Airtac GAFC Air Service Unit GAFC50020ASNWK
The AirTAC Airtac GAFC Air Service Unit GAFC50020ASNWK 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 - 0.9 MPa (20 - 130 psi).
- TypeF.R.L. combination
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade5 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 GAFC50020ASNWK
This GAFC50020ASNWK is a two-piece F.R.L. combination: a filter-regulator body paired with a lubricator on a shared T-bracket. The 3/4in port and 1910 g mass place it in the mid-large size class, suited for machine headers or multi-station lines where a smaller unit would struggle. The 5 um element traps fine particles for sensitive valves, while the automatic drain clears condensate without operator attention.
The standard pressure range is 0.15-0.9 MPa (20-130 psi), with a 1.0 MPa (145 psi) maximum supply. The 108 cc condensate bowl and 225 cc oil bowl set the service interval - larger than GAFC400's 100 cc drain bowl, so this unit needs less frequent attention. The reverse-flow (reflux) valve is fitted, and the gauge connection is 1/4in if you add one later.
Airtac GAFC Air Service Unit GAFC50020ASNWK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC50020ASNWK |
|---|---|
| Series | GAFC500 F.R.L. combination |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| 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 GAFC50020ASNWK
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 psi). This body offers Standard (S) or Lower pressure (L). |
| N | No pressure gauge; 1/4" gauge connection. |
| 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 GAFC50020ASNWK Is Used
Machine Tool Coolant Systems
Feed a 3/4in header supplying coolant valves and clamping cylinders on CNC lathes, where the 5 um element protects precision spools from fine swarf.
Multi-Station Assembly Lines
Power pneumatic pushers and stops across a 20-meter conveyor section, with the automatic drain handling condensate from long supply runs.
Packaging Film Winders
Supply tension-control brakes and dancer-roll cylinders on film winders, where consistent 0.15-0.9 MPa regulation keeps web tension stable.
Is the Airtac GAFC Air Service Unit GAFC50020ASNWK the Right Air-Prep Unit?
Choose GAFC500 for 3/4in piping that feeds multiple actuators or a machine manifold. The PC bowl is the standard build; confirm it suits your environment before ordering. The automatic drain (A) means no manual dumping, ideal for wet or unattended lines. The 5 um element (W) filters finer than the standard 40 um but requires more frequent replacement. PT threads with MPa/psi gauge scale are standard. The no-gauge option (N) leaves a 1/4in connection for your own gauge. Spares are GAFR500-20 and GAL500-20, both orderable separately.
The 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan inlet pressure carefully if you need the full output.
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 GAFC50020ASNWK FAQ
The working pressure range is 0.15-0.9 MPa (20-130 psi), with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Operating temperature 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 3/4in port handles the flow curve plotted to 7000 L/min at 0.7 MPa inlet.
The N after the port code means no gauge is supplied - the 1/4in gauge connection is there if you add one. The K code means a reverse-flow (reflux) valve is fitted, shown as a separate symbol in the catalogue. The automatic drain (A) clears condensate without manual intervention, and the 5 um element (W) provides finer filtration than the standard 40 um.
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