Airtac GAFR Adjustable Filter Regulator GAFR50020SJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SJN 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 GAFR50020SJN
The GAFR50020SJN is a filter and regulator combined into a single body, handling both filtration and pressure control in one compact unit. It serves a 3/4in port line, operates from 0.15-0.9 MPa (20-130 psi), and comes with a 40 um element for standard particulate removal.
This 950 g unit has a 108 cc condensate bowl and no gauge, so the 1/4in gauge connection is available if you add one later. The filter spins incoming air to separate liquid water and solid particles, while the balanced regulator holds the set outlet pressure steady as supply varies.
Airtac GAFR Adjustable Filter Regulator GAFR50020SJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SJN |
|---|---|
| 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. 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 GAFR50020SJN
| 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. |
| 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 GAFR50020SJN Is Used
Machine header supply
Feed a 3/4in header serving multiple pneumatic actuators on a production machine, where the 108 cc bowl handles condensate from a busy line.
Multi-station assembly
Supply a multi-station assembly line with filtered, regulated air at a steady pressure, using the semi-auto drain to manage moisture in a warm shop.
Process control panels
Mount in a control panel for process equipment, where the compact single-body design saves rail space and the 40 um element protects sensitive valves.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SJN the Right Air-Prep Unit?
Choose the GAFR500 when you need a 3/4in port with a 108 cc drain bowl, stepping up from the GAFR400's 100 cc bowl for longer intervals between drains. The PC bowl suits standard shop air, and the semi-auto plus manual drain gives you both automatic condensate release and a manual override. This model has no bracket (J), so plan for a panel mount or an existing frame, and no gauge (N), so the 1/4in connection is ready for a field-installed gauge. The 40 um element handles general industrial air, while the PT thread matches common piping. If your line needs oil downstream, order the GAFC500-20 combination instead, which adds a lubricator. 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 GAFR50020SJN FAQ
The GAFR50020SJN is a filter & regulator with a 3/4in port, working pressure range of 0.15-0.9 MPa (20-130 psi), max pressure of 1.0 MPa (145 psi), proof pressure of 1.5 MPa (215 psi), and temperature range of -5 to 70 C. It has a 108 cc drain bowl, weighs 950 g, and uses a 40 um element.
The J code means the mounting bracket is omitted, so you can use an existing bracket or panel-mount the unit. The N code means no gauge is supplied, leaving the 1/4in gauge connection open for a gauge you add later. This saves cost when you already have these components in place.
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