Airtac GAFC Air Service Unit GAFC500N20ALWK
The AirTAC Airtac GAFC Air Service Unit GAFC500N20ALWK 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 materialNylon
- 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 GAFC500N20ALWK
This AirTAC GAFC500N20ALWK is a two-piece F.R.L. combination built for a 3/4in line. A filter and regulator share one body to clean the air and set pressure, then a lubricator adds a controlled oil mist downstream. The 5 um element traps fine particles for sensitive equipment, and the lower-pressure regulator tops out at 0.4 MPa (20-58 psi).
The nylon bowls hold 108 cc for condensate and 225 cc for oil, so the 1910 g unit suits machines that run for long shifts between services. The automatic drain clears water without an operator, and the circular gauge with an MPa/psi scale lets you verify the setpoint at a glance. A reverse-flow valve is fitted as part of this build.
Airtac GAFC Air Service Unit GAFC500N20ALWK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500N20ALWK |
|---|---|
| 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 | Nylon |
| 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 GAFC500N20ALWK
| GAFC500 | GA500 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. 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. |
| 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 GAFC500N20ALWK Is Used
CNC coolant valves
Feed a 3/4in header that supplies coolant control valves on a CNC lathe, where the 5 um element protects fine orifices and the lower pressure range suits the 0.3 MPa actuation signal.
Assembly line pallet stops
Power pneumatic pallet stops on an assembly line where the automatic drain clears condensate from a wet compressor line, and the 225 cc oil bowl keeps lubricators filled across two shifts.
Test bench air supply
Supply a laboratory test bench that needs regulated air at 0.35 MPa for fixture clamps, with the 108 cc drain bowl capturing water from a non-dried shop air supply.
Is the Airtac GAFC Air Service Unit GAFC500N20ALWK the Right Air-Prep Unit?
Choose the GAFC500 body when a 3/4in port and a 1910 g mass fit your panel layout; it steps down from the GAFC600's 1in port and 3430 g weight. The nylon bowl is a material choice only - the 1.0 MPa max and -5 to 70 C rating are identical across bowl options, so confirm nylon suits your environment. The automatic drain handles wet lines without manual attention, while the 5 um element filters finer than the standard 40 um but needs more frequent service. The L-type regulator limits you to 0.15-0.4 MPa (20-58 psi), so verify your actuators never need more than 0.4 MPa. The PT thread carries an MPa/psi gauge scale, and the K code adds the reverse-flow valve. Spare parts are the GAFR500-20 filter-regulator and GAL500-20 lubricator, both orderable separately. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the 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 GAFC500N20ALWK FAQ
This F.R.L. combination operates from 0.15 to 0.4 MPa (20-58 psi) with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C, and it uses ISO VG 32 lubricant. The drain bowl holds 108 cc, the oil bowl holds 225 cc, and the unit weighs 1910 g.
The L code sets the regulator to 0.15-0.4 MPa (20-58 psi), which suits low-pressure actuation but cannot supply higher pressures if your machine needs them later. The W code specifies a 5 um element that traps finer particles than the standard 40 um, protecting precision valves but requiring more frequent element changes.
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