Airtac GAFR Adjustable Filter Regulator GAFR400N15AS
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15AS 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
- Drainautomatic
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15AS
The GAFR400N15AS is a filter & regulator from AirTAC, combining both functions in one body. It spins incoming air to separate liquid water and trap solid particles, then delivers a steady outlet pressure via a balanced, self-locking regulator. This model has a 1/2in port, a nylon bowl, and a 40 um element.
It operates from 0.15 to 0.9 MPa (20-130 psi) and weighs 880 g, placing it in the mid-size class. The automatic drain clears condensate from the 100 cc bowl without manual intervention, making it suitable for continuous operation. No lubricator is fitted, so oil must be added downstream if required.
Airtac GAFR Adjustable Filter Regulator GAFR400N15AS Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15AS |
|---|---|
| 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 | Automatic 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 | Included |
| 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 GAFR400N15AS
| 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". |
| A | Drain: Automatic drain. |
| S | Standard type — 0.15 - 0.9 MPa (20 - 130 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Mounting bracket included. |
| (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 GAFR400N15AS Is Used
CNC coolant lines
Feed a 1/2in line supplying coolant valves and actuators on a CNC machine. The automatic drain keeps the 100 cc bowl clear during long shifts, while the regulator holds set pressure for consistent operation.
Assembly station headers
Supply a multi-station assembly bench where several tools draw air simultaneously. The 880 g body with 1/2in porting handles the demand, and the included bracket secures it to the frame.
Test rig air supply
Use on a pneumatic test rig that requires clean, regulated air at a stable pressure. The 40 um element traps particles, and the gauge lets operators verify the setpoint before each cycle.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15AS the Right Air-Prep Unit?
Choose the GAFR400 body for 1/2in porting with a flow curve plotted to 7000 L/min at 0.7 MPa inlet. The nylon bowl offers an alternative build to the standard PC or metal options, while the automatic drain handles wet lines or unattended duty. The included bracket simplifies mounting, and the fitted circular gauge shows MPa/psi on the PT thread scale. For finer filtration, select the 5 um element option, or add a reverse-flow valve with the K code. If your line needs lubrication, order the matching GAFC400-15 combination instead. Max supply 1.0 MPa 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 GAFR400N15AS FAQ
The GAFR400N15AS is a filter & regulator with a 1/2in port, working pressure range of 0.15-0.9 MPa (20-130 psi), and a maximum pressure of 1.0 MPa (145 psi). Proof pressure is 1.5 MPa (215 psi), and the operating temperature range is -5 to 70 C. It has a 100 cc drain bowl and weighs 880 g.
The automatic drain (A code) expels condensate from the 100 cc bowl without manual action, unlike the semi-auto+manual drain on blank models. This suits wet lines or locations where regular draining is impractical, keeping the filter functioning without intervention.
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Covers non-human-caused product damage.
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