Airtac GAFR Adjustable Filter Regulator GAFR50020SJK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SJK 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 materialPC
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020SJK
The GAFR50020SJK is a filter and pressure regulator combined into a single body, eliminating the need for separate GAF and GAR units. This 3/4in model handles a standard pressure range of 0.15-0.9 MPa (20-130 psi) and comes with a 40 um filter element, ready for typical industrial air lines.
A diversion structure inside spins the incoming air to separate liquid water and solid particles into the 108 cc condensate bowl, while the balanced, self-locking regulator maintains a steady outlet pressure. Weighing 950 g, this unit is a substantial component that requires a proper panel or frame mount rather than support from the tubing alone.
Airtac GAFR Adjustable Filter Regulator GAFR50020SJK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SJK |
|---|---|
| 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 | PC |
| 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 GAFR50020SJK
| GAFR500 | GA500 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. 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 GAFR50020SJK Is Used
Machine Header Feed
Feed a clean, regulated air supply to a machine header serving multiple pneumatic actuators and valves. The 3/4in port and 950 g body are sized for a fixed installation with rigid piping.
Multi-Station Assembly Line
Provide a stable pressure source for a multi-station assembly line where consistent force is critical. The balanced regulator holds the set pressure as supply fluctuates, and the 40 um element protects downstream precision tools.
Process Equipment Skid
Mount on a process equipment skid to condition air for a bank of control valves and positioners. The 108 cc bowl and semi-auto drain suit a line that is checked regularly by an operator.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SJK the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in port systems needing a robust filtration and regulation point. The 108 cc drain bowl holds more condensate than the 60 cc bowl on a GAFR300, meaning less frequent draining on larger lines. This model ships with a semi-auto drain and a manual drain, both fitted, and includes the standard 40 um element; the PC bowl and PT threads (MPa/psi gauge scale) are the default build. The J code means the mounting bracket is omitted, so plan for a panel mount or use an existing bracket, and the K code indicates the reverse-flow (reflux) valve is attached. If your application requires oil downstream, order the matching GAFC500-20 combination instead. With a 1.0 MPa max supply, you have about 0.1 MPa of headroom 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 GAFR50020SJK FAQ
The GAFR50020SJK is a filter & regulator with a 3/4in port. Its pressure range is 0.15-0.9 MPa (20-130 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). It operates in -5 to 70 C temperatures, has a 108 cc drain bowl, and weighs 950 g. The element is 40 um.
The K code indicates that a reverse-flow (reflux) valve is fitted to this unit. It is an ordering difference that adds the valve to the assembly. The specific function of the valve is detailed in the full catalogue, which is not included in our data.
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