Airtac GAFC Air Service Unit GAFC500N20LWK
The AirTAC Airtac GAFC Air Service Unit GAFC500N20LWK 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
- Drainsemi-auto + manual
- 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 GAFC500N20LWK
This AirTAC GAFC500N20LWK is an F.R.L. combination where the filter and regulator share one body, and a lubricator is added on a T-bracket with quick clamps. With a 3/4in port and a 1910 g mass, it suits a machine header or a multi-station line where a smaller unit would be undersized. The nylon bowl is specified by the N code, and the 5 um element traps finer particles than the standard 40 um grade.
Air enters the first body, where solids and moisture are removed and pressure is set to the lower range of 0.15-0.4 MPa (20-58 psi). The lubricator then adds a metered oil mist downstream, so oil never passes back through the regulator seat. A circular gauge is fitted and reads in MPa and psi, matching the PT thread. The reverse-flow valve is also fitted, as indicated by the K code.
Airtac GAFC Air Service Unit GAFC500N20LWK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500N20LWK |
|---|---|
| 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 | Semi-auto drain + manual 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 GAFC500N20LWK
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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 GAFC500N20LWK Is Used
Machine header feed
Feed a 3/4in machine header on a stamping press or injection molder, where the lower pressure range protects sensitive downstream valves and the 5 um element keeps them clean.
Multi-station assembly line
Supply a multi-station assembly line with filtered, regulated, oil-misted air at a consistent 0.3 MPa setpoint, reducing the risk of over-pressuring delicate actuators.
Instrument air for gauging
Provide 5 um filtered air to a precision gauging station that runs at low pressure, where the fine element protects measurement orifices from particle wear.
Is the Airtac GAFC Air Service Unit GAFC500N20LWK the Right Air-Prep Unit?
This GAFC500N20LWK is a lower-pressure unit, topping out at 0.4 MPa (58 psi) instead of the standard 0.9 MPa (130 psi). If your machine may ever need more than 0.4 MPa, this is the wrong part - choose the S type instead. The 5 um element is a fine filter grade for precision valves or instrument air, but it will need more frequent service than a 40 um element. The semi-auto drain dumps condensate on each pressure drop, and the manual drain works on demand; both are fitted. The nylon bowl is a build choice - the catalogue gives no impact or chemical data, so confirm it suits your surroundings. The gauge is fitted and reads MPa/psi for the PT thread. The reverse-flow valve is fitted. Spares are the GAFR500-20 filter-regulator and the 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 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 GAFC500N20LWK FAQ
This lower-pressure F.R.L. combination operates at 0.15-0.4 MPa (20-58 psi) with a max pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C. It has a 108 cc drain bowl and a 225 cc oil bowl, weighs 1910 g, and uses ISO VG 32 or equivalent lubricant. The element is 5 um.
The N before the port code specifies a nylon bowl - a material choice, though the catalogue provides no impact or chemical resistance data, so confirm it fits your environment. The K at the end indicates the reverse-flow valve is fitted, shown as a separate pneumatic symbol in the catalogue. Both are ordering-code options that change the build of the unit.
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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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