Airtac GAFR Adjustable Filter Regulator GAFR400N15S
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15S 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
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15S
The GAFR400N15S is a filter and regulator combined into a single body, so it cleans incoming air and stabilizes outlet pressure without needing separate components. This 1/2in model handles 0.15-0.9 MPa (20-130 psi) and uses a 40 um element to trap particles and separate liquid water.
Its nylon bowl holds 100 cc of condensate, and the unit weighs 880 g, placing it in the mid-size class for machine-level air preparation. The balanced regulator mechanism holds the set pressure steady as supply varies, while the pressed-in self-locking knob resists drift from vibration.
Airtac GAFR Adjustable Filter Regulator GAFR400N15S Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15S |
|---|---|
| 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 | Semi-auto drain + manual 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 GAFR400N15S
| 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". |
| (blank) | Drain: Semi-auto drain + manual 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 GAFR400N15S Is Used
Machine tool air prep
Feed a CNC lathe's pneumatic chuck and tool changer with clean, regulated air at 0.15-0.9 MPa, using the 100 cc bowl to capture condensate from a busy production line.
Assembly station supply
Power pneumatic screwdrivers and push cylinders on a benchtop assembly station, where the 1/2in port delivers adequate flow and the gauge lets operators verify set pressure at a glance.
Test rig air supply
Provide stable pressure to a leak-test fixture that cycles frequently, relying on the balanced regulator to hold the setpoint while the diversion filter removes water and solids from the incoming line.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15S the Right Air-Prep Unit?
Choose the GAFR400 when you need 1/2in ports and a 100 cc drain bowl, which holds about 1.7x the condensate of the GAFR300's 60 cc bowl for less frequent draining. The nylon bowl suits applications where a clear PC bowl is not required, and the included mounting bracket simplifies panel installation. This model ships with both semi-auto and manual drains, a fitted circular gauge reading MPa/psi, and a 40 um element; upgrade to the W code for 5 um filtration if you feed precision valves. If your line needs oil downstream, 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 GAFR400N15S FAQ
Working pressure is 0.15-0.9 MPa (20-130 psi), max pressure is 1.0 MPa (145 psi), and proof pressure is 1.5 MPa (215 psi). Temperature range is -5 to 70 C (must not freeze). The drain bowl holds 100 cc, the unit weighs 880 g, and the port size is 1/2in.
The N code specifies a nylon bowl, which is a build material choice offered alongside PC and metal options. All bowl materials share the same 1.0 MPa max pressure and -5 to 70 C temperature rating, so select based on your environment and confirm compatibility for aggressive surroundings with your supplier.
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