Airtac GAFR Adjustable Filter Regulator GAFR400N15L
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15L 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 materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15L
The GAFR400N15L is a filter and regulator combined in a single body, removing water and solid particles while setting a steady outlet pressure. This 1/2in unit weighs 880 g and uses a 40 um element, with a nylon bowl and a semi-auto plus manual drain.
Its lower-pressure type regulates from 0.15 to 0.4 MPa (20-58 psi), and the circular gauge with MPa/psi scale is fitted. The balanced regulator holds the set pressure as supply varies, and the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR400N15L Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15L |
|---|---|
| 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 | Nylon |
| 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 | 100 cc |
| Bracket | Included |
| Weight | 880 g |
Specifications follow the official AirTAC GAFR catalogue (pages 235-236). Air must not freeze in the unit. The fitted circular gauge reads in MPa / psi, set by the PT thread code. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR400N15L
| GAFR400 | GA400 series filter & regulator — sets the port range, drain-bowl capacity and weight. |
|---|---|
| N | Bowl material: Nylon. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 15 | Port size 1/2". This body offers 10 = 3/8", 15 = 1/2". |
| (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). |
| (blank) | Mounting bracket included. |
| (blank) | Circular pressure gauge fitted. |
| (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 GAFR400N15L Is Used
Precision valve control
Feed a bank of precision pneumatic valves on a 1/2in manifold, where the lower 0.4 MPa ceiling protects sensitive actuators from over-pressure while the 40 um element keeps particles out.
Machine tool coolant lines
Supply a machine tool's air-operated coolant pump with filtered, regulated air. The 100 cc bowl handles condensate from a wet line, and the semi-auto drain allows quick manual purging between shifts.
Test bench air supply
Power a laboratory test bench with a stable 0.3 MPa setpoint for calibration fixtures. The self-locking knob holds the setting despite bench vibration, and the gauge confirms output at a glance.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15L the Right Air-Prep Unit?
Choose the GAFR400 body for 1/2in porting and a 100 cc drain bowl, a step up from the GAFR300's 60 cc bowl for longer intervals between draining. The nylon bowl is a build choice with the same 1.0 MPa maximum as PC or metal, so confirm compatibility for aggressive surroundings. This model ships with the mounting bracket included, a 40 um element, and both semi-auto and manual drains fitted; the L type tops out at 0.4 MPa, so if the machine may ever need more, select the standard S type instead. The PT thread means the gauge reads MPa/psi, and no reverse-flow valve is fitted. If oil is needed downstream, order the matching GAFC400-15 combination rather than this unit. 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 GAFR400N15L FAQ
The GAFR400N15L is a filter & regulator with a 1/2in port, 100 cc drain bowl, and 880 g weight. Pressure range is 0.15-0.4 MPa (20-58 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. It uses a 40 um element with a nylon bowl.
The L type is designed for applications needing a maximum of 0.4 MPa (58 psi), which is about 44% of the standard type's 0.9 MPa ceiling. It suits delicate equipment where higher pressure could cause damage, but it is not suitable if your system may ever require more than 0.4 MPa.
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