Airtac GAF Filter GAF50020AJ
The AirTAC Airtac GAF Filter GAF50020AJ 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 3/4" ports and a 108 cc drain bowl. It is a filter only — it does not regulate or set pressure.
- TypeAir filter
- Port size3/4"
- Filtering grade40 µm
- Pressure range0.15 - 0.9 MPa
- Bowl materialPC
- Drainautomatic
- Drain bowl108 cc
- Weight680 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 GAF50020AJ
The GAF50020AJ is a filter-only unit that spins incoming air to throw liquid water and solid particles into its 108 cc drain bowl, while the HDPE core traps fine grain. It has no regulator, no gauge and no lubricator - it cleans the air but never sets pressure.
This 3/4in model weighs 680 g and uses a 40 um element with an automatic drain. The PC bowl is a build choice; confirm compatibility for aggressive surroundings since no chemical or impact data is printed.
Airtac GAF Filter GAF50020AJ Technical Specifications
| Model | Airtac GAF Filter GAF50020AJ |
|---|---|
| Series | GAF500 air filter |
| Port size | 3/4" (PT thread) |
| Filtering grade | 40 µm |
| Pressure range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Bowl material | PC |
| 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 | 108 cc |
| Element | HDPE filter core |
| Weight | 680 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 GAFR500 filter-regulator.
Model Code: Airtac GAF Filter GAF50020AJ
| GAF500 | GA500 series air filter — sets the port range, drain-bowl capacity and weight. |
|---|---|
| (blank) | Bowl material: PC. Available on this body: PC (blank), Metal (C), Nylon (N). |
| 20 | Port size 3/4". This body offers 20 = 3/4". |
| 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 GAFR500-20 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 | GAF500 · 3/4" · curve to 9000 L/min |
|---|---|
| One size down | GAF400 |
| One size up | GAF600 (curve to 12000 L/min) |
| Add regulation | GAFR500-20 (filter + regulator) |
Where the Airtac GAF Filter GAF50020AJ Is Used
Machine Header Feed
Protect a 3/4in machine header serving multiple pneumatic stations from water and scale before it reaches valves.
High-Cycle Assembly Line
Use on a high-cycle assembly line where the automatic drain prevents bowl overflow during continuous shifts.
CNC Coolant-Air Supply
Filter compressed air for CNC tool changing or workholding circuits where solid debris would jam precision mechanisms.
Is the Airtac GAF Filter GAF50020AJ the Right Filter?
Choose the GAF50020AJ for a 3/4in line where the 108 cc bowl and automatic drain suit wet or unattended service. The J code omits the bracket for panel mounting, and the PT thread standard must match your fittings. For pressure control, step up to the matching GAFR500-20 filter-regulator instead. The 9000 L/min flow envelope is about 1.5x the GAF400's 8000 L/min curve, so this body suits larger headers.
Quick checklist
- ✓ Body size for your peak flow (3/4" 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 GAFR500
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 108 cc bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
- check Support the 680 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 GAFR500-20 filter-regulator as your air-prep needs grow.
Airtac GAF Filter GAF50020AJ FAQ
It is a 3/4in filter-only unit with a 40 um HDPE element, 108 cc drain bowl and 680 g weight. Working pressure is 0.15-0.9 MPa (20-130 psi), proof pressure is 1.5 MPa (215 psi), and temperature range is -5 to 70 C. The flow curve is plotted to 9000 L/min.
The A code means an automatic drain that expels condensate without manual intervention, ideal for wet lines or unattended operation. This model has no manual drain option fitted.
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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