Airtac GAFC Air Service Unit GAFC500N20LK
The AirTAC Airtac GAFC Air Service Unit GAFC500N20LK 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
- 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 GAFC500N20LK
The GAFC500N20LK is a two-piece F.R.L. combination built for 3/4in air lines. A filter and regulator share one body to clean the air and set pressure, then a separate lubricator adds a controlled oil mist downstream. This lower-pressure version regulates from 0.15 to 0.4 MPa (20-58 psi), with a 40 um element and a circular gauge reading MPa/psi.
The nylon bowls hold 108 cc for condensate and 225 cc for oil, and the whole unit weighs 1910 g. The catalogue flow curve is plotted to 7000 L/min at 0.7 MPa inlet, which serves as a sizing envelope rather than a rated capacity. A reverse-flow valve is fitted, and the semi-auto drain dumps condensate each time pressure drops.
Airtac GAFC Air Service Unit GAFC500N20LK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500N20LK |
|---|---|
| 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 | 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 GAFC500N20LK
| 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. |
| (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 GAFC500N20LK Is Used
Low-Pressure Assembly Stations
Feed a 3/4in manifold serving pneumatic torque tools and presses that operate below 0.4 MPa, where the lower-pressure regulator provides finer adjustment.
Paint Spray Booths
Supply filtered, regulated air to spray guns and fluid pumps in finishing lines, with the lubricator adding a fine oil mist to downstream tooling.
Packaging Line Air Prep
Protect indexing conveyors and case sealers with 40 um filtration and consistent low-pressure regulation, reducing wear on pneumatic actuators.
Is the Airtac GAFC Air Service Unit GAFC500N20LK the Right Air-Prep Unit?
Choose the GAFC500N20LK when your machine runs below 0.4 MPa and needs a 3/4in connection. The nylon bowl is a build choice, not a performance upgrade - the 1.0 MPa max and -5 to 70 C rating are identical across all bowl materials, so confirm nylon suits your environment. The semi-auto drain clears condensate on pressure drops, while the manual drain gives on-demand control. The 40 um element handles standard shop air; step to the 5 um version if you feed precision valves. The PT thread carries a MPa/psi gauge scale. Spare parts are GAFR500-20 and GAL500-20, both orderable separately.
With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above this unit's 0.4 MPa regulated ceiling.
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 GAFC500N20LK FAQ
This lower-pressure F.R.L. combination regulates from 0.15 to 0.4 MPa (20-58 psi). Maximum supply pressure is 1.0 MPa (145 psi) and proof pressure is 1.5 MPa (215 psi). It operates from -5 to 70 C and needs ISO VG 32 lubricant. The nylon drain bowl holds 108 cc, the oil bowl holds 225 cc, and the unit weighs 1910 g.
The K code specifies a reverse-flow (reflux) valve, which the catalogue draws as a separate pneumatic symbol. The N before the port code indicates a nylon bowl - a material choice that does not alter the pressure or temperature ratings. Both features are part of the factory build, so the unit arrives ready for installation.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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