Airtac GAFR Adjustable Filter Regulator GAFR500C20SJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR500C20SJK 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR500C20SJK
The GAFR500C20SJK is a filter and regulator combined into one body, cleaning incoming air and holding a steady outlet pressure without a separate lubricator. It uses a 3/4in port, works from 0.15 to 0.9 MPa (20-130 psi), and comes with a 40 um element.
The metal bowl holds 108 cc of condensate, and the unit weighs 950 g, placing it in the mid-large size class. A circular gauge with MPa/psi scale is fitted, and the pressed-in self-locking knob resists set-pressure drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR500C20SJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR500C20SJK |
|---|---|
| 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 | Semi-auto drain + manual 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 GAFR500C20SJK
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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 GAFR500C20SJK Is Used
Machine header supply
Feed a 3/4in header that distributes air to several machines on a production line, where the 8000 L/min plotted envelope at 0.7 MPa inlet gives sizing headroom.
Multi-station assembly
Supply a steady 0.15-0.9 MPa to multiple actuators on an assembly station, with the self-locking knob holding the setpoint despite nearby vibration.
Panel-mount retrofit
Mount this 950 g unit on an existing panel using the available bracket holes, replacing a separate filter and regulator with one body to save rail width.
Is the Airtac GAFR Adjustable Filter Regulator GAFR500C20SJK the Right Air-Prep Unit?
Choose this GAFR500 when you need a 3/4in port and a 950 g body that suits a machine header or a multi-station line. The metal bowl is a build choice, not a performance upgrade; the common 1.0 MPa max and -5 to 70 C range apply to all bowl materials. This model has the semi-auto plus manual drain, so you can either let it purge automatically or drain it by hand. The J code means no mounting bracket is included, so plan for a panel mount or an existing bracket. A 40 um element is fitted, which is the standard grade for general shop air. The PT thread gives a gauge scale in MPa/psi. The K code adds the reverse-flow (reflux) valve, an ordering difference only. If your line needs oil downstream, order the matching GAFC500-20 combination instead. Max supply of 1.0 MPa 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 GAFR500C20SJK FAQ
Working pressure is 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. The drain bowl holds 108 cc and the unit weighs 950 g. It has a 3/4in port, a 40 um element, and a metal bowl.
The K code means a reverse-flow (reflux) valve is fitted. It is an ordering difference; the catalogue does not detail its function in our data. This model also has no bracket (J) and a fitted gauge with MPa/psi scale.
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