Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNW
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNW 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 5 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 grade5 µm
- Bowl materialPC
- Drainautomatic
- Pressure gaugeNot fitted
- Weight950 g
About the Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNW
This AirTAC GAFR50020ALJNW is a filter and pressure regulator combined into a single body, so it cleans the air and sets a steady outlet pressure without needing separate GAF and GAR units. It has no lubricator and only one bowl, the 108 cc condensate bowl, which collects the water and solids spun out by the diversion structure.
The 3/4in port and 950 g mass place it in the GAFR500 size class, a step above the GAFR400's 880 g body. It regulates from 0.15 to 0.4 MPa (20-58 psi) and filters down to 5 um with the fitted element, making it a compact solution for a machine header.
Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNW Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNW |
|---|---|
| Series | GAFR500 filter & regulator |
| Port size | 3/4" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| 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 | 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 GAFR50020ALJNW
| 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. |
| 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. |
| W | Filtering grade 5 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 GAFR50020ALJNW Is Used
Machine header feed
A 3/4in port delivers filtered, regulated air to a machine header that supplies several actuators, with the 5 um element protecting precision valves from fine particulates.
Instrument air line
The 5 um filtration grade suits an instrument air line feeding sensors or controllers, while the automatic drain keeps the 108 cc bowl clear in a continuously running process.
Multi-station assembly
For a multi-station assembly line, this unit's 950 g body mounts on a frame and regulates a lower 0.4 MPa pressure for delicate operations, with the 3/4in port handling the combined flow.
Is the Airtac GAFR Adjustable Filter Regulator GAFR50020ALJNW the Right Air-Prep Unit?
The GAFR500 body with a 3/4in port suits a line feeding a machine header; the 108 cc drain bowl holds roughly 1.8x the condensate of the GAFR400's 100 cc bowl, so it needs less frequent draining. The L type tops out at 0.4 MPa, so confirm your supply never needs more than that, and the 5 um element traps finer particles than the standard 40 um for sensitive valves. The automatic drain handles wet lines without manual attention, the J code means no mounting bracket is included, and the N code means no gauge is fitted, though the 1/4in gauge connection is ready for one. The PT thread uses an MPa/psi gauge scale, and since this unit has no reverse-flow valve, a K code would add one if needed. If your line needs oil downstream, order the matching GAFC500-20 combination instead, as this filter-regulator does not lubricate. The 1.0 MPa max supply leaves about 0.6 MPa above the 0.4 MPa top of the range, so plan the inlet pressure accordingly.
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 GAFR50020ALJNW FAQ
The working pressure range is 0.15-0.4 MPa (20-58 psi), with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 108 cc, the unit weighs 950 g, and the flow curve is plotted to 8000 L/min at 0.7 MPa inlet.
The N code after the port means no gauge is supplied, so you cannot read the set pressure without adding one to the 1/4in gauge connection. The J code means the mounting bracket is omitted, which suits a panel mount or an existing frame that already supports the 950 g unit.
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