Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN 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 1/2" 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 size1/2"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade40 µm
- Bowl materialPC
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN
The GAFR40015ALJN is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. This 1/2in version has no gauge fitted, leaving a 1/4in connection ready if you add one later.
Its lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), with a 40 um element and an automatic drain. The 100 cc condensate bowl collects water and solids separated by the internal diversion structure, and the 880 g mass signals a unit that needs proper panel mounting rather than tubing support.
Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 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 | 100 cc |
| Bracket | Not included (J) |
| Weight | 880 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 GAFR400 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 GAFR40015ALJN
| GAFR400 | GA400 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). |
| 15 | Port size 1/2". This body offers 10 = 3/8", 15 = 1/2". |
| 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. |
| (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 GAFC400-15 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 | GAFR400 · 1/2" · curve to 7000 L/min |
|---|---|
| One size down | GAFR300 |
| One size up | GAFR500 (curve to 8000 L/min) |
| Add a lubricator | GAFC400-15 (F.R.L. combination) |
Where the Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require a stable, lower pressure supply. The balanced regulator holds the setpoint as line pressure varies, and the 40 um element protects sensitive internals from particle wear.
Machine tool coolant lines
Supply a machine tool's air-operated coolant pump with filtered air at a controlled lower pressure. The automatic drain clears condensate continuously, reducing maintenance stops on a busy production floor.
Test bench air supply
Provide a consistent 0.15-0.4 MPa source for pneumatic test fixtures and calibration rigs. The single-body design saves rail space, and the 1/2in port supports moderate flow to multiple test points.
Is the Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN the Right Air-Prep Unit?
Choose the GAFR400 body when you need 1/2in ports and a 100 cc drain bowl, stepping down from the GAFR500's 108 cc bowl if space is tighter. The PC bowl suits standard shop air, while the automatic drain handles wet lines without manual attention. The L type caps at 0.4 MPa, so verify your supply never needs more; the J code means no bracket is included, and the N code means no gauge ships with it. If your line needs oil downstream, order the GAFC400-15 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa above the 0.4 MPa top of the range.
Quick checklist
- ✓ Body size for your peak flow (1/2" 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 100 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 880 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 GAFC400-15 combination; do not expect an oil mist from this unit.
Airtac GAFR Adjustable Filter Regulator GAFR40015ALJN FAQ
It regulates air from 0.15 to 0.4 MPa (20-58 psi), with a maximum supply pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Operating temperature is -5 to 70 C, the drain bowl holds 100 cc, and the unit weighs 880 g.
The N code means no gauge is supplied, leaving a 1/4in gauge connection for adding one later. The J code means the mounting bracket is omitted, so you can use an existing bracket or panel-mount the unit. Both codes reduce cost when those accessories are not needed.
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