Airtac GAFC Air Service Unit GAFC50020LNWK
The AirTAC Airtac GAFC Air Service Unit GAFC50020LNWK 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
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- 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 GAFC50020LNWK
This GAFC50020LNWK is a two-piece F.R.L. combination: a GA-series filter-regulator joined on a T bracket to a GA-series lubricator. The 3/4in port and 1910 g mass put it in the upper-middle size class, suited to a machine header feeding several actuators rather than a single small cylinder.
Air enters the first body where the 5 um element traps fine particles and the regulator sets pressure to 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. The 108 cc condensate bowl and 225 cc oil bowl define the service interval; the lower-pressure type tops out at 0.4 MPa, so confirm the line never needs more.
Airtac GAFC Air Service Unit GAFC50020LNWK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020LNWK |
|---|---|
| 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 | 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. No gauge is supplied with this model — the gauge connection on a GAFC500 is 1/4" if you add one.
Model Code: Airtac GAFC Air Service Unit GAFC50020LNWK
| 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". |
| (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). |
| N | No pressure gauge; 1/4" gauge connection. |
| 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 GAFC50020LNWK Is Used
Machine Tool Header
Feed a 3/4in header on a CNC lathe or milling machine where multiple cylinders and clamps need filtered, regulated air at a stable low pressure.
Assembly Line Lubrication
Supply oil-misted air to a multi-station assembly line with pneumatic screwdrivers or riveters that require consistent lubrication for tool life.
Low-Pressure Test Rig
Power a test fixture that cycles valves or actuators at pressures up to 0.4 MPa, where the 5 um filter protects sensitive instrumentation from particle contamination.
Is the Airtac GAFC Air Service Unit GAFC50020LNWK the Right Air-Prep Unit?
The L type regulates 0.15-0.4 MPa (20-58 psi), a deliberate choice for low-pressure circuits; if the machine may ever need more than 0.4 MPa, this is the wrong part. The 5 um element traps finer particles than the standard 40 um, at the cost of more frequent element service. No gauge is supplied, so the set pressure cannot be read without adding one to the 1/4in gauge connection. The semi-auto drain dumps condensate on each pressure drop, with a manual drain for on-demand use; the PC bowl is the standard build, and the reverse-flow (reflux) valve is fitted. Spares are orderable as GAFR500-20 and GAL500-20. With a 1.0 MPa max supply, there is about 0.6 MPa of headroom above the 0.4 MPa top of this unit's 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 GAFC50020LNWK FAQ
This 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 proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C, and the recommended lubricant is ISO VG 32. The drain bowl holds 108 cc and the oil bowl 225 cc, with a total weight of 1910 g.
The N after the port code means no gauge is supplied; the 1/4in gauge connection is there if you add one later. The K code indicates a reverse-flow (reflux) valve is fitted, shown as a separate pneumatic symbol in the catalogue. The L code sets the lower pressure range of 0.15-0.4 MPa.
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