Airtac GAFR Adjustable Filter Regulator GAFR400N15LWK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15LWK 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 5 µm filter element and regulates 0.15 - 0.4 MPa (20 - 58 psi). It has no lubricator, so it adds no oil to the airflow.
- TypeFilter & regulator
- Port size1/2"
- Pressure range0.15 - 0.4 MPa (20 - 58 psi)
- Filtering grade5 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeCircular, MPa / psi
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15LWK
The GAFR400N15LWK is a filter and pressure regulator combined into a single body, so the incoming air is spun to separate water and solids before the balanced regulator holds a steady outlet pressure. This 1/2in unit works in the lower 0.15-0.4 MPa (20-58 psi) band and uses a 5 um element for finer filtration.
With a 100 cc condensate bowl and 880 g mass, this size class suits fixed machine installations where the body is bolted down rather than supported by tubing. The nylon bowl and the fitted reverse-flow valve are ordering differences to note, and there is no lubricator in this unit.
Airtac GAFR Adjustable Filter Regulator GAFR400N15LWK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15LWK |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 5 µm |
| Pressure range | 0.15 - 0.4 MPa (20 - 58 psi) |
| Type | Lower pressure |
| 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 GAFR400N15LWK
| 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. |
| L | Lower pressure type — 0.15 - 0.4 MPa (20 - 58 psi). This body offers Standard (S) or Lower pressure (L). |
| (blank) | Mounting bracket included. |
| (blank) | Circular pressure gauge fitted. |
| W | Filtering grade 5 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 GAFR400N15LWK Is Used
Low-pressure precision jigs
Feed a 1/2in line to a clamping jig or a light press that needs a stable 0.3 MPa supply, with the 5 um element protecting fine orifices in pilot valves.
Machine tool coolant circuits
Regulate air to a coolant mist system on a lathe or mill, where the lower pressure range prevents over-atomization and the 100 cc bowl handles condensate between shifts.
Test bench air supply
Supply a calibration or leak-test fixture at a set low pressure, relying on the balanced regulator to hold the outlet steady as the shop supply fluctuates.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15LWK the Right Air-Prep Unit?
Choose the GAFR400 body when you need a 1/2in port and a 100 cc drain bowl, stepping up from the GAFR300's 60 cc bowl when condensate volume is higher. The nylon bowl is a build choice with the same 1.0 MPa max pressure as PC or metal, so confirm compatibility for your environment. This L-type regulates only up to 0.4 MPa, which suits low-pressure circuits but is wrong if you may need more later. The 5 um element traps finer particles than the standard 40 um, at the cost of more frequent service. Both semi-auto and manual drains are fitted, the mounting bracket is included, and the PT thread means the gauge reads MPa/psi. The K code adds the reverse-flow valve, named here as an ordering difference only. If oil is needed downstream, order the matching GAFC400-15 combination instead. With a 1.0 MPa max supply, you have about 0.6 MPa of headroom above the 0.4 MPa top of this unit's regulated 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 GAFR400N15LWK FAQ
The GAFR400N15LWK is a filter & regulator with a 1/2in port, working range 0.15-0.4 MPa (20-58 psi), max pressure 1.0 MPa (145 psi), proof pressure 1.5 MPa (215 psi), temperature range -5 to 70 C, 5 um element, 100 cc drain bowl, and 880 g weight. It has a fitted gauge, included bracket, semi-auto plus manual drains, and a nylon bowl.
The K code indicates a reverse-flow (reflux) valve is fitted to the GAFR400N15LWK. This is an ordering difference from models without the K suffix. The catalogue does not detail its operation, so treat it as a specified option for your application.
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