Airtac GAFC Air Service Unit GAFC500N20ALK
The AirTAC Airtac GAFC Air Service Unit GAFC500N20ALK 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 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 GAFC500N20ALK
This AirTAC GAFC500N20ALK is a two-piece F.R.L. combination built around a 3/4in port size. The first body houses both the filter and the regulator, so air is cleaned and set to pressure before it reaches the lubricator stage, which adds a controlled oil mist last. The nylon bowl is specified by the N code, and the unit weighs 1910 g, placing it in the mid-large size class for shop-floor air preparation.
The lower-pressure L type regulates from 0.15 to 0.4 MPa (20-58 psi), which suits applications that need a modest, consistent pressure rather than the full 0.9 MPa range. The 40 um element handles standard shop air, while the 108 cc condensate bowl and 225 cc oil bowl define the service interval. A circular gauge is fitted, reading in MPa and psi for the default PT thread.
Airtac GAFC Air Service Unit GAFC500N20ALK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500N20ALK |
|---|---|
| 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 | 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 GAFC500N20ALK
| 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. |
| (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 GAFC500N20ALK Is Used
Machine Tool Lubrication
Feed a 3/4in line to a CNC lathe's way-lubrication system, where the lower 0.4 MPa ceiling prevents over-pressurizing metering units.
Assembly Press Stations
Supply a multi-station pneumatic press with regulated air at 0.3 MPa, using the automatic drain to handle condensate in a humid plant.
Packaging Line Air Prep
Protect a carton-sealing machine's cylinders and valves with filtered, lubricated air at a stable 0.35 MPa, reducing wear on moving parts.
Is the Airtac GAFC Air Service Unit GAFC500N20ALK the Right Air-Prep Unit?
Choose the GAFC500N20ALK when a 3/4in port and a lower regulated pressure of 0.15-0.4 MPa (20-58 psi) match your machine's needs. The automatic drain clears condensate without operator attention, and the nylon bowl is a build choice - confirm it suits your environment, as the catalogue gives no material-specific ratings. The 40 um element is the standard grade; step up to the 5 um W option if your downstream valves need finer filtration. The reverse-flow (reflux) valve is fitted, and the gauge reads in MPa and psi for the PT thread. Spare parts are the GAFR500-20 filter-regulator and GAL500-20 lubricator, both orderable separately.
With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated range, so plan your inlet pressure accordingly.
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 GAFC500N20ALK 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 the recommended lubricant is ISO VG 32. It has a 108 cc condensate bowl and a 225 cc oil bowl, with a total weight of 1910 g.
The L code sets the regulation ceiling to 0.4 MPa instead of the standard 0.9 MPa, which is ideal for sensitive equipment that must never see higher pressure. The K code means a reverse-flow (reflux) valve is fitted, as shown in the catalogue's pneumatic symbol. The nylon bowl is named by the N code, and the automatic drain handles condensate removal without manual intervention.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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