Airtac GAFR Adjustable Filter Regulator GAFR400N15SJ
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15SJ 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15SJ
The GAFR400N15SJ is a filter and regulator combined in a single body, so incoming air is spun to separate liquid water and solid particles before a balanced regulator sets a steady outlet pressure. This 1/2in unit works across 0.15-0.9 MPa (20-130 psi) and comes with a 40 um element, while its nylon bowl holds 100 cc of condensate.
Because filtering and regulation share one housing, this part replaces a separate GAF filter plus a GAR regulator, which means fewer joints to seal and less rail width than two components. The pressed-in self-locking knob resists set-pressure drift from vibration, keeping the outlet stable as supply pressure varies.
Airtac GAFR Adjustable Filter Regulator GAFR400N15SJ Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15SJ |
|---|---|
| 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 | 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 | Not included (J) |
| 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 GAFR400N15SJ
| 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. |
| 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. |
| (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 GAFR400N15SJ Is Used
Machine tool air prep
Feed a 1/2in line to a CNC machine's pneumatic clamps and tool changers, where the 40 um element protects sensitive valves and the 100 cc bowl handles condensate between shifts.
Assembly station header
Supply a multi-operator workbench with filtered, regulated air at 0.15-0.9 MPa, using the semi-auto drain for scheduled maintenance and the circular gauge for quick pressure checks.
Test rig air supply
Use this 880 g unit on a prototype bench where the balanced regulator holds outlet pressure steady as shop supply fluctuates, and the nylon bowl resists the occasional knock from tools.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15SJ the Right Air-Prep Unit?
Choose this GAFR400 body when your line needs a 1/2in port and the 100 cc drain bowl that comes with it; step up to the GAFR500 for a 3/4in port and a 108 cc bowl, or down to the GAFR300 for a 3/8in port and a 60 cc bowl. The nylon bowl is a build choice with the same 1.0 MPa maximum and -5 to 70 C range as PC or metal versions, so confirm compatibility for aggressive surroundings. This model ships with both semi-auto and manual drains, a fitted circular gauge reading MPa/psi, and no mounting bracket, so plan a panel or frame mount rather than supporting it from the tubing. The standard pressure type covers 0.15-0.9 MPa, the 40 um element suits general shop air, and the PT thread matches the gauge scale operators read. If the line needs oil downstream, order the matching GAFC400-15 combination instead, since this unit does not lubricate. A 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 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 GAFR400N15SJ FAQ
The GAFR400N15SJ is a filter & regulator with a 1/2in port, working pressure range of 0.15-0.9 MPa (20-130 psi), maximum pressure of 1.0 MPa (145 psi), and proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C, has a 100 cc drain bowl, weighs 880 g, and uses a 40 um element.
The J code means the mounting bracket is omitted, so you can mount the GAFR400N15SJ directly to a panel or use an existing bracket from your setup. This saves space and cost when you do not need the standard bracket, but you must provide your own mounting solution.
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