Airtac GAFR Adjustable Filter Regulator GAFR400N15SJNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15SJNK 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 GAFR400N15SJNK
The GAFR400N15SJNK is a filter and pressure regulator combined into a single body, saving rail space and reducing potential leak points compared to separate units. It handles 1/2in ports and delivers a standard pressure range of 0.15-0.9 MPa (20-130 psi) with a 40 um filtering element.
This version features a nylon bowl and comes without a mounting bracket or gauge, but includes a reverse-flow valve. The diversion structure spins incoming air to separate liquid water and solid particles into the 100 cc drain bowl, while the balanced, self-locking regulator maintains a steady outlet pressure despite supply fluctuations.
Airtac GAFR Adjustable Filter Regulator GAFR400N15SJNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15SJNK |
|---|---|
| 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 | Not included (J) |
| 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 GAFR400N15SJNK
| 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). |
| J | No bracket (J) — supplied without the mounting bracket. |
| N | No pressure gauge; 1/4" gauge connection. |
| (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 GAFR400N15SJNK Is Used
Medium CNC Fixtures
Feed a multi-axis clamping fixture on a CNC mill where the 1/2in port and 7000 L/min flow envelope (at 0.7 MPa inlet) support multiple pneumatic cylinders. The 100 cc bowl handles condensate from a moderately wet shop line.
Assembly Line Sub-Manifold
Supply a small sub-manifold feeding three or four pick-and-place actuators on an assembly line. The self-locking regulator keeps set pressure stable despite vibration from adjacent stamping equipment.
Test Bench Air Supply
Provide clean, regulated air to a functional test bench for valves or fittings. The 40 um element protects sensitive test instrumentation, and the manual drain allows quick purging between shifts.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15SJNK the Right Air-Prep Unit?
Choose this GAFR400 for medium-flow applications needing 1/2in ports and a 100 cc condensate bowl, which holds about 1.7x the volume of a GAFR300's 60 cc bowl for less frequent draining. The nylon bowl offers a different build option compared to PC or metal, though all share the same 1.0 MPa (145 psi) maximum pressure rating. This model has a semi-auto drain plus manual drain, no bracket (J), no gauge (N), and a 40 um element; the gauge connection is 1/4in if you add one later. The reverse-flow valve (K) is fitted as an ordering difference, and the PT thread uses an MPa/psi gauge scale. If your 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 GAFR400N15SJNK FAQ
The GAFR400N15SJNK operates from 0.15-0.9 MPa (20-130 psi) with a maximum pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). Temperature range is -5 to 70 C. It has a 100 cc drain bowl and weighs 880 g. The port size is 1/2in and the filtering grade is 40 um.
The 'N' after the port code means no gauge is supplied, leaving a 1/4in gauge connection for adding one later. The 'J' means the mounting bracket is omitted, making this suitable for panel-mount installations or when using an existing bracket. Both options reduce cost when these features are not needed.
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