Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK 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 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialMetal
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK
The GAFR500C20ASJK is a filter and regulator combined into one body, so a single unit both cleans incoming air and holds a steady outlet pressure. This 3/4in model is built for a 950 g machine header, with a metal bowl and a 108 cc condensate chamber.
It operates across 0.15-0.9 MPa (20-130 psi) with a 40 um element, and the automatic drain clears collected water without manual attention. The pressed-in self-locking knob resists set-pressure drift from vibration, and the circular gauge with clip and magnifier saves panel space.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK |
|---|---|
| Series | GAFR500 filter & regulator |
| 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 |
| Bracket | Not included (J) |
| Weight | 950 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK
| 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. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 psi). This body offers Standard (S) or Lower pressure (L). |
| J | No bracket (J) — supplied without the mounting bracket. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR500C20ASJK Is Used
Machine header supply
Feed a multi-station assembly machine with a single 3/4in line, using the automatic drain to handle condensate from a wet compressor room.
CNC coolant system
Regulate air for a CNC coolant pump or spindle air curtain where a steady 0.15-0.9 MPa supply is needed and the metal bowl resists shop-floor splashes.
Packaging line valves
Supply a bank of pneumatic valves on a packaging conveyor, with the 108 cc bowl reducing how often an operator must check the drain.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJK the Right Air-Prep Unit?
This GAFR500 sits above the GAFR400 (3/8in-1/2in ports, 880 g, 100 cc bowl) and below the GAFR600 (3/4in-1in ports, 1880 g, 205 cc bowl), so it suits a mid-size machine header or a multi-station line. The metal bowl is a build choice for demanding environments, and the automatic drain suits unattended or wet lines. The J code means no mounting bracket is included, so plan for a panel mount or an existing bracket. The 40 um element is the standard grade, and the PT thread gives an MPa/psi gauge scale. The K code adds the reverse-flow (reflux) valve as an ordering difference only. If oil is needed downstream, order the matching GAFC500-20 combination instead. Note that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the 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
- ✓ 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 GAFR500C20ASJK FAQ
The GAFR500C20ASJK is a filter & regulator with a 3/4in port, working pressure 0.15-0.9 MPa (20-130 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 40 um element, 108 cc drain bowl, and 950 g weight. It has a metal bowl, automatic drain, no mounting bracket, a fitted gauge, and a reverse-flow valve.
The K code means the reverse-flow (reflux) valve is fitted. It is an ordering difference only; the catalogue does not specify its function in our data. This unit still filters and regulates in one body, with no lubricator.
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