Airtac GAFR Adjustable Filter Regulator GAFR50020ASK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ASK 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
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ASK
The GAFR50020ASK is a filter and regulator combined in a single body, handling 3/4in ports and weighing 950 g. It cleans incoming air via a diversion structure that spins out liquid water and solid particles, then delivers a steady outlet pressure through a balanced, self-locking regulator mechanism. This unit operates in the standard 0.15-0.9 MPa (20-130 psi) range and comes with a 40 um element.
This model includes an automatic drain and a circular gauge with an MPa/psi scale, plus a reverse-flow (reflux) valve. Its 108 cc condensate bowl and 8000 L/min flow curve (plotted at 0.7 MPa inlet) place it in the mid-large size class, suited for machine headers or multi-station lines. There is no lubricator in this unit; it only filters and regulates.
Airtac GAFR Adjustable Filter Regulator GAFR50020ASK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ASK |
|---|---|
| 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 | 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 | 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 GAFR50020ASK
| 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". |
| A | Drain: Automatic 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 GAFR50020ASK Is Used
Machine Header Feed
Supply a 3/4in header on a stamping press or assembly machine, where the 8000 L/min envelope (at 0.7 MPa inlet) supports multiple actuators and the automatic drain reduces maintenance stops.
Multi-Station Line
Feed a multi-station indexing line with consistent 0.15-0.9 MPa air, using the 108 cc bowl to extend time between drain checks in a moderately wet compressor room.
Panel-Mounted Regulator Station
Mount this 950 g unit on a control panel or frame where the included bracket secures it, delivering filtered, regulated air to a bank of valves without separate filter and regulator bodies.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ASK the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in port lines where a 950 g unit with a 108 cc drain bowl fits the service interval. The automatic drain (A) handles unattended operation or wet lines, while the included bracket simplifies panel mounting. This model has a 40 um element, a fitted gauge, and a PT thread with an MPa/psi scale; the reflux valve (K) is an ordering difference only. If your line needs oil downstream, order the matching GAFC500-20 combination instead. The 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan for a supply near 1.0 MPa to reach the full regulated output.
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 GAFR50020ASK FAQ
The GAFR50020ASK 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, automatic drain, 108 cc drain bowl, and 950 g weight. It has a fitted circular gauge with MPa/psi scale and a reverse-flow valve.
The automatic drain on the GAFR50020ASK expels condensate from the 108 cc bowl without manual intervention, making it suitable for unattended operation or lines with high moisture. It replaces the semi-auto and manual drain options found on blank-drain models.
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