Airtac GAF Filter GAF400N15AJ
The AirTAC Airtac GAF Filter GAF400N15AJ is a genuine compressed-air filter. Its diversion structure spins the air to separate liquid water and trap solid particles down to 40 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 grade40 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 GAF400N15AJ
The GAF400N15AJ is a genuine AirTAC air filter that uses a diversion structure to spin incoming air, throwing liquid water and solid particles into its 100 cc nylon drain bowl while the HDPE element traps fine grain. It is a filter only - it has no regulator, no pressure gauge, and no lubricator; it cleans the air but does not control pressure.
This 1/2in port model weighs 640 g and comes with a 40 um filter element, an automatic drain, and no mounting bracket. Its flow curve is plotted to 8000 L/min, and it operates in the 0.15-0.9 MPa (20-130 psi) range with a proof pressure of 1.5 MPa (215 psi).
Airtac GAF Filter GAF400N15AJ Technical Specifications
| Model | Airtac GAF Filter GAF400N15AJ |
|---|---|
| Series | GAF400 air filter |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 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 GAF400N15AJ
| 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. |
| (blank) | Filtering grade 40 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 GAF400N15AJ Is Used
CNC machine tool air supply
Feed a 1/2in line to a CNC machining center's pneumatic controls, where the 40 um element protects sensitive valves from water and scale while the automatic drain handles condensate without operator attention.
Assembly line pneumatic manifolds
Protect a multi-station assembly line's manifold and actuators with a 640 g filter that mounts on a panel or frame, using the automatic drain to shed water in a continuously running production environment.
Packaging machine air preparation
Install on a packaging machine's 1/2in air supply to remove water and solids before they reach cylinders and grippers, with the nylon bowl offering a transparent view of condensate levels.
Is the Airtac GAF Filter GAF400N15AJ the Right Filter?
Choose the GAF400N15AJ when you need a 1/2in port filter with a nylon bowl, automatic drain, and no bracket. The nylon bowl is a build choice - confirm compatibility for aggressive environments since no chemical data is printed. The automatic drain suits unattended or wet lines, while the missing bracket (J) means you will panel-mount it or use an existing bracket. The 40 um element is the general-purpose grade; select the W version for 5 um filtration if you need finer particle removal for precision valves. The PT thread standard must match your fittings. If you also need pressure control, the matching GAFR400-15 is the same filter with a built-in regulator. The 100 cc drain bowl holds about 1.67x the condensate of the GAF300's 60 cc bowl, so you will drain it less often.
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 GAF400N15AJ FAQ
The GAF400N15AJ is a filter-only unit with a 40 um HDPE element, 1/2in PT ports, and a 100 cc nylon drain bowl. It operates from 0.15-0.9 MPa (20-130 psi) with a proof pressure of 1.5 MPa (215 psi) and a temperature range of -5 to 70 C. The unit weighs 640 g and has a flow curve plotted to 8000 L/min.
The A code means this GAF400N15AJ has an automatic drain that expels accumulated condensate without manual intervention. This is ideal for unattended operation or wet compressed air lines where water collects quickly. Models without the A code ship with both semi-auto and manual drains for operator-controlled dumping.
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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