Airtac GAFR Adjustable Filter Regulator GAFR400N15ASJN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15ASJN 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 - 0.9 MPa (20 - 130 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/2"
- Pressure range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- Bowl materialNylon
- Drainautomatic
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15ASJN
The GAFR400N15ASJN is a filter and regulator combined into a single body, with no lubricator section. It cleans incoming air through a diversion structure that spins out liquid water and solid particles, then delivers a steady outlet pressure via a balanced, self-locking regulator mechanism. This model uses a 1/2in port, a nylon bowl, and a 40 um element, operating from 0.15 to 0.9 MPa (20-130 psi).
Weighing 880 g, this unit is a substantial component that requires proper panel or frame mounting rather than support from the tubing. Its 100 cc condensate bowl and automatic drain make it suitable for wet or unattended lines, reducing the need for manual intervention compared to smaller bodies like the GAFR300 with its 60 cc bowl.
Airtac GAFR Adjustable Filter Regulator GAFR400N15ASJN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15ASJN |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Type | Standard |
| Bowl material | Nylon |
| 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 GAFR400N15ASJN
| 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". |
| A | Drain: Automatic drain. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 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 GAFR400N15ASJN Is Used
CNC coolant system
Feed a 1/2in line to a CNC machine's pneumatic coolant valve manifold. The automatic drain handles water from wet shop air, while the 40 um element protects the valve's precision orifices from scale and debris.
Assembly station header
Supply a multi-operator assembly station with a stable 0.4 MPa setpoint for pneumatic hand tools. The 100 cc bowl reduces drain frequency during a full shift, and the missing bracket suits a control panel mount.
Test bench air supply
Provide clean, regulated air to a lab test bench with sensitive pressure gauges. The balanced regulator holds the set pressure as the shop compressor cycles, and the 7000 L/min plotted envelope at 0.7 MPa inlet ensures ample capacity.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15ASJN the Right Air-Prep Unit?
Choose the GAFR400 body for medium-flow applications needing a 1/2in port, positioned between the GAFR300 (3/8in max, 3500 L/min envelope) and the GAFR500 (3/4in port). The nylon bowl (N) is a build choice; confirm compatibility for aggressive surroundings as no chemical data is printed. The automatic drain (A) handles condensate without manual checks, unlike the standard semi-auto+manual setup. This model omits the mounting bracket (J) for panel-mount installations and has no gauge (N), so the 1/4in gauge connection is available if you add one later. The standard pressure type (S) covers 0.15-0.9 MPa, and the PT thread uses an MPa/psi gauge scale. For lines needing oil downstream, order the matching GAFC400-15 combination instead. Note that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan your inlet pressure accordingly.
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 GAFR400N15ASJN FAQ
This filter & regulator has a working pressure range of 0.15-0.9 MPa (20-130 psi), a maximum pressure of 1.0 MPa (145 psi), and a proof pressure of 1.5 MPa (215 psi). It operates in temperatures from -5 to 70 C and must not freeze. The unit weighs 880 g and has a 100 cc condensate bowl.
The 'N' after the port 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, which suits installations where the unit is panel-mounted or uses an existing bracket. Both options reduce cost and component count when not needed.
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