Airtac GAF Filter GAF400C15AJ
The AirTAC Airtac GAF Filter GAF400C15AJ 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 materialMetal
- 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 GAF400C15AJ
The GAF400C15AJ is a filter-only unit that spins incoming air to throw liquid water and solid particles into its 100 cc metal drain bowl, while the 40 um HDPE element traps fine grain. It protects downstream valves and cylinders from contamination, but has no regulator, gauge, or lubricator - it cleans air, not pressure.
This 1/2in port model weighs 640 g, placing it in the GAF400 size class that suits mid-size machine circuits. The automatic drain clears condensate without manual attention, and the metal bowl suits demanding shop environments. Its flow curve is plotted to 8000 L/min for sizing against neighbouring bodies.
Airtac GAF Filter GAF400C15AJ Technical Specifications
| Model | Airtac GAF Filter GAF400C15AJ |
|---|---|
| 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 | Metal |
| 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 GAF400C15AJ
| GAF400 | GA400 series air filter — sets the port range, drain-bowl capacity and weight. |
|---|---|
| C | Bowl material: Metal. 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 GAF400C15AJ Is Used
CNC coolant lines
Protect solenoid valves on a CNC lathe or mill from water carryover in the coolant-air circuit, where the automatic drain keeps the bowl from filling during long runs.
Assembly station headers
Feed a multi-fixture assembly bench with clean air at 1/2in porting, filtering solids before they reach pneumatic clamps and push cylinders.
Test rig air supply
Guard sensitive test fixtures and flow meters from pipe scale and water slugs, using the 40 um element for general shop air in a maintenance bay.
Is the Airtac GAF Filter GAF400C15AJ the Right Filter?
Choose the GAF400 body for 3/8in or 1/2in ports; it sits between the lighter GAF300 (360 g, 60 cc bowl) and the heavier GAF500 (680 g, 108 cc bowl). The metal bowl (C) is a build choice with the same common spec as PC or nylon - confirm compatibility for aggressive surroundings. This model has the automatic drain (A) for wet or unattended lines, omits the bracket (J) for panel mounting, and uses the standard 40 um element with PT threads. If you need a set pressure, step up to the GAFR400-15 filter-regulator instead. The 100 cc bowl holds about 1.67x the condensate of the GAF300's 60 cc bowl, meaning fewer drain checks between services.
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 GAF400C15AJ FAQ
It is a 40 um filter with a 1/2in port, rated for 0.15-0.9 MPa (20-130 psi) working pressure and 1.5 MPa (215 psi) proof pressure. Temperature range is -5 to 70 C. The metal drain bowl holds 100 cc and the unit weighs 640 g, with a flow curve plotted to 8000 L/min.
The A code means an automatic drain that expels condensate by itself, ideal for wet lines or unattended operation. A blank code would ship with both semi-auto and manual drains, requiring someone to open the manual valve periodically. This model has the automatic version only.
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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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