulator and the GAL500-20 lubricator. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of the regulated range.
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 GAFC50020ALNW FAQ
This lower-pressure unit operates from 0.15 to 0.4 MPa (20-58 psi), with a maximum supply 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 must not freeze. The drain bowl holds 108 cc, the oil bowl 225 cc, and the unit weighs 1910 g. Use ISO VG 32 lubricant in the lubricator.
The N after the port code means no gauge is supplied with this unit. The 1/4in gauge connection is still present on the body, so you can fit a circular gauge later if you need to read the set pressure. The PT thread option means the gauge scale would read in MPa and psi if one is added.
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Standard models are processed and dispatched in 3-5 business days.
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