Airtac GAFC Air Service Unit GAFC50020LW
The AirTAC Airtac GAFC Air Service Unit GAFC50020LW 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 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 GAFC50020LW
This GAFC50020LW is an F.R.L. combination built as two units on one T-bracket: a filter-regulator body that cleans the air and sets its pressure, followed by a lubricator that meters oil mist into the flow. The 3/4in port and 1910 g mass place it in the upper middle of the GAFC range, sized for a machine header or a multi-station line rather than a single small cylinder.
The lower-pressure regulator is set for 0.15-0.4 MPa (20-58 psi), which suits delicate grippers or low-force clamping where a standard 0.9 MPa unit would be over-specified. The 5 um element traps fine particles for sensitive valves, and the 108 cc condensate bowl plus 225 cc oil bowl mean the unit is attended less often than smaller bodies in the series.
Airtac GAFC Air Service Unit GAFC50020LW Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020LW |
|---|---|
| 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
Model Code: Airtac GAFC Air Service Unit GAFC50020LW
| 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). |
| (blank) | Circular pressure gauge fitted. |
| W | Filtering grade 5 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 GAFC50020LW Is Used
Low-force assembly cells
Set the regulator to 0.2 MPa and feed a precision pneumatic gripper that handles small electronic components, where a standard 0.9 MPa supply could damage the part.
Machine tool coolant valves
Supply a 3/4in header that operates coolant control valves on a CNC lathe, with the 5 um element protecting the fine orifices from scale and debris.
Packaging line tensioning
Regulate film tensioning cylinders on a wrapping machine, where the lower pressure range prevents over-tensioning and the 225 cc oil bowl keeps the lubricator running for long shifts.
Is the Airtac GAFC Air Service Unit GAFC50020LW the Right Air-Prep Unit?
Choose the GAFC500 body when a 3/4in line feeds several actuators or a small manifold, and the lower-pressure type when the downstream circuit must never see more than 0.4 MPa. The PC bowl is the standard build; the semi-auto drain dumps condensate each time pressure drops, while the manual drain gives on-demand control. The 5 um element is the fine-grade option, and the fitted circular gauge reads in MPa and psi for the PT thread. Spare parts are orderable separately as GAFR500-20 and GAL500-20, so a worn element does not force a full replacement. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so the regulator has ample inlet pressure to hold its setpoint.
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 GAFC50020LW FAQ
The GAFC50020LW 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). It works in -5 to 70 C temperatures, uses ISO VG 32 lubricant, and weighs 1910 g. The drain bowl holds 108 cc and the oil bowl 225 cc.
The L type caps the regulated output at 0.4 MPa, which is about 44% of the standard type's 0.9 MPa ceiling. This is ideal for circuits that must never see high pressure, such as delicate grippers or tensioning systems. If your machine may ever need more than 0.4 MPa, the standard S type is the correct choice.
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