Airtac GAFC Air Service Unit GAFC50020LWK
The AirTAC Airtac GAFC Air Service Unit GAFC50020LWK 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 GAFC50020LWK
This AirTAC GAFC50020LWK is a two-piece F.R.L. combination: the filter and regulator share one body, and the lubricator is mounted beside them on a T-bracket. Air enters the 3/4in port, gets filtered and set to pressure, then oil mist is added downstream. The lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), and the 5 um element traps fine particles for sensitive equipment.
The PC bowl holds 108 cc of condensate, while the oil bowl holds 225 cc, so the unit runs longer between refills than smaller bodies. At 1910 g, it needs a proper panel or frame mount rather than support from the tubing. A circular gauge is fitted, reading MPa/psi on the PT thread, and the reverse-flow valve is included per the K code.
Airtac GAFC Air Service Unit GAFC50020LWK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020LWK |
|---|---|
| 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 GAFC50020LWK
| 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. |
| 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 GAFC50020LWK Is Used
Machine Tool Lubrication
Feed a CNC lathe's way-lube system with filtered, regulated air and a metered oil mist. The 5 um element protects precision metering valves, and the 225 cc oil bowl supports longer production runs between refills.
Assembly Press Station
Supply a pneumatic press used for bearing insertion. The lower-pressure range suits delicate pressing force, while the semi-auto drain keeps condensate from reaching the press cylinder on cyclic operation.
Test Bench Air Supply
Provide clean, regulated air to a leak-test fixture with a downstream lubricator for the test cylinder. The 5 um element and 0.4 MPa ceiling match the low-pressure requirements of sensitive test instrumentation.
Is the Airtac GAFC Air Service Unit GAFC50020LWK the Right Air-Prep Unit?
Choose the GAFC500 when you need a 3/4in port and the capacity to feed a machine header. The lower-pressure L type tops out at 0.4 MPa, so if your process ever needs more than that, step to the standard S type instead. The 5 um element suits precision valves or instrument air but will need more frequent service than the standard 40 um. The PC bowl is the default build; confirm it suits your environment, as the catalogue gives no material-specific ratings. The semi-auto drain dumps condensate on pressure drop, with a manual backup for on-demand use. The gauge reads MPa/psi, matching the PT thread. Spares 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 GAFC50020LWK FAQ
The GAFC50020LWK is a lower-pressure F.R.L. combination with a 3/4in port. It operates from 0.15 to 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 it uses ISO VG 32 lubricant. The drain bowl holds 108 cc, the oil bowl 225 cc, and the unit weighs 1910 g. It has a 5 um element and a fitted gauge reading MPa/psi.
The L in the code specifies the lower-pressure type, regulating from 0.15 to 0.4 MPa instead of the standard 0.15 to 0.9 MPa. This suits applications needing gentle, consistent pressure. The K code means a reverse-flow (reflux) valve is fitted, as shown in the catalogue's pneumatic symbol. The semi-auto drain and manual drain are both included, and the 5 um element provides finer filtration.
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Standard models are processed and dispatched in 3-5 business days.
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