Airtac GAFR Adjustable Filter Regulator GAFR50020SK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SK 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 GAFR50020SK
The GAFR50020SK is a filter and regulator combined into a single body, so incoming air is spun to separate liquid water and solid particles before a balanced regulator sets the outlet pressure. This 3/4in unit operates from 0.15-0.9 MPa (20-130 psi) with a 40 um element, and it has no lubricator - only the condensate drain bowl.
Weighing 950 g with a 108 cc drain bowl, this size class suits machine headers or multi-station lines where a single point of filtration and pressure control is needed. The pressed-in self-locking knob resists set-pressure drift from vibration, keeping the outlet stable as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR50020SK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SK |
|---|---|
| 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 | Included |
| 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 GAFR50020SK
| 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). |
| (blank) | Mounting bracket included. |
| (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 GAFR50020SK Is Used
Machine header supply
Feed a multi-station assembly machine header where one 3/4in filtered and regulated supply point serves several actuators, with the 108 cc bowl handling condensate between shifts.
Pressurized fixture line
Supply a row of pneumatic fixtures on a fabrication line, using the self-locking regulator to hold set pressure despite vibration from nearby presses and conveyors.
Process skid utility air
Provide filtered, regulated air to a process skid's valves and positioners, where the 40 um element protects sensitive components and the manual drain allows scheduled maintenance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SK the Right Air-Prep Unit?
Choose this GAFR500 body for 3/4in porting with a flow envelope plotted to 8000 L/min at 0.7 MPa inlet, stepping up from the GAFR400's 7000 L/min at 0.7 MPa inlet when more capacity is needed. The PC bowl is the standard build, while the semi-auto plus manual drain gives you both automatic condensate dumping and a manual override. The included mounting bracket supports the 950 g mass properly, and the fitted circular gauge reads in MPa/psi on the PT thread. A reverse-flow (reflux) valve is attached as an ordering difference, and the 40 um element handles general shop air. If the line needs oil downstream, order the matching GAFC500-20 combination instead. Max supply 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 GAFR50020SK FAQ
Working pressure range is 0.15-0.9 MPa (20-130 psi), max pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), temperature range is -5 to 70 C. The drain bowl holds 108 cc and the unit weighs 950 g.
The K indicates a reverse-flow (reflux) valve is fitted. It is an ordering difference shown in the catalogue as a separate pneumatic symbol; the function is detailed on a page not included in our data.
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1-Year Warranty
Covers non-human-caused product damage.
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