Airtac GAFR Adjustable Filter Regulator GAFR400N15SK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15SK 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 GAFR400N15SK
The GAFR400N15SK is a filter and regulator combined into a single body, so it cleans the air and sets a steady outlet pressure without needing a separate filter plus regulator pair. This 1/2in model weighs 880 g and uses a 100 cc nylon condensate bowl, with a 40 um element and a fitted circular gauge reading MPa/psi.
It carries a reverse-flow (reflux) valve as an ordering difference, and the semi-auto plus manual drain gives you both automatic condensate dumping and a manual override. The standard pressure range is 0.15-0.9 MPa (20-130 psi), and because the filter and regulator share one body, you eliminate one set of pipe joints compared to separate units.
Airtac GAFR Adjustable Filter Regulator GAFR400N15SK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15SK |
|---|---|
| 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 GAFR400N15SK
| 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. |
| K | Reverse-flow (reflux) valve attached. |
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 GAFR400N15SK Is Used
Machine tool air supply
Feed a CNC machine's pneumatic clamping system with filtered air at a stable 0.15-0.9 MPa, using the 1/2in port to match medium-bore actuators.
Assembly line header
Mount this 880 g unit on a panel to supply a short assembly line section, where the 100 cc bowl handles condensate from a few hours of operation before draining.
Test bench regulation
Use the fitted gauge and 40 um element to provide clean, regulated air to a pneumatic test fixture, with the semi-auto drain keeping the bowl from overflowing during long runs.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15SK the Right Air-Prep Unit?
Choose GAFR400 for 3/8in or 1/2in ports where a 100 cc drain bowl and 7000 L/min plotted flow at 0.7 MPa inlet suit a medium machine header. The nylon bowl is a build choice with the same 1.0 MPa maximum and -5 to 70 C rating as PC or metal, so confirm compatibility for aggressive surroundings. This model keeps the mounting bracket, has the standard 0.15-0.9 MPa range, and uses the semi-auto plus manual drain; the 40 um element is the standard grade, and the PT thread means the gauge scale is MPa/psi. If your line needs oil downstream, order the matching GAFC400-15 combination instead, since this unit does not lubricate. Remember that 1.0 MPa max supply leaves about 0.1 MPa above the 0.9 MPa top of the range, so plan for a supply near 1.0 MPa if you need 0.9 MPa outlet.
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 GAFR400N15SK FAQ
The GAFR400N15SK is a filter & regulator with a 1/2in port, 100 cc nylon drain bowl, and 880 g weight. Pressure range is 0.15-0.9 MPa (20-130 psi), maximum pressure is 1.0 MPa (145 psi), proof pressure is 1.5 MPa (215 psi), and temperature range is -5 to 70 C. It has a 40 um element, semi-auto plus manual drain, and a fitted gauge with MPa/psi scale.
The K code indicates the reverse-flow (reflux) valve is fitted, which is an ordering difference from models without it. The catalogue defers its function to a separate page, so we cannot explain its operation here; it is simply included on this GAFR400N15SK.
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