Airtac GAFC Air Service Unit GAFC500C20ASK
The AirTAC Airtac GAFC Air Service Unit GAFC500C20ASK 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 - 0.9 MPa (20 - 130 psi).
- TypeF.R.L. combination
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialMetal
- 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 GAFC500C20ASK
This GAFC500C20ASK is a two-piece F.R.L. combination: the filter and regulator share one body, and the lubricator is mounted on the same T-bracket with quick clamps. Air is cleaned and set to pressure in the first body, then the lubricator adds a metered oil mist last, so oil never travels back through the regulator seat. With a 3/4in port and a 1910 g mass, this unit belongs to the larger size class and needs a proper panel or frame mount rather than support from the tubing.
The metal bowl is specified by the C code, and the common specification of 1.0 MPa (145 psi) maximum and -5 to 70 C applies regardless of bowl material, so confirm the metal suits your environment. The working range is 0.15-0.9 MPa (20-130 psi) with a 40 um element, and a circular gauge is fitted reading MPa/psi. The automatic drain clears condensate without an operator, which suits unattended lines, and the reverse-flow (reflux) valve is fitted as an ordering difference.
Airtac GAFC Air Service Unit GAFC500C20ASK Technical Specifications
| Model | Airtac GAFC Air Service Unit GAFC500C20ASK |
|---|---|
| Series | GAFC500 F.R.L. combination |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| Bowl material | Metal |
| 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 GAFC500C20ASK
| GAFC500 | GA500 series F.R.L. unit — sets ports, bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. 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). |
| (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 GAFC500C20ASK Is Used
Machine tool coolant systems
Feed a 3/4in header on a CNC lathe or milling center, where the automatic drain and 108 cc bowl handle condensate from high-humidity shop air without daily attention.
Multi-station assembly presses
Supply regulated air to pneumatic presses on a transfer line, where the 0.15-0.9 MPa range covers clamping and pressing duties and the 225 cc oil bowl keeps lubricators filled longer between shifts.
Pallet conveyor diverters
Operate diverters and stops on a pallet conveyor, where the 3/4in port supports multiple actuators and the metal bowl suits a dusty environment without needing frequent bowl changes.
Is the Airtac GAFC Air Service Unit GAFC500C20ASK the Right Air-Prep Unit?
Choose this GAFC500C20ASK when you need a 3/4in port with a 108 cc condensate bowl and a 225 cc oil bowl, giving a longer service interval than the GAFC400's 100 cc and 185 cc bowls. The automatic drain handles wet lines without manual attention, and the metal bowl is a build choice for the environment, though the catalogue gives no impact or chemical data, so confirm compatibility. The standard type regulates from 0.15 to 0.9 MPa (20-130 psi), the 40 um element is the default grade, and the PT thread sets the gauge scale to MPa/psi. The reverse-flow valve is fitted per the K code. If the line must stay oil-free, omit the lubricator and choose a plain GAFR500-20 filter-regulator instead; otherwise the spares are GAFR500-20 and GAL500-20. With a 1.0 MPa max supply, there is only about 0.1 MPa above the 0.9 MPa top of the regulated range, so plan the supply 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 GAFC500C20ASK FAQ
The GAFC500C20ASK operates from 0.15 to 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). The temperature range is -5 to 70 C, and the recommended lubricant is ISO VG 32. It has a 108 cc drain bowl and a 225 cc oil bowl, weighs 1910 g, and uses a 40 um element. The automatic drain clears condensate without operator intervention.
The C code specifies a metal bowl, which is a build choice for the environment, though the catalogue does not provide impact or chemical resistance data, so confirm it suits your surroundings. The K code means the reverse-flow (reflux) valve is fitted, which the catalogue shows as a separate pneumatic symbol. The gauge is fitted and reads in MPa/psi due to the PT thread.
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