Airtac GAFC Air Service Unit GAFC50020ALK
The AirTAC Airtac GAFC Air Service Unit GAFC50020ALK 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 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 GAFC50020ALK
This GAFC50020ALK combines a filter-regulator and a lubricator on a single T-bracket, so the air is cleaned, set to pressure, and then oil-misted in one compact assembly. The 3/4in port and 1910 g weight place it in the mid-large size class, suited for feeding a machine header or a multi-station line.
The lower-pressure regulator tops out at 0.4 MPa (20-58 psi), which suits gentle handling or low-force actuation. The 40 um element handles standard workshop air, and the 108 cc condensate bowl plus 225 cc oil bowl mean fewer refill stops than smaller bodies in the GAFC range.
Airtac GAFC Air Service Unit GAFC50020ALK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020ALK |
|---|---|
| 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. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
Model Code: Airtac GAFC Air Service Unit GAFC50020ALK
| 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). |
| (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 GAFC50020ALK Is Used
Machine Header Supply
Feed a 3/4in header on a stamping press or assembly machine, where the lower pressure range protects delicate tooling from over-pressurization.
Low-Force Actuators
Run soft-touch grippers or vacuum generators on a packaging line, keeping the regulated output below 0.4 MPa for consistent, gentle handling.
Multi-Station Workcell
Supply a bank of cylinders on a rotary index table, where the 108 cc condensate bowl and 225 cc oil bowl reduce maintenance intervals.
Is the Airtac GAFC Air Service Unit GAFC50020ALK the Right Air-Prep Unit?
Choose the GAFC500 body for a 3/4in port with a 7000 L/min flow curve at 0.7 MPa inlet, a step up from the GAFC400's 6000 L/min envelope. The PC bowl is the standard build, and the automatic drain clears condensate without an operator, ideal for lines that run unattended. The L type limits you to 0.15-0.4 MPa, so if the machine may ever need more than 0.4 MPa, pick the S type instead. A circular gauge is fitted, reading MPa/psi for the PT thread, and the reverse-flow (reflux) valve is included. Spares are orderable as GAFR500-20 and GAL500-20. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan the inlet pressure accordingly.
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 GAFC50020ALK FAQ
The GAFC50020ALK 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). The temperature range is -5 to 70 C, and the recommended lubricant is ISO VG 32. It has a 108 cc condensate bowl, a 225 cc oil bowl, and weighs 1910 g.
The L type is designed for applications that never need more than 0.4 MPa, such as low-force clamping or air bearings. If the machine may ever require higher pressure, the S type with a 0.9 MPa ceiling is the safer choice, since the regulator cannot output above its set range.
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Covers non-human-caused product damage.
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