Airtac GAF Filter GAF400N15AJW
The AirTAC Airtac GAF Filter GAF400N15AJW is a genuine compressed-air filter. Its diversion structure spins the air to separate liquid water and trap solid particles down to 5 µm, protecting downstream valves and tools. It has 1/2" ports and a 100 cc drain bowl. It is a filter only — it does not regulate or set pressure.
- TypeAir filter
- Port size1/2"
- Filtering grade5 µm
- Pressure range0.15 - 0.9 MPa
- Bowl materialNylon
- Drainautomatic
- Drain bowl100 cc
- Weight640 g
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GAF Filter GAF400N15AJW
The GAF400N15AJW is a filter-only unit that spins incoming air to throw liquid water and solid particles into its 100 cc nylon bowl, while the 5 um HDPE core traps fine grain. It has no regulator, no gauge, and no lubricator; it simply cleans the air before it reaches your valves and cylinders.
This 1/2in model weighs 640 g and sits in the GAF400 size class, between the GAF300 and GAF500. The nylon bowl is a build choice for your environment, and the automatic drain handles condensate without manual attention, making it a strong fit for wet or unattended lines.
Airtac GAF Filter GAF400N15AJW Technical Specifications
| Model | Airtac GAF Filter GAF400N15AJW |
|---|---|
| Series | GAF400 air filter |
| Port size | 1/2" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Bowl material | Nylon |
| Drain type | Automatic drain |
| Bracket | Not included (J) |
| Fluid | Air |
|---|---|
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Capacity of drain bowl | 100 cc |
| Element | HDPE filter core |
| Weight | 640 g |
Specifications follow the official AirTAC GAF catalogue (pages 225-226). Air must not freeze in the unit. This is a filter only — it separates water and solid particles but does not set or hold a downstream pressure. To regulate pressure as well, use the matching GAFR400 filter-regulator.
Model Code: Airtac GAF Filter GAF400N15AJW
| GAF400 | GA400 series air filter — 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. |
| J | No bracket (J) — supplied without the mounting bracket. |
| W | Filtering grade 5 µm. |
| (blank) | PT port thread. |
A GAF has no regulator and no pressure gauge — there is no type, gauge or reflux code. Need to regulate pressure too? The matching GAFR400-15 is the same filter with a built-in regulator.
Size Class & Flow Envelope
- GAF2001/8"-1/4" · 3000 L/min
- GAF3001/4"-1/2" · 6000 L/min
- GAF4003/8"-1/2" · 8000 L/min
- GAF5003/4" · 9000 L/min
- GAF6003/4"-1" · 12000 L/min
Figures are the end of the flow curve plotted in the AirTAC catalogue — a sizing envelope for comparing bodies, not a rated flow. Read the catalogue curve for a real duty point. A filter this size drops less pressure at flow than the same-body GAFR filter-regulator, so match it to your peak demand.
| This model | GAF400 · 1/2" · curve to 8000 L/min |
|---|---|
| One size down | GAF300 |
| One size up | GAF500 (curve to 9000 L/min) |
| Add regulation | GAFR400-15 (filter + regulator) |
Where the Airtac GAF Filter GAF400N15AJW Is Used
CNC coolant lines
Protect precision solenoid valves on a CNC machine from water carryover and fine swarf, where the 5 um element and automatic drain keep the system running unattended through long shifts.
Packaging line pneumatics
Feed a bank of air cylinders on a packaging machine with clean, dry air, using the 100 cc bowl to reduce drain frequency compared to smaller filters on the same header.
Instrument air pre-filter
Position this filter ahead of sensitive instrumentation or flow meters, where the 5 um element traps fine particles that could affect readings or clog orifices.
Is the Airtac GAF Filter GAF400N15AJW the Right Filter?
Choose the GAF400 body when your line needs a 1/2in port and more condensate capacity than the GAF300's 60 cc bowl. The nylon bowl suits environments where you prefer its material properties, though compatibility for aggressive surroundings should be confirmed. The A code gives you an automatic drain, ideal for wet or remote lines, while the J code means no bracket is included, so plan for panel mounting or an existing bracket. The W element filters at 5 um for finer protection, and the PT thread standard must match your fittings. If you also need pressure control, step up to the GAFR400-15 filter-regulator instead. The proof pressure of 1.5 MPa is about 1.67x the 0.9 MPa top of the working range, giving you a clear overpressure margin for burst safety.
Quick checklist
- ✓ Body size for your peak flow (1/2" here)
- ✓ Element 40 µm (general) or 5 µm (fine)
- ✓ Bowl material: PC (blank), Metal (C), Nylon (N)
- ✓ Drain: semi-auto + manual, or automatic
- ✓ Bracket kept or removed (J)
- ✓ Need pressure control too? Use GAFR400
Installation & Maintenance Notes
- check Install with the airflow arrow: IN to OUT, bowl accessible.
- check Place the filter FIRST in the air-prep train, ahead of any regulator or lubricator.
- check Keep pressure at or below the 1.5 MPa (215 psi) proof limit.
- check Drain condensate before the 100 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 640 g unit on its bracket, not on the tubing.
This is a filter only — it removes water and solid particles but adds no pressure control and no lubrication. Add a GAR regulator, a GAL lubricator, or step up to the GAFR400-15 filter-regulator as your air-prep needs grow.
Airtac GAF Filter GAF400N15AJW FAQ
This filter-only unit has a 5 um HDPE element, a working pressure range of 0.15-0.9 MPa (20-130 psi), a proof pressure of 1.5 MPa (215 psi), and a temperature range of -5 to 70 C. It has a 100 cc drain bowl and weighs 640 g.
The A means it has an automatic drain that expels condensate without manual intervention, ideal for wet or unattended lines. The J means the mounting bracket is not included, so you need to use a panel mount or an existing bracket.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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