Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJNK 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 gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJNK
The GAFR500C20ASJNK is a filter and regulator in a single body, combining a diversion-type water separator with a balanced pressure regulator. This 3/4in unit handles 0.15-0.9 MPa (20-130 psi) and filters to 40 um, with a metal condensate bowl and an automatic drain.
This model ships without a mounting bracket and without a gauge; the 1/4in gauge connection is ready for a field-installed unit. A reverse-flow (reflux) valve is fitted, and the pressed-in self-locking knob resists set-pressure drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJNK |
|---|---|
| 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. 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 GAFR500C20ASJNK
| 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. |
| 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 GAFR500C20ASJNK Is Used
Machine header supply
Feed a 3/4in machine header serving multiple pneumatic actuators, where the 8000 L/min plotted flow envelope at 0.7 MPa inlet supports several stations from one regulated point.
Automated assembly line
Protect precision assembly tools and cylinders from water and 40 um particles, with the automatic drain reducing maintenance on a busy production line.
Process equipment skid
Mount on a process skid where the metal bowl and reflux valve are specified, and the 950 g mass requires a rigid bracket or panel for secure installation.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20ASJNK the Right Air-Prep Unit?
Choose the GAFR500 body for 3/4in piping where a 950 g unit needs frame or panel support, not tubing. The metal bowl suits demanding environments, while the automatic drain handles unattended operation. This J-code version omits the bracket, and the N-code means no gauge is supplied; the 1/4in connection allows adding one. The 40 um element is standard, and the PT thread matches MPa/psi gauge scales. The K-code reverse-flow valve is fitted as an ordering difference. If downstream lubrication is needed, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.1 MPa above the 0.9 MPa top of the regulated 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 GAFR500C20ASJNK FAQ
The GAFR500C20ASJNK is a filter & regulator with a 3/4in port, 0.15-0.9 MPa (20-130 psi) working range, 1.0 MPa (145 psi) max pressure, and 1.5 MPa (215 psi) proof pressure. It operates from -5 to 70 C, has a 108 cc drain bowl, and weighs 950 g. The 40 um element and automatic drain are standard.
The C code specifies a metal bowl, chosen for demanding environments. The N code after the port means no gauge is included; the 1/4in gauge connection is provided for adding one. The J code omits the mounting bracket, and the K code adds a reverse-flow valve.
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