Airtac GAFC Air Service Unit GAFC50020ALN
The AirTAC Airtac GAFC Air Service Unit GAFC50020ALN 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 materialPC
- Drainautomatic
- 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 GAFC50020ALN
This AirTAC GAFC50020ALN is a two-piece F.R.L. combination: a filter-regulator body paired with a lubricator on a shared T-bracket. With a 3/4" port and 1910 g mass, it suits mid-size machine headers where a single 3/4" line feeds several actuators. The lower-pressure regulator tops out at 0.4 MPa (58 psi), so it fits low-force clamping or gentle air blow-off tasks.
The automatic drain clears condensate from the 108 cc bowl without operator attention, while the 225 cc oil bowl keeps the lubricator running between services. No gauge is fitted, so the set pressure cannot be read directly; the 1/4" gauge connection allows adding one later. The 40 um element handles standard shop air, and the unit operates from -5 to 70 C without freezing.
Airtac GAFC Air Service Unit GAFC50020ALN Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020ALN |
|---|---|
| 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 | PC |
| 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. 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 GAFC50020ALN
| 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". |
| 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). |
| N | No pressure gauge; 1/4" gauge connection. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| (blank) | No reverse-flow valve. |
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 GAFC50020ALN Is Used
Low-force clamping fixtures
Feed a multi-point clamping fixture on a CNC machine where each clamp needs only 0.3 MPa. The lower-pressure regulator prevents over-clamping delicate parts, and the automatic drain keeps the bowl clear during long production runs.
Air blow-off stations
Supply a parts-cleaning blow-off station with regulated air at 0.35 MPa. The 3/4" port delivers enough volume for multiple nozzles, while the lubricator adds a fine oil mist to protect downstream valves and cylinders.
Assembly line tooling
Run a semi-automated assembly station with pneumatic screwdrivers and small actuators. The 225 cc oil bowl supports extended operation between refills, and the 108 cc drain bowl handles typical condensate from a compressor line.
Is the Airtac GAFC Air Service Unit GAFC50020ALN the Right Air-Prep Unit?
Choose the GAFC50020ALN when your line needs 3/4" ports and a regulated ceiling of 0.4 MPa (20-58 psi). The L-type regulator is the key differentiator: if your machine may ever demand more than 0.4 MPa, select a standard S-type unit instead. The automatic drain suits unattended operation, while the PC bowl is a build choice - confirm it fits your environment, as the catalogue gives no material-specific ratings. The 40 um element is the default; upgrade to a 5 um element (W code) for finer filtration. PT threads with an MPa/psi gauge scale are standard, and the reverse-flow valve (K) is not fitted. 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 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 GAFC50020ALN FAQ
The GAFC50020ALN 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). It works in -5 to 70 C temperatures and uses ISO VG 32 oil. The drain bowl holds 108 cc, the oil bowl 225 cc, and the unit weighs 1910 g. It has a 3/4" port, 40 um element, and automatic drain.
The N in the code means no gauge is supplied. The GAFC500 body has a 1/4" gauge connection, so you can add a circular gauge later if needed. Without one, you cannot read the set pressure directly on the unit, so plan to install a gauge or rely on a downstream sensor for monitoring.
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