Airtac GAFR Adjustable Filter Regulator GAFR50020SN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SN 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 gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020SN
The GAFR50020SN is a filter & regulator combining air filtration and pressure regulation in a single body. It handles a 3/4in port and delivers a steady 0.15-0.9 MPa (20-130 psi) outlet, with a 40 um element trapping solid particles. Its 108 cc condensate bowl collects separated water and debris, and the unit weighs 950 g.
This model ships without a gauge, so the 1/4in gauge connection is available for adding one later. The mounting bracket is included, and the semi-auto plus manual drain options provide flexible condensate removal. This single unit replaces the need for separate filter and regulator components, reducing potential leak points and saving rail space.
Airtac GAFR Adjustable Filter Regulator GAFR50020SN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SN |
|---|---|
| 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. 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 GAFR50020SN
| 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| (blank) | Filtering grade 40 µm. |
| (blank) | PT thread; gauge scale MPa / psi. |
| (blank) | No reverse-flow valve. |
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 GAFR50020SN Is Used
Machine Header Feed
Feed a 3/4in header supplying multiple pneumatic actuators on a medium-sized assembly machine, ensuring clean, regulated air at a stable pressure.
Conveyor System Control
Regulate air for a conveyor line's pneumatic stops and diverters, where consistent pressure is critical for timing and reliable operation.
Process Equipment Skid
Mount on a process skid to filter and regulate air for control valves and positioners, providing a clean and stable air supply for instrumentation.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SN the Right Air-Prep Unit?
Choose the GAFR500 for 3/4in port applications that need a 108 cc drain bowl and a flow envelope plotted to 8000 L/min at 0.7 MPa inlet. The PC bowl is the standard build; select a metal or nylon bowl if your environment requires it, but confirm compatibility for aggressive surroundings. This model has the semi-auto and manual drains fitted, while the A code specifies an automatic drain for unattended lines. The standard S type covers 0.15-0.9 MPa, and the L type is for lower-pressure needs up to 0.4 MPa. The bracket is included, and the N code means no gauge is supplied, leaving the 1/4in connection open. The 40 um element is standard, with a 5 um option for finer filtration. PT thread is fitted, and the K code adds a reverse-flow valve. If lubrication is needed downstream, order the matching GAFC500-20 combination. The 1.0 MPa max supply 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 GAFR50020SN FAQ
The GAFR50020SN is a filter & regulator with a 3/4in port. Its pressure range is 0.15-0.9 MPa (20-130 psi), with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). The operating temperature range is -5 to 70 C. It has a 108 cc drain bowl and weighs 950 g.
The N in the model code indicates no gauge is supplied. This is for installations where a panel-mounted gauge is already present or where the set pressure is monitored remotely. The 1/4in gauge connection is still provided, allowing a gauge to be added later if needed.
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