Airtac GAFR Adjustable Filter Regulator GAFR400N15SN
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15SN 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 gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15SN
The GAFR400N15SN is a filter and regulator combined in one body, so it cleans incoming air and stabilizes outlet pressure without needing separate units. It uses a 1/2in port and a nylon bowl, with a 40 um element and a 100 cc condensate bowl, weighing 880 g.
This standard type regulates from 0.15-0.9 MPa (20-130 psi), with a max supply of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). The diversion structure spins air to separate liquid water and solid particles, while the balanced regulator holds the set pressure steady as supply varies.
Airtac GAFR Adjustable Filter Regulator GAFR400N15SN Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15SN |
|---|---|
| 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. No gauge is supplied with this model — the gauge connection on a GAFR400 is 1/4" if you add one. This unit filters and regulates only; it does not add lubrication.
Model Code: Airtac GAFR Adjustable Filter Regulator GAFR400N15SN
| 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. |
| N | No pressure gauge; 1/4" gauge connection. |
| (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 GAFR400N15SN Is Used
Machine tool circuits
Feed a single machining center's pneumatic controls with clean, regulated air at a steady 0.15-0.9 MPa, using the 100 cc bowl to collect condensate over a shift.
Assembly station headers
Supply a multi-operator assembly bench where tools and fixtures need consistent pressure, with the semi-auto drain reducing manual checks on a busy line.
Test rig air supply
Provide filtered air to a laboratory test fixture that cycles actuators, relying on the balanced regulator to hold the setpoint as the shop supply fluctuates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15SN the Right Air-Prep Unit?
Choose the GAFR400 for medium-flow lines where a 1/2in port and 880 g mass suit a fixed installation. The nylon bowl is a build choice; the common 1.0 MPa max and -5 to 70 C rating apply to all bowl materials, so confirm compatibility for aggressive surroundings. This model includes the mounting bracket and has a semi-auto plus manual drain, so you can either let it purge automatically or drain it by hand. The 40 um element is the standard grade; select the W option for 5 um filtration if you need finer particle removal. No gauge is fitted, but the 1/4in gauge connection allows one to be added later, and the PT thread carries an MPa/psi scale. If the line needs oil downstream, order the matching GAFC400-15 combination instead. 1.0 MPa max supply 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 GAFR400N15SN FAQ
The GAFR400N15SN is a filter & regulator with a 1/2in port, working range 0.15-0.9 MPa (20-130 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), and temperature range -5 to 70 C. It has a 40 um element, a 100 cc drain bowl, and weighs 880 g. The bowl is nylon, the drain is semi-auto plus manual, and no gauge is fitted.
The N after the port code means no gauge is supplied. The GAFR400 has a 1/4in gauge connection, so you can add a compatible gauge later if you need to read the outlet pressure directly. Without one, the set pressure cannot be monitored on the unit.
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