Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNK 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 materialMetal
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNK
The GAFR400C15ALJNK is a filter and regulator combined into a single body, eliminating the need for separate GAF and GAR units. This 1/2in port model operates in the lower pressure band of 0.15-0.4 MPa (20-58 psi) and uses a 40 um element to trap solids and separate liquid water.
Its metal bowl holds 100 cc of condensate, and the automatic drain clears it without manual intervention. Weighing 880 g, this unit requires proper panel mounting rather than support from tubing, and the integrated regulator maintains a steady outlet as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNK |
|---|---|
| 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 | Metal |
| 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 GAFR400C15ALJNK
| GAFR400 | GA400 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. 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. |
| 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 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 GAFR400C15ALJNK Is Used
Precision valve control
Feed a bank of precision pneumatic valves that require regulated pressure below 0.4 MPa for consistent actuation, with the automatic drain handling condensate from a wet compressor line.
Machine tool coolant lines
Supply a machine tool's pneumatic controls where lower pressure prevents over-actuation of sensitive cylinders, while the metal bowl resists impacts in the machining environment.
Test bench air supply
Provide regulated air to a laboratory test bench where the 0.15-0.4 MPa range matches component testing requirements, and the 40 um element protects downstream instrumentation.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400C15ALJNK the Right Air-Prep Unit?
Choose the GAFR400 body when you need 1/2in ports and a 100 cc drain bowl, stepping up from the GAFR300's 60 cc bowl for longer intervals between drains. The metal bowl suits demanding environments, while the automatic drain handles unattended or wet lines without manual checks. This lower-pressure type tops out at 0.4 MPa, so confirm your system never needs more than that. The J code means no bracket is included, and the N indicates no gauge is fitted, though the 1/4in gauge connection allows adding one later. The 40 um element handles general shop air, and the K code adds a reverse-flow valve as an ordering difference. If oil is needed downstream, order the matching GAFC400-15 combination instead. With the lower pressure range, 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 (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 GAFR400C15ALJNK FAQ
This filter & regulator has a 1/2in port, operates at 0.15-0.4 MPa (20-58 psi), with a 1.0 MPa (145 psi) maximum and 1.5 MPa (215 psi) proof pressure. Temperature range is -5 to 70 C, the metal drain bowl holds 100 cc, and the unit weighs 880 g. It uses a 40 um element and has an automatic drain.
The L code sets the pressure range to 0.15-0.4 MPa, suitable for applications that never need more than that. The N code means no gauge is supplied, though the 1/4in gauge connection allows adding one later. The K code adds a reverse-flow valve as an ordering difference.
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