Airtac GAFR Adjustable Filter Regulator GAFR50020LJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020LJNK 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 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size3/4"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialPC
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight950 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAFR Adjustable Filter Regulator GAFR50020LJNK
The GAFR50020LJNK is a filter & regulator from AirTAC, combining both functions in a single body to save space and reduce potential leak points. It handles a 3/4in port and delivers a lower pressure range of 0.15-0.4 MPa (20-58 psi), with a 40 um filter element protecting downstream components.
This unit weighs 950 g and includes a 108 cc condensate bowl, making it a substantial component for machine headers. The reverse-flow (reflux) valve is fitted as an ordering difference, and the absence of a gauge means the 1/4in gauge connection is available for adding one later.
Airtac GAFR Adjustable Filter Regulator GAFR50020LJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020LJNK |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| 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 GAFR50020LJNK
| 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. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 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 GAFR50020LJNK Is Used
Machine Header Supply
Feed a multi-station assembly machine header with regulated air at 0.15-0.4 MPa, using the 3/4in port to distribute to several actuators.
Low-Pressure Precision Tools
Supply delicate pneumatic tools or fixtures that require a stable, lower pressure setting, with the 40 um filter protecting internal components.
Test Rig Air Supply
Provide clean, regulated air to a test bench where consistent low pressure is critical, and the 108 cc bowl allows longer intervals between checks.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020LJNK the Right Air-Prep Unit?
Choose the GAFR500 body for 3/4in port applications where the 108 cc drain bowl and 8000 L/min flow envelope (plotted at 0.7 MPa inlet) suit medium-to-large machine lines. The L type limits regulation to 0.15-0.4 MPa (20-58 psi), so verify your system never needs more than 0.4 MPa. This model has no mounting bracket (J), a PC bowl, and a semi-auto plus manual drain, with a 40 um element and PT threads. If oil is needed downstream, order the matching GAFC500-20 combination instead. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 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 GAFR50020LJNK FAQ
The GAFR50020LJNK is a filter & regulator with a 3/4in port, working pressure range of 0.15-0.4 MPa (20-58 psi), max pressure of 1.0 MPa (145 psi), and proof pressure of 1.5 MPa (215 psi). It operates in -5 to 70 C temperatures, has a 108 cc drain bowl, and weighs 950 g.
The J code means the mounting bracket is omitted, suitable for panel-mount installations. The N code after the port means no gauge is supplied; the 1/4in gauge connection is available if you need to add one later to read the set pressure.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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