Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK is a genuine two-in-one filter & regulator — a diversion-type water/particulate filter and a balanced pressure regulator built into ONE body. It has 3/4" ports, a 40 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK
The GAFR500C20ALNK is a filter and regulator combined in one body, so incoming air is cleaned and then set to a steady outlet pressure without needing separate units. This 3/4in model works in the lower 0.15-0.4 MPa (20-58 psi) band and uses a 40 um element to trap particles.
The metal bowl holds 108 cc of condensate, and the automatic drain clears it without manual attention. A reverse-flow valve is fitted as an ordering difference, and the unit weighs 950 g, which signals a machine-header class component rather than a small jig accessory.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK |
|---|---|
| Series | GAFR500 filter & regulator |
| 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 |
| Bracket | Included |
| Weight | 950 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. No gauge is supplied with this model — the gauge connection on a GAFR500 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-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) | Mounting bracket included. |
| N | No pressure gauge; 1/4" gauge connection. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| K | Reverse-flow (reflux) valve attached. |
The filter and the regulator are ONE body here — there is no separate GAF filter or GAR regulator part to assemble. Need lubrication downstream too? Add a lubricator by ordering the matching GAFC500-20 F.R.L. combination instead.
Size Class & Flow Envelope
- GAFR2001/8"-1/4" · 2000 L/min
- GAFR3001/4"-1/2" · 3500 L/min
- GAFR4003/8"-1/2" · 7000 L/min
- GAFR5003/4" · 8000 L/min
- GAFR6003/4"-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 | GAFR500 · 3/4" · curve to 8000 L/min |
|---|---|
| One size down | GAFR400 |
| One size up | GAFR600 (curve to 12000 L/min) |
| Add a lubricator | GAFC500-20 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK Is Used
Machine header supply
Feed a medium machine header that runs several pneumatic actuators, where the 3/4in port and 8000 L/min envelope at 0.7 MPa inlet support simultaneous demand.
Lower-pressure station
Set a delicate assembly station to a precise 0.3 MPa outlet, using the L-type range to avoid over-pressuring sensitive tooling.
Unattended line
Install on a remote or overnight line where the automatic drain clears condensate without an operator, reducing maintenance visits.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK the Right Air-Prep Unit?
Choose the GAFR500 when a 3/4in port and 950 g mass fit a medium line feeding multiple stations; the flow curve is plotted to 8000 L/min at 0.7 MPa inlet, so it steps up from the GAFR400's 7000 L/min envelope. The metal bowl suits demanding environments, while the automatic drain handles wet or unattended lines, and the included bracket eases mounting. Since the gauge is omitted, the 1/4in gauge connection is ready for a later add-on, and the PT thread matches MPa/psi scale gauges. If oil is needed downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa above the 0.4 MPa top of the range, which is ample headroom for stable regulation.
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
- ✓ Bracket kept or removed (J); add a lubricator = GAFC
Installation & Maintenance Notes
- check Install with the airflow arrow: IN to OUT, gauge/knob accessible.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure with the pressed-in self-locking knob; pull to adjust, press to lock.
- check Drain condensate before the 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 950 g unit on its bracket, not on the tubing.
This is a filter and regulator only — it delivers filtered, pressure-set air with no added oil. If a downstream tool needs lubrication, add a separate lubricator or order the GAFC500-20 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ALNK FAQ
Working pressure is 0.15-0.4 MPa (20-58 psi), with a 1.0 MPa (145 psi) maximum and 1.5 MPa (215 psi) proof pressure. Temperature range is -5 to 70 C, the metal drain bowl holds 108 cc, and the unit weighs 950 g with a 3/4in port.
The L code sets regulation from 0.15 to 0.4 MPa, which suits applications needing gentle, stable pressure rather than high flow. If your machine may require more than 0.4 MPa, this is the wrong part, and you should select a standard S-type unit instead.
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