Airtac GAFC Air Service Unit GAFC50020LN
The AirTAC Airtac GAFC Air Service Unit GAFC50020LN 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
- 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 GAFC50020LN
This GAFC50020LN is a two-piece F.R.L. combination: a filter-regulator body handles filtration and pressure control, then a separate lubricator adds a metered oil mist downstream. With a 3/4in port and a 1910 g mass, it suits a machine header or a multi-station line rather than a single small actuator. The lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), with a 40 um filter element as standard.
The PC bowl holds 108 cc of condensate, while the oil bowl holds 225 cc, so service intervals are generous for a line this size. No gauge is supplied with this model, but the 1/4in gauge connection is ready for one if you need to read the set pressure. The semi-auto drain dumps condensate each time pressure drops, and the manual drain gives you on-demand control.
Airtac GAFC Air Service Unit GAFC50020LN Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020LN |
|---|---|
| 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 | 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 GAFC50020LN
| 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. |
| (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 GAFC50020LN Is Used
Machine tool coolant systems
Feed a 3/4in header supplying coolant valves and clamping cylinders on a CNC lathe, where the lower pressure range protects sensitive metering units.
Assembly line pallet stops
Run a multi-station pallet conveyor with 3/4in drops to stop cylinders, keeping the regulated pressure low to avoid jarring the workpiece fixtures.
Test bench air supply
Supply a laboratory test bench with 3/4in air for leak-test fixtures, using the 0.4 MPa ceiling to match delicate test pressures.
Is the Airtac GAFC Air Service Unit GAFC50020LN the Right Air-Prep Unit?
Choose the GAFC500 body when your line needs 3/4in ports and a 7000 L/min flow envelope at 0.7 MPa inlet. The lower-pressure L type tops out at 0.4 MPa, so confirm your actuators never need more than that; if they might, step up to the standard S type. The PC bowl is the default build, and the catalogue gives no material-specific data, so confirm it suits your environment. The semi-auto plus manual drain pair is fitted; the automatic drain is the A option if you want unattended operation. The 40 um element is standard, with a 5 um W option for finer filtration. The PT thread comes with a MPa/psi gauge scale, though this model ships without a gauge. Spare parts are orderable as GAFR500-20 and GAL500-20. 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 GAFC50020LN FAQ
This lower-pressure F.R.L. combination operates from 0.15 to 0.4 MPa (20-58 psi), with a maximum supply 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 condensate bowl and a 225 cc oil bowl, weighs 1910 g, and uses ISO VG 32 lubricant. The port size is 3/4in.
The N in the code means no gauge is supplied. The GAFC500 body has a 1/4in gauge connection, so you can add a circular gauge later if you need to read the set pressure. Without one, you cannot verify the regulated output visually.
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