Airtac GAFR Adjustable Filter Regulator GAFR50020SJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020SJNK 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 GAFR50020SJNK
The GAFR50020SJNK is a filter and regulator combined into a single body, eliminating the need for separate GAF and GAR units. This 3/4in port version handles 0.15-0.9 MPa (20-130 psi) and uses a 40 um element to trap solids and liquid water.
A diversion structure spins incoming air to separate condensate into the 108 cc drain bowl, while the balanced regulator holds the set pressure steady as supply varies. The pressed-in self-locking knob resists drift from vibration, keeping the outlet stable without constant adjustment.
Airtac GAFR Adjustable Filter Regulator GAFR50020SJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020SJNK |
|---|---|
| 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 GAFR50020SJNK
| 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. |
| 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 GAFR50020SJNK Is Used
Machine Header Supply
Feed a 3/4in machine header serving multiple pneumatic actuators. The 108 cc drain bowl handles condensate from continuous operation, and the 950 g body needs a proper frame mount.
Multi-Station Assembly Line
Supply steady 0.15-0.9 MPa air to a multi-station assembly line where consistent pressure matters. The balanced regulator holds the setpoint as upstream pressure fluctuates.
Process Equipment Skid
Mount on a process equipment skid with a 3/4in air header. The semi-auto drain releases condensate automatically during operation, with manual backup for maintenance checks.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020SJNK the Right Air-Prep Unit?
This GAFR500 body with a 3/4in port and 950 g weight suits machine headers or multi-station lines. The PC bowl (blank code) is the standard build, and the semi-auto plus manual drain gives you both automatic condensate release and a manual override. The J code means no mounting bracket is included, so plan for a panel mount or existing bracket. No gauge is fitted (N), but the 1/4in gauge connection allows adding one later. The 40 um element is the standard grade, and PT threads with MPa/psi scale match common regional fittings. The K code indicates the reverse-flow (reflux) valve is attached as an ordering difference. If your line needs oil downstream, order the matching GAFC500-20 combination instead. 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 GAFR50020SJNK FAQ
Working pressure range is 0.15-0.9 MPa (20-130 psi). Maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and temperature range is -5 to 70 C. The drain bowl holds 108 cc and the unit weighs 950 g. It uses a 40 um element and has a 3/4in port.
The K code indicates the reverse-flow (reflux) valve is fitted. This is an ordering difference from standard models. The valve's function is detailed in the catalogue, but it is included as part of this specific configuration.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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