Airtac GAFC Air Service Unit GAFC50020ALW
The AirTAC Airtac GAFC Air Service Unit GAFC50020ALW 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 gaugeCircular, MPa / psi
- 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 GAFC50020ALW
This AirTAC GAFC50020ALW is a two-piece F.R.L. combination built for a 3/4in line. The first body combines a filter and a regulator, so solids and moisture drop out and pressure is set to the 0.15-0.4 MPa (20-58 psi) band before air moves on. The lubricator then adds a metered ISO VG 32 oil mist as the last step, keeping oil away from the regulator seat.
The 5 um element traps finer particles than the standard 40 um grade, which suits precision valves or instrument circuits. With a 1910 g mass and a 108 cc condensate bowl plus a 225 cc oil bowl, this unit is a service point for a machine header rather than a single actuator. The automatic drain clears water without an operator, and the circular gauge reads in MPa and psi.
Airtac GAFC Air Service Unit GAFC50020ALW Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020ALW |
|---|---|
| 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
Model Code: Airtac GAFC Air Service Unit GAFC50020ALW
| 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). |
| (blank) | Circular pressure gauge fitted. |
| 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 GAFC50020ALW Is Used
Machine tool header
Feed a 3/4in header on a CNC lathe or milling center, where the 5 um element protects servo valves and the automatic drain handles condensate from a busy shift.
Instrument air circuit
Supply a bank of precision regulators or I/P transducers on a test bench, where the finer 5 um filtration and the lower 0.4 MPa range match delicate settings.
Multi-station assembly line
Run a section of a packaging or assembly conveyor with multiple actuators, using the 225 cc oil bowl to keep lubricated air flowing to several valves between services.
Is the Airtac GAFC Air Service Unit GAFC50020ALW the Right Air-Prep Unit?
Choose the GAFC500 when a 3/4in port and a 1910 g body match your header or multi-station line. The catalogue flow curve for this body is plotted to 7000 L/min at 0.7 MPa inlet, so use that envelope to size against a real duty point. The L type caps the regulated range at 0.4 MPa, which is about 44% of the standard 0.9 MPa ceiling, so if a station may ever need more pressure, step to the S type instead. The 5 um element filters finer but needs more frequent service than a 40 um grade. The automatic drain suits wet or unattended lines, and the PT thread carries a gauge scaled in MPa and psi. Spares are the GAFR500-20 filter-regulator and the GAL500-20 lubricator, both orderable separately. A 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan the inlet pressure with that margin 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 GAFC50020ALW FAQ
The GAFC50020ALW operates from 0.15 to 0.4 MPa (20-58 psi) with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). It works in temperatures from -5 to 70 C and must not freeze. The drain bowl holds 108 cc, the oil bowl holds 225 cc, and the unit weighs 1910 g. Use ISO VG 32 or equivalent oil in the lubricator.
The L in the code sets the regulated band to 0.15-0.4 MPa, which suits applications that never need more than 0.4 MPa, such as light clamping or low-force cylinders. The W specifies a 5 um element that traps finer particles than the standard 40 um grade, protecting sensitive valves but requiring more frequent element checks. The automatic drain and the fitted gauge with an MPa/psi scale round out the build.
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