Airtac GAFR Adjustable Filter Regulator GAFR400N15LNK
The AirTAC Airtac GAFR Adjustable Filter Regulator GAFR400N15LNK 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 - 0.4 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 grade40 µm
- Bowl materialNylon
- Drainsemi-auto + manual
- Pressure gaugeNot fitted
- Weight880 g
About the Airtac GAFR Adjustable Filter Regulator GAFR400N15LNK
The GAFR400N15LNK is a filter and regulator built as a single body, so it cleans incoming air and holds a steady outlet pressure without needing a separate filter plus regulator pair. This 1/2in unit carries a nylon bowl and a 40 um element, and its lower-pressure regulator is set for 0.15-0.4 MPa (20-58 psi).
A diversion structure spins the air to drop liquid water and solid particles into the 100 cc condensate bowl, while the balanced regulator keeps the set pressure stable as supply varies. The pressed-in self-locking knob resists drift from vibration, and the unit weighs 880 g, so it needs a proper panel or frame mount rather than support from the tubing.
Airtac GAFR Adjustable Filter Regulator GAFR400N15LNK Technical Specifications
| Model | Airtac GAFR Adjustable Filter Regulator GAFR400N15LNK |
|---|---|
| Series | GAFR400 filter & regulator |
| Port size | 1/2" (PT thread) |
| Filtering grade | 40 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. 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 GAFR400N15LNK
| 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. |
| 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 GAFR400N15LNK Is Used
Precision valve control
Feed a bank of precision pneumatic valves on a 1/2in manifold where a stable 0.15-0.4 MPa supply is critical and the 40 um element protects fine internals.
Machine tool coolant lines
Supply a machine tool's air-operated coolant pump with filtered air at a capped 0.4 MPa, using the semi-auto drain to handle condensate between shifts.
Test rig air supply
Run a laboratory test rig that needs a regulated low-pressure air source, with the 100 cc bowl giving a reasonable interval between manual drains.
Is the Airtac GAFR Adjustable Filter Regulator GAFR400N15LNK the Right Air-Prep Unit?
Choose the GAFR400 body for a 1/2in line where the flow curve is plotted to 7000 L/min at 0.7 MPa inlet, a step up from the GAFR300's 3500 L/min envelope. The nylon bowl is a build choice, and the semi-auto plus manual drain means you can drain automatically when pressure drops or do it by hand. The L type tops out at 0.4 MPa, so if the machine may ever need more, the standard S type is the right part. This model includes the mounting bracket, has no gauge (the 1/4in gauge connection is ready if you add one), and carries the reverse-flow valve as an ordering difference. 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 the 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 GAFR400N15LNK FAQ
The GAFR400N15LNK is a filter & regulator with a 1/2in port, a nylon bowl, and a 40 um element. Its pressure range is 0.15-0.4 MPa (20-58 psi), with a max pressure of 1.0 MPa (145 psi) and proof pressure of 1.5 MPa (215 psi). It operates from -5 to 70 C and must not freeze. The drain bowl holds 100 cc and the unit weighs 880 g.
The L code means the regulator is set for 0.15-0.4 MPa, which suits applications that must not exceed that ceiling. The N after the port means no gauge is supplied, but the 1/4in gauge connection is there if you want to add one later. The reverse-flow valve is fitted as an ordering option.
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