Airtac GAC F.R.L. Unit GAC500C20ALK
The AirTAC Airtac GAC F.R.L. Unit GAC500C20ALK is a genuine three-unit F.R.L. combination — a filter, a pressure regulator and a lubricator pre-assembled on one 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 materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight2460 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 GAC F.R.L. Unit GAC500C20ALK
Delivering cleaned, regulated and lubricated air for heavy pneumatic lines, the GAC500C20ALK is a complete F.R.L. combination built around a 3/4in port. This lower-pressure type regulates between 0.15-0.4 MPa (20-58 psi), utilizing a 40 um element to capture particulate before the air reaches downstream moving parts. A circular gauge is fitted, reading MPa/psi for the default PT thread.
The assembly integrates a filter, regulator and lubricator on a single L-shape bracket with quick mounting clamps, eliminating inter-unit tubing. Because the lubricator sits last in the sequence, oil mist is added downstream of the regulator seat, preventing fouling. Weighing 2460 g, this unit requires a solid panel or frame mount rather than tubing support. The metal bowl and automatic drain suit wet, unattended environments, while the reverse-flow (reflux) valve is fitted as a distinct ordering option shown as a separate pneumatic symbol in the catalogue.
Airtac GAC F.R.L. Unit GAC500C20ALK Technical Specifications
| Model | Airtac GAC F.R.L. Unit GAC500C20ALK |
|---|---|
| Series | GAC500 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 | 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 | 2460 g |
Specifications follow the official AirTAC GAC catalogue (pages 216-217). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code.
Model Code: Airtac GAC F.R.L. Unit GAC500C20ALK
| GAC500 | 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. |
| 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: GAF500-20 filter, GAR500-20 regulator, GAL500-20 lubricator — all three share this body and port.
Size Class & Flow Envelope
- GAC2001/8"-1/4" · 1750 L/min
- GAC3001/4"-1/2" · 3000 L/min
- GAC4003/8"-1/2" · 6000 L/min
- GAC5003/4" · 7000 L/min
- GAC6003/4"-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 | GAC500 · 3/4" · curve to 7000 L/min |
|---|---|
| One size down | GAC400 |
| One size up | GAC600 (curve to 12000 L/min) |
| Build order | Filter → bracket → regulator → lubricator |
Where the Airtac GAC F.R.L. Unit GAC500C20ALK Is Used
Automotive Assembly Lines
Feeds large bore cylinders and multi-station headers on a production line where a steady, lower-pressure air supply and continuous lubrication protect heavy tooling.
Palletizing Robots
Conditions air for large pneumatic grippers handling pallets, ensuring the 40 um element prevents valve wear while the metal bowl withstands an industrial setting.
Heavy Material Handling
Supplies air to dense actuator networks on extended conveying systems, using the automatic drain to expel condensate without halting the 3/4in feed line.
Is the Airtac GAC F.R.L. Unit GAC500C20ALK the Right Air-Prep Unit?
Choose this 3/4in body for substantial air flows, noting the catalogue flow curve for the GAC500 is plotted to 7000 L/min at 0.7 MPa inlet. If a machine might ever exceed 0.4 MPa, the L type is the wrong part, as it tops out at roughly 44% of the Standard type's 0.9 MPa ceiling. The automatic drain clears condensate without an operator, which is decisive for unattended stations, and the 108 cc drain bowl paired with a 225 cc oil bowl sets the maintenance interval. If the downstream line must stay oil-free, choose a filter-regulator instead, as this unit adds oil mist. Replacement spares follow the body-port suffix exactly: GAF500-20, GAR500-20 and GAL500-20. Stepping up to the GAC600 roughly doubles the flow envelope to 12000 L/min at 0.7 MPa inlet, offering a 1.7x capacity increase over this body.
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 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 2460 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 filter-regulator instead of an F.R.L. combination on that branch.
Airtac GAC F.R.L. Unit GAC500C20ALK FAQ
This lower-pressure type operates at 0.15-0.4 MPa (20-58 psi) with a maximum pressure of 1.0 MPa (145 psi) and a proof pressure of 1.5 MPa (215 psi). The temperature range is -5 to 70 C, the filtering grade is 40 um, and the recommended lubricant is ISO VG 32. It features a 108 cc drain bowl, a 225 cc oil bowl, and weighs 2460 g.
The K indicates that a reverse-flow (reflux) valve is fitted to this unit. The catalogue lists this as a separate pneumatic symbol with details on its own page, representing a specific ordering variation rather than a standard internal component.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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